Genomic dissection of drought resistance in durum wheat x wild emmer wheat recombinant inbreed line population

被引：152

作者：

Peleg, Zvi ^{[1
,2
]}

Fahima, Tzion ^{[2
]}

Krugman, Tamar ^{[2
]}

Abbo, Shahal ^{[1
]}

Yakir, Dan ^{[3
]}

Korol, Abraham B. ^{[2
]}

Saranga, Yehoshua ^{[1
]}

机构：

[1] Hebrew Univ Jerusalem, Robert H Smith Inst Plant Sci & Genet Agr, IL-76100 Rehovot, Israel

[2] Univ Haifa, Fac Sci & Sci Educ, Inst Evolut, Dept Environm & Evolutionary Biol, IL-31905 Haifa, Israel

[3] Weizmann Inst Sci, Dept Environm Sci & Energy Res, IL-76100 Rehovot, Israel

来源：

PLANT CELL AND ENVIRONMENT | 2009年 / 32卷 / 07期

基金：

以色列科学基金会;

关键词：

Triticum turgidum ssp; dicoccoides; G x E interaction; homoeologous QTLs; quantitative trait loci; water stress; wheat; QUANTITATIVE TRAIT LOCI; CARBON-ISOTOPE DISCRIMINATION; WATER-USE EFFICIENCY; BACKCROSS QTL ANALYSIS; DENSITY GENETIC-MAP; EAR-EMERGENCE TIME; GRAIN-YIELD; ENVIRONMENT INTERACTIONS; MAPPING ANALYSIS; SPRING WHEAT;

D O I：

10.1111/j.1365-3040.2009.01956.x

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Drought is the major factor limiting wheat productivity worldwide. The gene pool of wild emmer wheat, Triticum turgidum ssp. dicoccoides, harbours a rich allelic repertoire for morpho-physiological traits conferring drought resistance. The genetic and physiological bases of drought responses were studied here in a tetraploid wheat population of 152 recombinant inbreed lines (RILs), derived from a cross between durum wheat (cv. Langdon) and wild emmer (acc# G18-16), under contrasting water availabilities. Wide genetic variation was found among RILs for all studied traits. A total of 110 quantitative trait loci (QTLs) were mapped for 11 traits, with LOD score range of 3.0-35.4. Several QTLs showed environmental specificity, accounting for productivity and related traits under water-limited (20 QTLs) or well-watered conditions (15 QTLs), and in terms of drought susceptibility index (22 QTLs). Major genomic regions controlling productivity and related traits were identified on chromosomes 2B, 4A, 5A and 7B. QTLs for productivity were associated with QTLs for drought-adaptive traits, suggesting the involvement of several strategies in wheat adaptation to drought stress. Fifteen pairs of QTLs for the same trait were mapped to seemingly homoeologous positions, reflecting synteny between the A and B genomes. The identified QTLs may facilitate the use of wild alleles for improvement of drought resistance in elite wheat cultivars.

引用

页码：758 / 779

页数：22

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