Dosage and parent-of-origin effects shaping aneuploid swarms in A. thaliana

摘要: Changes in chromosome number have a critical role the evolution and formation of plant species. Triploids, which carry three complete sets chromosomes, particular produce offspring with different numbers, including diploid tetraploid progeny, as well swarm aneuploid incomplete sets. In this study, we investigated mechanisms shaping these swarms at population level through detailed characterization progeny triploid Arabidopsis thaliana. We report that meiosis predominately produced gametes, most were viable. performed reciprocal crosses between either or plants karyotyped all surviving individuals. This allowed us to dissect parent-of-origin (cross-direction) effects also effect dosage crossing partner on inheritance each type. Overall, our data indicate chromosomal composition by A. thaliana strongly influenced selection acting against specific gamete combinations, but not necessarily associated aneuploidy. Finally, five types responded differently selection, suggesting presence dosage-sensitive factor(s) for viability encoded chromosomes.