Pleiotropic effects of red and purple pericarp genes on seed coating patterns, flavonoids, dormancy, and germination in rice.

ABSTRACT: Seeds are coated with pigments presumably to promote plant adaptation. To understand the adaptive mechanisms of seed pigment traits, allelic variants of the red (Rc/rc) and purple (Pb/pb) pericarp color genes were assembled into the same genetic background to identify the trait development patterns and pleiotropies of the loci on seed flavonoids, dormancy, and germination in rice (Oryza sativa). Nonallelic recombination and epistasis of the loci dictated 4 patterns of the trait development from 5 to 40 d post-anthesis. The Rc- and Pb-controlled pigments were synthesized in the same lower epidermal cells but compartmented in the cells and lignified wall area, respectively, after 10 d. Four flavan-3-ols (catechin, epicatechin, and their dimeric procyanidins) and anthocyanins (AC) were detect

SUBMITTER: Tang W 

PROVIDER: S-EPMC12405871 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature