Extraordinary tertiary constrictions of Tripsacum dactyloides chromosomes: implications for karyotype evolution of polyploids driven by segmental chromosome losses.
نویسندگان
چکیده
Tripsacum dactyloides (2n = 2x = 36) is an ancient tetraploid species. Here we report that T. dactyloides chromosomes contain an extraordinary tertiary constriction, which causes a radical and distant separation of a terminal segment from the chromosome. The relationships between extraordinary tertiary constriction and segmental chromosome loss as well as karyotype evolution of polyploid species are discussed.
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ورودعنوان ژورنال:
- Genetics
دوره 179 2 شماره
صفحات -
تاریخ انتشار 2008