Extraordinary Tertiary Constrictions of Tripsacum dactyloides Chromosomes: Implications for Karyotype Evolution of Polyploids Driven by Segmental Chromosome Losses | Zendy

DalHoe Koo | Zendy; Jiming Jiang | Zendy

Open Access

Extraordinary Tertiary Constrictions of Tripsacum dactyloides Chromosomes: Implications for Karyotype Evolution of Polyploids Driven by Segmental Chromosome Losses

Author(s) -

DalHoe Koo,

Jiming Jiang

Publication year - 2008

Publication title -

genetics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.792

H-Index - 246

eISSN - 1943-2631

pISSN - 0016-6731

DOI - 10.1534/genetics.108.087726

Subject(s) - polyploid , karyotype , biology , secondary constriction , chromosome , genetics , chromosome number , evolutionary biology , ploidy , botany , gene

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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