Diversity of a cytokinin dehydrogenase gene in wild and cultivated barley.

ABSTRACT: The cytokinin dehydrogenase gene HvCKX2.1 is the regulatory target for the most abundant heterochromatic small RNAs in drought-stressed barley caryopses. We investigated the diversity of HvCKX2.1 in 228 barley landraces and 216 wild accessions and identified 14 haplotypes, five of these with ten or more members, coding for four different protein variants. The third largest haplotype was abundant in wild accessions (51 members), but absent from the landrace collection. Protein structure predictions indicated that the amino acid substitution specific to haplotype 3 could result in a change in the functional properties of the HvCKX2.1 protein. Haplotypes 1-3 have overlapping geographical distributions in the wild population, but the average rainfall amounts at the collection sites for haploty

SUBMITTER: Czajkowska BI 

PROVIDER: S-EPMC6894797 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature