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Genetic Insights Into Natural Variation Underlying Salt Tolerance in Wheat by Long Li; Zhi Peng; Xinguo Mao; Jingyi Wang; Chaonan Li; Xiaoping Chang; Ruilian Jing is a Agricultural and Biological Sciences article available to read on EtoBox.

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## Abstract Developing salt-tolerant crop varieties is one of the important approaches to cope with increasing soil salinization worldwide. In this study, a diversity panel of 323 wheat accessions and 150 doubled haploid lines were phenotyped for salt-responsive morphological and physiological traits across two growth stages. The comprehensive salt tolerance of each wheat accession was evaluated based on principal component analysis. A total of 269 associated loci for salt-responsive traits and/or salt tolerance indices were identified by genome-wide association studies using 395 675 single nucleotide polymorphisms, among which 22 overlapping loci were simultaneously identified by biparental quantitative trait loci mapping. Two novel candidate genes ROOT NUMBER 1 (TaRN1) and ROOT NUMBER 2 (TaRN2) involved in root responses to salt stress fell within overlapping loci, showing different expression patterns and a frameshift mutation (in TaRN2) in contrasting salt-tolerant wheat genotypes. Moreover, the decline in salt tolerance of Chinese wheat varieties was observed from genetic and phenotypic data. We demonstrate that a haplotype controlling root responses to salt stress has been di

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Author

Long Li; Zhi Peng; Xinguo Mao; Jingyi Wang; Chaonan Li; Xiaoping Chang; Ruilian Jing

Publisher

Oxford University Press; Oxford University Press (OUP) (ISSN 0022-0957)

Published

2020

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)