Delaying or delivering: identification of novel NAM-1 alleles that delay senescence to extend wheat grain fill duration.

ABSTRACT: Senescence is a complex trait under genetic and environmental control, in which resources are remobilized from vegetative tissue into grain. Delayed senescence, or 'staygreen' traits, can confer stress tolerance, with extended photosynthetic activity hypothetically sustaining grain filling. The genetics of senescence regulation are largely unknown, with senescence variation often correlated with phenological traits. Here, we confirm staygreen phenotypes of two Triticum aestivum cv. Paragon ethyl methane sulfonate mutants previously identified during a forward genetic screen and selected for their agronomic performance, similar phenology, and differential senescence phenotypes. Grain filling experiments confirmed a positive relationship between onset of senescence and grain fill duration, r

SUBMITTER: Chapman EA 

PROVIDER: S-EPMC8660559 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature