Penitente, MV, T. A.; Senhorini, J. A.; Bortolozzi, J.; Foresti, F.; Porto-Foresti, F.,
Anais Da Academia Brasileira De Ciencias,
85:1371-1377.
2013.
Cytogenetic studies were developed in Prochilodus lineatus (Valenciennes 1836), describing an interesting system of small supernumerary chromosomes. The purpose of this work is to study the frequency and morphology of B chromosomes in individuals from the parental line and the inheritance patterns of these elements in individuals obtained from controlled crosses in the species P. lineatus. The transmission rate of B chromosomes, revealed a k(B)=0.388 for the acrocentric type, a kB=0.507 for the metacentric type and a k(B)=0.526 for the submetacentric type. The obtained results raise hypothesis that B-acrocentric chromosomes are involved in an extinction process in this species, while the metacentric and submetacentric supernumerary elements comprises a neutral mechanism and follows a Mendelian transmission rate.
https://www.geneconvenevi.org/wp-content/uploads/2020/04/Anais-Da-Academia-Brasileira-De-Ciencias-1.png300300Academic Web Pages/wp-content/uploads/2019/10/GC-color-logo-for-header-3277-x-827-1030x260.pngAcademic Web Pages2013-01-16 00:00:002020-04-22 16:40:22Transmission rate variation among three B chromosome variants in the fish Prochilodus lineatus (Characiformes, Prochilodontidae)