Favorable alleles for stem water-soluble carbohydrates identified by association analysis contribute to grain weight under drought stress conditions in wheat

PloS One
Weiyu LiRuilian Jing

Abstract

Drought is a major environmental constraint to crop distribution and productivity. Stem water-soluble carbohydrates (WSC) buffer wheat grain yield against conditions unfavorable for photosynthesis during the grain filling stage. In this study, 262 winter wheat accessions and 209 genome-wide SSR markers were collected and used to undertake association analysis based on a mixed linear model (MLM). The WSC in different internodes at three growth stages and 1000-grain weight (TGW) were investigated under four environmental regimes (well-watered, drought stress during the whole growth period, and two levels of terminal drought stress imposed by chemical desiccation under the well-watered and drought stress during the whole growth period conditions). Under diverse drought stress conditions, WSC in lower internodes showed significant positive correlations with TGW, especially at the flowering stage under well-watered conditions and at grain filling under drought stress. Sixteen novel WSC-favorable alleles were identified, and five of them contributed to significantly higher TGW. In addition, pyramiding WSC favorable alleles was not only effective for obtaining accessions with higher WSC, but also for enhancing TGW under different wate...Continue Reading

References

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Citations

Dec 10, 2015·Frontiers in Plant Science·Krishna S V JagadishNese Sreenivasulu
Jun 15, 2018·Physiologia Plantarum·Sundaravelpandian KalaipandianLynne C McIntyre
Jan 6, 2018·PloS One·Umakanta NgangkhamJawahar Lal Katara
Jul 1, 2020·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Luping FuYonggui Xiao
Aug 28, 2020·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Muhammad ShoaibAimin Zhang
Mar 5, 2021·Vavilovskiĭ Zhurnal Genetiki I Selekt︠s︡ii·A ZatybekovY Turuspekov

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Methods Mentioned

BETA
dissection
genotyping

Software Mentioned

PowerMarker
SPAGeDi
CLUMPP
SAS
NTSYSpc
tassel
STRUCTURE
GeneMapper

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