A comparative analysis of agronomic water-use efficiency and its proxy measures as derived from key morpho-physiological and supportive quantitative genetics attributes of perennial ryegrass under imposed drought.

ABSTRACT: Water-use efficiency (WUE) is an under-researched but very important drought tolerance trait in forage breeding. This research estimated quantitative genetic parameters of morpho-physiological traits linked to agronomic water-use efficiency (WUE_A) and its proxy measures based on δ¹³C (WUE_i) or gas exchange (evapotranspiration, WUE_AET, or stomatal conductance WUE_ASC) of genotypes from half-sib families of Lolium perenne L. (PRG) in a simulated summer drought cycle. Principal component analysis (PCA) of trait data distinguished a group of PRG genotypes where high WUE_A and dry matter yield was associated with deep rooting, leaf hydration at more negative leaf osmotic and water potential, and reduced soil moisture depleti

SUBMITTER: Weerarathne LVY 

PROVIDER: S-EPMC10565840 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature