@article{fdi:010091371,
  title = {{S}election of wheat ({T}riticum aestivum {L}.) genotypes using yield components, water use efficiency and major metabolites under drought stress},
  author = {{M}utanda, {M}. and {F}iglan, {S}. and {C}haplot, {V}incent and {M}adala, {N}. {E}. and {S}himelis, {H}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}ntegrating grain yield, component traits and metabolite profiles aids in selecting drought-adapted and climate-smart crop varieties preferred by end users. {U}nderstanding the trends and magnitude of grain-based metabolites is vital for selecting wheat genotypes with higher grain yield, drought tolerance, water use efficiency and product profiles. {T}he aim of this study was to determine the response of newly developed wheat genotypes for grain yield and component traits and metabolites under drought stress to guide selection. {O}ne hundred wheat genotypes were preliminarily evaluated for agro-morphological traits and water use efficiency under drought-stressed and non-stressed conditions during the 2022 and 2023 growing seasons using a 5 x 20 alpha lattice design with two replications. {T}en high-yielding genotypes were selected based on grain yield and were validated for agronomic traits and water use efficiency ({WUE}), and grain samples were assayed to profile their key metabolites under drought-stressed conditions. {S}ignificant differences existed (p < 0.05) among the tested wheat genotypes for yield and yield components, {WUE}, drought tolerance and major metabolites to discern trait associations. {T}he grain yield of the 10 genotypes ranged from 590.00 g m(-2) (genotype {LM}70 x {BW}140) to 800.00 g m-2 ({BW}141 x {LM}71) under drought-stressed treatment, whilst under non-stressed it ranged from 760.06 g m -2 ({LM}70 x {BW}140) to 908.33 g m(-2) ({LM}71 x {BW}162). {G}rain yield-based water use efficiency of the assessed genotypes was higher under non-stressed (0.18 g mm(-1)) than drought-stressed (0.17 g mm-1) conditions. {T}he highest drought tolerance index (211.67) and stress susceptibility index (0.77) were recorded for {BW}162 x {LM}71, whilst the lowest tolerance index (23.33) and stress susceptibility index (0.09) were recorded in {BW}141 x {LM}71. {G}rain metabolites, including the apigenin-8-{C}-glucoside (log2{F}old = 3.00) and malate (log2{F}old = 3.60) were present in higher proportions in the high-yielding genotypes ({BW}141 x {LM}71 and {LM}71 x {BW}162) under drought-stressed conditions, whilst fructose (log2{F}old = -0.50) and cellulose (log2{F}old = -3.90) showed marked decline in the two genotypes. {B}ased on phenotypic and metabolite profile analyses, genotypes {BW}141 x {LM}71 and {LM}71 x {BW}162 were selected for being drought-tolerant, water-use efficient and recommended for production or breeding. {T}he findings revealed associations between yield components, water use efficiency and grain metabolites to guide the selection of best-performing and drought-tolerant wheat varieties.},
  keywords = {drought stress ; grain yield ; metabolites ; water use efficiency ; wheat},
  booktitle = {},
  journal = {{J}ournal of {A}gronomy and {C}rop {S}cience},
  volume = {210},
  numero = {5},
  pages = {e12766 [22 p.]},
  ISSN = {0931-2250},
  year = {2024},
  DOI = {10.1111/jac.12766},
  URL = {https://www.documentation.ird.fr/hor/fdi:010091371},
}