Meiotic chiasmata variations in the H genome among Triticeae species of varying ploidy.

ABSTRACT: Meiotic chiasmata are critical for genetic diversity and chromosome segregation. This study aimed to cytologically analyze the variations in chiasmata within the H genome across different ploidy levels, specifically in diploid (Hordeum bogdanii), autotetraploid (Hordeum brevisubulatum), and allotetraploid (Elymus sibiricus) species, to understand the impact of polyploidization. We conducted a comparative cytological analysis of meiotic chiasmata in the H genome of the three species during diakinesis and metaphase I. This study revealed significant variations in the types and frequencies of chromosomal pairing configurations both across different species and among chromosomes within the same species. H. brevisubulatum exhibited a high frequency of quadrivalents.

SUBMITTER: Yang Y 

PROVIDER: S-EPMC12568566 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature