Yield-related salinity tolerance traits identified in a nested association mapping (NAM) population of wild barley

被引：89

作者：

Saade, Stephanie ^{[1
]}

Maurer, Andreas ^{[2
]}

Shahid, Mohammed ^{[3
]}

Oakey, Helena ^{[1
]}

Schmockel, Sandra M. ^{[1
]}

Negrao, Sonia ^{[1
]}

Pillen, Klaus ^{[2
]}

Tester, Mark ^{[1
]}

机构：

[1] KAUST, BESE, Thuwal 239556900, Saudi Arabia

[2] Univ Halle Wittenberg, Inst Agr & Nutr Sci, Betty Heimann Str 3, D-06120 Halle, Germany

[3] ICBA, Dubai, U Arab Emirates

来源：

SCIENTIFIC REPORTS | 2016年 / 6卷

关键词：

SALT TOLERANCE; HORDEUM-VULGARE; GLUCOSIDASE-I; VARIETY; TRANSCRIPTOME; EXPRESSION; PROTEINS; MODELS; RICE; GENE;

D O I：

10.1038/srep32586

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Producing sufficient food for nine billion people by 2050 will be constrained by soil salinity, especially in irrigated systems. To improve crop yield, greater understanding of the genetic control of traits contributing to salinity tolerance in the field is needed. Here, we exploit natural variation in exotic germplasm by taking a genome-wide association approach to a new nested association mapping population of barley called HEB-25. The large population (1,336 genotypes) allowed cross-validation of loci, which, along with two years of phenotypic data collected from plants irrigated with fresh and saline water, improved statistical power. We dissect the genetic architecture of flowering time under high salinity and we present genes putatively affecting this trait and salinity tolerance. In addition, we identify a locus on chromosome 2H where, under saline conditions, lines homozygous for the wild allele yielded 30% more than did lines homozygous for the Barke allele. Introgressing this wild allele into elite cultivars could markedly improve yield under saline conditions.

引用

页数：9

共 34 条

[1] RNA-Seq analysis of the wild barley (H. spontaneum) leaf transcriptome under salt stress [J].