Keywords: plants

Reflection on the Challenges, Accomplishments, and New Frontiers of Gene Drives

M. Melesse Vergara, J. Labbé and J. Tannous,  BioDesign Research,  2022:9853416. 2022.
Ongoing pest and disease outbreaks pose a serious threat to human, crop, and animal lives, emphasizing the need for constantgenetic discoveries that could serve as mitigation strategies. Gene drives are genetic engineering approaches discovered decadesago that may allow quick, ...
Keywords: , , , , ,

Rye B chromosomes differently influence the expression of A chromosome-encoded genes depending on the host species

A. Boudichevskaia, A. Fiebig, K. Kumke, A. Himmelbach and A. Houben,  Chromosome Research,  2022.
The B chromosome (B) is a dispensable component of the genome in many species. To evaluate the impact of Bs on the transcriptome of the standard A chromosomes (A), comparative RNA-seq analyses of rye and wheat anthers with and without additional rye Bs were conducted. In both ...
Keywords: , , , , ,

DriverSEAT: A spatially-explicit stochastic modelling framework for the evaluation of gene drives in novel target species

M. Legros and L. G. Barrett,  bioRxiv,  2022.06.13.496025. 2022.
Gene drives represent a potentially ground breaking technology for the control of undesirable species or the introduction of desirable traits in wild population, and there is strong interest in applying these technologies to a wide range of species across many domains including ...
Keywords: , , , , ,

Supergene potential of a selfish centromere

F. Finseth, K. Brown, A. Demaree and L. Fishman,  Philos Trans R Soc Lond B Biol Sci,  377:20210208. 2022.
Selfishly evolving centromeres bias their transmission by exploiting the asymmetry of female meiosis and preferentially segregating to the egg. Such female meiotic drive systems have the potential to be supergenes, with multiple linked loci contributing to drive costs or ...
Keywords: , , , , ,

Retraction Note: Selective inheritance of target genes from only one parent of sexually reproduced F1 progeny in Arabidopsis

T. Zhang, M. Mudgett, R. Rambabu, B. Abramson, X. Dai, T. P. Michael and Y. Zhao,  Nature Communications,  13:3270. 2022.
Retraction to: Nature Communications https://doi-org.proxy-um.researchport.umd.edu/10.1038/s41467-021-24195-5, published online 22 June 2021.We retract the article cited above because genotyping results from recent experiments are not consistent with the conclusions presented in ...
Keywords: , , , , ,

Recent advancements in CRISPR/Cas technology for accelerated crop improvement

D. Das, D. L. Singha, R. R. Paswan, N. Chowdhury, M. Sharma, P. S. Reddy and C. Chikkaputtaiah,  Planta,  255:109. 2022.
The likelihood of reduced agricultural production due to highly turbulent climatic conditions increases as the global population expands. The second paradigm of stress-resilient crops with enhanced tolerance and increased productivity against various stresses is paramount to ...
Keywords: , , , , ,

Biotechnological Road Map for Innovative Weed Management

A. C. S. Wong, K. Massel, Y. Lam, J. Hintzsche and B. S. Chauhan,  Frontiers in Plant Science,  13. 2022.
In most agriculture farmlands, weed management is predominantly reliant on integrated weed management (IWM) strategies, such as herbicide application. However, the overuse and misuse of herbicides, coupled with the lack of novel active ingredients, has resulted in the uptrend of ...
Keywords: , , , , ,

The non-Mendelian behavior of plant B chromosomes

J. Chen, J. A. Birchler and A. Houben,  Chromosome Res,  2022.
B chromosomes, also known as supernumerary chromosomes, are dispensable elements in the genome of many plants, animals, and fungi. Many B chromosomes have evolved one or more drive mechanisms to transmit themselves at a higher frequency than predicted by Mendelian genetics, and ...
Keywords: , , , , ,

B-A Chromosome Translocations Possessing an A Centromere Partly Overcome the Root-Restricted Process of Chromosome Elimination in Aegilops speltoides

D. Li, A. Ruban, J. Fuchs, H. Kang and A. Houben,  Frontiers in Cell and Developmental Biology,  10. 2022.
Some eukaryotes exhibit dramatic genome size differences between cells of different organs, resulting from the programmed elimination of chromosomes. Aegilops speltoides is an annual diploid species from the Poaceae family, with a maximum number of eight B chromosomes (Bs) in ...
Keywords: , , , , ,

Studying the active role of the maize B chromosome in the modulation of gene expression

University of Missouri,  Phys Org,  2022.
A team of University of Missouri biologists has made a new discovery that provides novel insights into the function and properties of the maize B chromosome. The study was led by Dr. Xiaowen Shi and Dr. Hua Yang, postdoctoral fellows in the Birchler lab, and reported in the ...
Keywords: , , , , ,

Effect of aneuploidy of a nonessential chromosome on gene expression in maize

X. Shi, H. Yang, C. Chen, J. Hou, T. Ji, J. Cheng and J. A. Birchler,  Plant Journal,  2022.
The nonessential supernumerary maize B chromosome (B) has recently been shown to contain active genes and be capable of impacting gene expression of the A chromosomes. However, the effect of the B chromosome on gene expression is still unclear. In addition, it is unknown whether ...
Keywords: , , , , ,

Versatile Applications of the CRISPR/Cas Toolkit in Plant Pathology and Disease Management

M. S. Wheatley and Y. N. Yang,  Phytopathology,  111:1080-1090. 2021.
New tools and advanced technologies have played key roles in facilitating basic research in plant pathology and practical approaches for disease management and crop health. Recently. the CRISPR/Cas (clustered regularly interspersed short palindromic repeats/CRISPR-associated) ...
Keywords: , , , , ,

Analysis of the Segregation Distortion of FcRAN1 Genotypes Based on Whole-Genome Resequencing of Fig (Ficus carica L.) Breeding Parents

H. Ikegami, K. Shirasawa, H. Yakushiji, S. Yabe, M. Sato, T. Hayashi, K. Tashiro and H. Nogata,  Frontiers in Plant Science,  12:8. 2021.
The common fig (Ficus carica L.) has a gynodioecious breeding system, and its sex phenotype is an important trait for breeding because only female plant fruits are edible. During breeding to select for female plants, we analyzed the FcRAN1 genotype, which is strongly associated ...
Keywords: , , , , ,

UC San Diego scientists develop the first CRISPR/Cas9-based gene drive in plants

M. Aguilera,  UC San Diego News Center,  2021.
With a goal of breeding resilient crops that are better able to withstand drought and disease, University of California San Diego scientists have developed the first CRISPR-Cas9-based gene drive in plants. While gene drive technology has been developed in insects to help stop the ...
Keywords: , , , , ,

Selective inheritance of target genes from only one parent of sexually reproduced F1 progeny in Arabidopsis

T. Zhang, M. Mudgett, R. Rambabu, B. Abramson, X. Dai, T. P. Michael and Y. Zhao,  Nature Communications,  12:3854. 2021.
Sexual reproduction constrains progeny to inherit allelic genes from both parents. Selective acquisition of target genes from only one parent in the F1 generation of plants has many potential applications including the elimination of undesired alleles and acceleration of trait ...
Keywords: , , , , ,

Ethics of Genome Editing

European Group on Ethics,  European Group on Ethics in Science and New Technologies,  2021.
This Opinion addresses the profound ethical questions raised and revived by them. It analyses various domains of application, from human health to animal experimentation, from livestock breeding to crop variety and to gene drives. With its wide view across areas, it identifies ...
Keywords: , , , , ,

Holocentric Chromosomes Probably Do Not Prevent Centromere Drive in Cyperaceae

M. Kratka, J. Smerda, K. Lojdova, P. Bures and F. Zedek,  Frontiers in Plant Science,  12:9. 2021.
In response to these selfish centromeres, the histone protein CenH3, which recruits kinetochore components, adaptively evolves to restore chromosomal parity and counter the detrimental effects of centromere drive. Holocentric chromosomes, whose kinetochores are assembled along ...
Keywords: , , , , ,

Atypical meiosis can be adaptive in outcrossed Schizosaccharomyces pombe due to wtf meiotic drivers

M. A. Bravo Núñez, I. M. Sabbarini, L. E. Eide, R. L. Unckless and S. E. Zanders,  eLife,  9:e57936. 2020.
Here, we demonstrate that in scenarios analogous to outcrossing, wtf drivers generate a fitness landscape in which atypical spores, such as aneuploids and diploids, are advantageous. In this context, wtf drivers can decrease the fitness costs of mutations that disrupt meiotic ...
Keywords: , , , , ,

Case Study 2: Oilseed Rape (Brassica napus L.)

Johnannes L. Frieß, Broder Breckling, Kathrin Pascher and Windfried Schröder,  Gene Drives at Tipping Points,  2020.
SPAGESelf-Propagating Artificial Genetic Elements (SPAGE) (Self-Propagating Artificial Genetic Element) technologies allow for a proliferation of genetic information on the populationPopulation level at a higher rate than usual Mendelian inheritanceMendelian inheritance. ...
Keywords: , , , , ,

Gene technologies in weed management: a technical feasibility analysis

N. Kumaran, A. Choudhary, M. Legros, A. W. Sheppard, L. G. Barrett, D. M. Gardiner and S. Raghu,  Current Opinion in Insect Science,  38:6-14. 2020.
With the advent of new genetic technologies such as gene silencing and gene drive, efforts to develop additional management tools for weed management is gaining significant momentum. These technologies promise novel ways to develop sustainable weed control options because gene ...
Keywords: , , , , ,

Herbicide resistant weeds: A call to integrate conventional agricultural practices, molecular biology knowledge and new technologies

V. E. Perotti, A. S. Larran, V. E. Palmieri, A. K. Martinatto and H. R. Permingeat,  Plant Science,  290:110255. 2019.
Herbicide resistant (HR) weeds are of major concern in modern agriculture. This situation is exacerbated by the massive adoption of herbicide-based technologies along with the overuse of a few active ingredients to control weeds over vast areas year after year. Also, many other ...
Keywords: , , , , ,

Herbicide resistant weeds: A call to integrate conventional agricultural practices, molecular biology knowledge and new technologies

V. E. Perotti, A. S. Larran, V. E. Palmieri, A. K. Martinatto and H. R. Perrningeat,  Plant Science,  290:15. 2019.
Herbicide resistant (HR) weeds are of major concern in modern agriculture. This situation is exacerbated by the massive adoption of herbicide-based technologies along with the overuse of a few active ingredients to control weeds over vast areas year after year. Also, many other ...
Keywords: , , , , ,

B chromosome first—mechanisms behind the drive of B chromosomes uncovered

Leibniz Institute of Plant Genetics and Crop Plant Research,  Phy Org,  2019.
The specific number of chromosomes is one of the defining characteristics of a species. Whilst the common fruit fly carries 8 chromosomes, the genome of bread wheat counts 42 chromosomes. In comparison, the human genome is made out of a total of 46 chromosomes. However, about 15% ...
Keywords: , , , , ,

A natural, conditional gene drive in plants

Conner, AJJ, J.M.E.,  bioRxiv,  519884:1-10. 2019.
A new class of gene drive in plant populations with herbicide resistance is described; a conditional gene drive that operates following herbicide application. Screening progeny from controlled crosses of Brassica napus heterozygous for a dominant allele conferring chlorsulfuron ...
Keywords: , , , , ,

Transmission ratio distortion is frequent in Arabidopsis thaliana controlled crosses

Seymour, DKC, E.; Arioz, B. I.; Koenig, D.; Weigel, D.,  Heredity,  122:294-304. 2019.
The equal probability of transmission of alleles from either parent during sexual reproduction is a central tenet of genetics and evolutionary biology. Yet, there are many cases where this rule is violated. The preferential transmission of alleles or genotypes is termed ...
Keywords: , , , , ,

Making a murderer: The evolutionary framing of hybrid gamete-killers

Sweigart, ALB, Yaniv; Fishman, Lila,  Trends in Genetics,  35:245-252. 2019.
Recent molecular investigations of hybrid incompatibilities have revealed fascinating patterns of genetic interactions that have been interpreted as the remnants of a history of selfish evolution. Instead of framing hybrid incompatibilities in light of genetic conflict, we ...
Keywords: , , , , ,

Gene drives in plants: opportunities and challenges for weed control and engineered resilience

Barrett, LGL, Mathieu; Kumaran, Nagalingam; Glassop, Donna; Raghu, S.; Gardiner, Donald M.,  Proceedings of the Royal Society B: Biological Sciences,  286:9. 2019.
Plant species, populations and communities are under threat from climate change, invasive pathogens, weeds and habitat fragmentation. Despite considerable research effort invested in genome engineering for crop improvement, the development of genetic tools for the management of ...
Keywords: , , , , ,

Gene driving the farm: who decides, who owns, and who benefits?

Montenegro de Wit, M,  Agroecology and Sustainable Food Systems,  43:1054-1074. 2019.
This commentary essay explores the social and ecological implications of gene-driving agriculture.
Keywords: , , , , ,

Forcing the Farm

etc group,  etc group,  2018.
This report is being issued as an alert to governments, civil society organisations and grassroots movements. It points to how gene drives, while promoted as a tool for medicine and conservation, will find their real use in food and farming by agribusiness. It calls for a pause ...
Keywords: , , , , ,

Gene drive systems: Do they have a place in agricultural weed management?

Neve, P,  Pest Management Science,  74:2672-2679. 2018.
There is a pressing need for novel control techniques in agricultural weed management. Direct genetic control of agricultural pests encompasses a range of techniques to introduce and spread novel, fitness-reducing genetic modifications through pest populations. Recently, the ...
Keywords: , , , , ,

Identifying and detecting potentially adverse ecological outcomes associated with the release of gene-drive modified organisms

Hayes, KRH, G. R.; Dana, G. V.; Foster, S. D.; Ford, J. H.; Thresher, R.; Ickowicz, A.; Peel, D.; Tizard, M.; De Barro, P.; Strive, T.; Dambacher, J. M.,  Journal of Responsible Innovation,  5:S139-S158. 2018.
Synthetic gene drives could provide new solutions to a range of old problems such as controlling vector-borne diseases, agricultural pests and invasive species. In this paper, we outline methods to identify hazards and detect potentially adverse ecological outcomes at the ...
Keywords: , , , , ,

THE NATIONAL BIOSAFETY TECHNICAL COMMISSION (CTNBio) NORMATIVE RESOLUTION No. 16, OF JANUARY 15, 2018

CTNBio,  National Biosafety Technical Commission of Brasil,  2018.
Sets forth the technical requirements for submitting an inquiry to the CTNBio concerning Precision Breeding Innovation Techniques. THE NATIONAL BIOSAFETY TECHNICAL COMMISSION (CTNBio), using its legal and regulatory powers and in observance of sections XV and XVI of article 14 of ...
Keywords: , , , , ,

Gene drive inhibition by the anti-CRISPR proteins AcrIIA2 and AcrIIA4 in Saccharomyces cerevisiae

Basgall, EMG, S. C.; Goeckel, M. E.; Giersch, R. M.; Roggenkamp, E.; Schrock, M. N.; Halloran, M.; Finnigan, G. C.,  Microbiology-Sgm,  164:464-474. 2018.
Given the widespread use and application of the clustered regularly interspaced short palindromic repeats (CRISPR)/Cas gene editing system across many fields, a major focus has been the development, engineering and discovery of molecular means to precisely control and regulate ...
Keywords: , , , , ,

A CRISPR–Cas9-based gene drive platform for genetic interaction analysis in Candida albicans

Shapiro, RSC, Alejandro; Porter, Caroline B. M.; Hamblin, Meagan; Kaas, Christian S.; DiCarlo, James E.; Zeng, Guisheng; Xu, Xiaoli; Revtovich, Alexey V.; Kirienko, Natalia V.; Wang, Yue; Church, George M.; Collins, James J.,  Nature Microbiology,  3:73-82. 2018.
Candida albicans is the leading cause of fungal infections; yet, complex genetic interaction analysis remains cumbersome in this diploid pathogen. Here, we developed a CRISPR–Cas9-based ‘gene drive array’ platform to facilitate efficient genetic analysis in C. albicans. In ...
Keywords: , , , , ,

CRISPR-based gene drives for pest control

McFarlane, GRW, C. Bruce A.; Lillico, Simon G.,  Trends in Biotechnology,  36:130-133. 2018.
Clustered regularly interspaced short palindromic repeats (CRISPR)-based gene drives (GDs) could be used to spread desirable genetic elements through wild populations. With the imminent development of this technology in vertebrates, we believe that it is timely to highlight two ...
Keywords: , , , , ,

Veni, vidi, vici: the success of wtf meiotic drivers in fission yeast

López Hernández, JFZ, Sarah E.,  Yeast,  35:447-453. 2018.
Meiotic drivers are selfish DNA loci that can bias their own transmission into gametes. Owing to their transmission advantages, meiotic drivers can spread in populations even if the drivers or linked variants decrease organismal fitness. Meiotic drive was first formally described ...
Keywords: , , , , ,

Development of a multi-locus CRISPR gene drive system in budding yeast

Yan, YF, Gregory C.,  Scientific reports,  8:17277-17277. 2018.
The discovery of CRISPR/Cas gene editing has allowed for major advances in many biomedical disciplines and basic research. One arrangement of this biotechnology, a nuclease-based gene drive, can rapidly deliver a genetic element through a given population and studies in fungi and ...
Keywords: , , , , ,

Tuning CRISPR-Cas9 gene grives in Saccharomyces cerevisiae

Roggenkamp, EG, Rachael M.; Schrock, Madison N.; Turnquist, Emily; Halloran, Megan; Finnigan, Gregory C.,  G3-Genes Genomes Genetics,  8:999. 2018.
Control of biological populations is an ongoing challenge in many fields, including agriculture, biodiversity, ecological preservation, pest control, and the spread of disease. In some cases, such as insects that harbor human pathogens (e.g., malaria), elimination or reduction of ...
Keywords: , , , , ,

Illinois study advances possibility of genetic control for major agricultural weeds

L. Quinn,  ACES News,  2017.
Waterhemp and Palmer amaranth, two aggressive weeds that threaten the food supply in North America, are increasingly hard to kill with commercially available herbicides. A novel approach known as genetic control could one day reduce the need for these chemicals. Now, scientists ...
Keywords: , , , , ,

Is it time for synthetic biodiversity conservation?

Piaggio, AJS, G.; Seddon, P. J.; Alphey, L.; Bennett, E. L.; Carlson, R. H.; Friedman, R. M.; Kanavy, D.; Phelan, R.; Redford, K. H.; Rosales, M.; Slobodian, L.; Wheeler, K.,  Trends in Ecology & Evolution,  32:97-107. 2017.
Evidence indicates that, despite some critical successes, current conservation approaches are not slowing the overall rate of biodiversity loss. The field of synthetic biology, which is capable of altering natural genomes with extremely precise editing, might offer the potential ...
Keywords: , , , , ,

wtf genes are prolific dual poison-antidote meiotic drivers

Nuckolls, NLN, M. A. B.; Eickbush, M. T.; Young, J. M.; Lange, J. J.; Yu, J. S.; Smith, G. R.; Jaspersen, S. L.; Malik, H. S.; Zanders, S. E.,  eLife,  6:e26033. 2017.
Meiotic drivers are selfish genes that bias their transmission into gametes, defying Mendelian inheritance. Despite the significant impact of these genomic parasites on evolution and infertility, few meiotic drive loci have been identified or mechanistically characterized. Here, ...
Keywords: , , , , ,

B chromosome in Plantago lagopus Linnaeus, 1753 shows preferential transmission and accumulation through unusual processes

Dhar, MKK, G.; Kaul, S.,  Comparative Cytogenetics,  11:375-391. 2017.
Plantago lagopus is a diploid (2n = 2x = 12) weed belonging to family Plantaginaceae. We reported a novel B chromosome in this species composed of 5S and 45S ribosomal DNA and other repetitive elements. In the present work, presence of B chromosome(s) was confirmed through FISH ...
Keywords: , , , , ,

Engineering species-like barriers to sexual reproduction

Maselko, MH, Stephen C.; Chacón, Jeremy M.; Harcombe, William R.; Smanski, Michael J.,  Nature Communications,  8:883. 2017.
Controlling the exchange of genetic information between sexually reproducing populations has applications in agriculture, eradication of disease vectors, control of invasive species, and the safe study of emerging biotechnology applications. Here we introduce an approach to ...
Keywords: , , , , ,

A large gene family in fission yeast encodes spore killers that subvert Mendel’s law

Hu, WJ, Z. D.; Suo, F.; Zheng, J. X.; He, W. Z.; Du, L. L.,  eLife,  6:e28567. 2017.
Spore killers in fungi are selfish genetic elements that distort Mendelian segregation in their favor. It remains unclear how many species harbor them and how diverse their mechanisms are. Here, we discover two spore killers from a natural isolate of the fission yeast ...
Keywords: , , , , ,

B Chromosomes – A matter of chromosome drive

Houben, A,  Frontiers in Plant Science,  8:210. 2017.
B chromosomes are supernumerary chromosomes which are often preferentially inherited, deviating from usual Mendelian segregation. The balance between the so-called chromosome drive and the negative effects that the presence of Bs applies on the fitness of their host determines ...
Keywords: , , , , ,

The End of the GMO? Genome Editing, Gene Drives and New Frontiers of Plant Technology

K. L. Hefferon and R. J. Herring,  Review of Agrarian Studies,  7. 2017.
mprovements to agriculture will constitute one of the world’s greatest challenges in the coming century. Political and social controversies, as well as complications of plant breeding, intellectual property, and regulation, have compromised the promised impact of genetically ...
Keywords: , , , , ,

Marcus Rhoades on preferential segregation in maize

Birchler, JA,  Genetics,  203:1489-1490. 2016.
Rhoades was studying a variant form of chromosome 10 with a conspicuous abnormality; it carried extensive heterochromatin at the tip of the long arm. This variant had been found by Albert Longley in indigenous maize varieties from the southwestern United States and provided to ...
Keywords: , , , , ,

A meiotic drive element in the maize pathogen Fusarium verticillioides is located within a 102 kb region of chromosome V

Pyle, JP, T.; Merrill, B.; Nsokoshi, C.; McCall, M.; Proctor, R. H.; Brown, D. W.; Hammond, T. M.,  G3-Genes Genomes Genetics,  6:2543-2552. 2016.
Fusarium verticillioides is an agriculturally important fungus because of its association with maize and its propensity to contaminate grain with toxic compounds. Some isolates of the fungus harbor a meiotic drive element known as Spore killer (Sk(K)) that causes nearly all ...
Keywords: , , , , ,

Comparative analysis of regions with distorted segregation in three diploid populations of potato

Manrique-Carpintero, NCC, J. J.; Veilleux, R. E.; Buell, C. R.; Douches, D. S.,  G3-Genes Genomes Genetics,  6:2617-2628. 2016.
Genes associated with gametic and zygotic selection could underlie segregation distortion, observed as alterations of expected Mendelian genotypic frequencies in mapping populations. We studied highly dense genetic maps based on single nucleotide polymorphisms to elucidate the ...
Keywords: , , , , ,

Pollen killer gene S35 function requires interaction with an activator that maps close to S24, another pollen killer gene in rice

Kubo, TY, A.; Kurata, N.,  G3-Genes Genomes Genetics,  6:1459-1468. 2016.
Pollen killer genes disable noncarrier pollens, and are responsible for male sterility and segregation distortion in hybrid populations of distantly related plant species. The genetic networks and the molecular mechanisms underlying the pollen killer system remain largely ...
Keywords: , , , , ,

The dawn of active genetics

Gantz, VMB, E.,  Bioessays,  38:50-63. 2016.
On December 18, 2014, a yellow female fly quietly emerged from her pupal case. What made her unique was that she had only one parent carrying a mutant allele of this classic recessive locus. Then, one generation later, after mating with a wild-type male, all her offspring ...
Keywords: , , , , ,

Mating type and spore killing characterization of Fusarium verticillioides strains

Guo, LB, A. Z.; Geiser, D. M.; Jimenez-Gasco, M. D.; Kuldau, G. A.,  Mycological Progress,  14:1045. 2015.
Fusarium verticillioides is a heterothallic ascomycete causing maize ear rot, and produces fumonisin mycotoxins harmful to livestock and human health. A meiotic drive phenomenon called spore killing has been reported in several filamentous fungi including F. verticillioides. F. ...
Keywords: , , , , ,

Centromere-associated meiotic drive and female fitness variation in Mimulus

Fishman, LK, J. K.,  Evolution,  69:1208-1218. 2015.
Female meiotic drive, in which chromosomal variants preferentially segregate to the egg pole during asymmetric female meiosis, is a theoretically pervasive but still mysterious form of selfish evolution. Like other selfish genetic elements, driving chromosomes may be maintained ...
Keywords: , , , , ,

Duplication and adaptive evolution of a key centromeric protein in Mimulus, a genus with female meiotic drive

Finseth, FRD, Y. Z.; Saunders, A.; Fishman, L.,  Molecular Biology and Evolution,  32:2694-2706. 2015.
The fundamental asymmetry of female meiosis creates an arena for genetic elements to compete for inclusion in the egg, promoting the selfish evolution of centromere variants that maximize their transmission to the future egg. Such "female meiotic drive" has been hypothesized to ...
Keywords: , , , , ,

Safeguarding CRISPR-Cas9 gene drives in yeast

DiCarlo, JEC, A.; Dietz, S. L.; Esvelt, K. M.; Church, G. M.,  Nature Biotechnology,  33:1250-1255. 2015.
RNA-guided gene drives capable of spreading genomic alterations made in laboratory organisms through wild populations could be used to address environmental and public health problems. However, the possibility of unintended genome editing occurring through the escape of strains ...
Keywords: , , , , ,

A critical component of meiotic drive in Neurospora is located near a chromosome rearrangement

Harvey, AMR, D. G.; Groskreutz, K. M.; Kuntz, D. R.; Sharp, K. J.; Shiu, P. K. T.; Hammond, T. M.,  Genetics,  197:1165-1179. 2014.
Neurospora fungi harbor a group of meiotic drive elements known as Spore killers (Sk). Spore killer-2 (Sk-2) and Spore killer-3 (Sk-3) are two Sk elements that map to a region of suppressed recombination. Although this recombination block is limited to crosses between Sk and ...
Keywords: , , , , ,

Genes that bias Mendelian segregation

Grognet, PL, H.; Malagnac, F.; Silar, P.,  PLOS Genetics,  10:e1004387. 2014.
Mendel laws of inheritance can be cheated by Meiotic Drive Elements (MDs), complex nuclear genetic loci found in various eukaryotic genomes and distorting segregation in their favor. Here, we identify and characterize in the model fungus Podospora anserina Spok1 and Spok2, two ...
Keywords: , , , , ,

Analysis of segregation distortion and its relationship to hybrid barriers in rice

Reflinur, K, B.; Jang, S. M.; Chu, S. H.; Bordiya, Y.; Akter, M. B.; Lee, J.; Chin, J. H.; Koh, H. J.,  Rice,  7:3. 2014.
Segregation distortion (SD) is a frequently observed occurrence in mapping populations generated from crosses involving divergent genotypes. In the present study, ten genetic linkage maps constructed from reciprocal F-2 and BC1F1 mapping populations derived from the parents ...
Keywords: , , , , ,

Evolution and biology of supernumerary B chromosomes

Houben, AB-M, A. M.; Klemme, S.; Timmis, J. N.,  Cellular and Molecular Life Sciences,  71:467-478. 2014.