Phenotype/genotype associations for yield and salt tolerance in a barley mapping population segregating for two dwarfing genes

被引：88

作者：

Ellis, RP ^{[1
]}

Forster, BP ^{[1
]}

Gordon, DC ^{[1
]}

Handley, LL ^{[1
]}

Keith, RP ^{[1
]}

Lawrence, P ^{[1
]}

Meyer, R ^{[1
]}

Powell, W ^{[1
]}

Robinson, D ^{[1
]}

Scrimgeour, CM ^{[1
]}

Young, G ^{[1
]}

Thomas, WTB ^{[1
]}

机构：

[1] Scottish Crop Res Inst, Dundee DD2 5DA, Scotland

来源：

JOURNAL OF EXPERIMENTAL BOTANY | 2002年 / 53卷 / 371期

关键词：

abiotic stress; barley; dwarf habit; QTL; genetic map; stable isotopes;

D O I：

10.1093/jexbot/53.371.1163

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Barley traits related to salt tolerance are mapped in a population segregating for a dwarfing gene associated with salt tolerance. Twelve quantitative trait loci (OTLs) were detected for seven seedling traits in doubled haploids from the spring barley cross Derkado x B83-12/21/5 when given saline treatment in hydroponics. The location of OTLs for seedling growth stage (leaf appearance rate), stem weight prior to elongation, and tiller number are reported for the first time. In addition, four QTLs were found for the mature plant traits grain nitrogen and plot yield. In total, seven QTLs are co-located with the dwarfing genes sdw1, on chromosome 3H, and ari-e.GP, on chromosome 5H, including seedling leaf response (SGa) to gibberellic acid (GA(3)). QTLs controlling the growth of leaves (GS2) on chromosomes 2H and 3H and emergence of tillers (TN2) and grain yield were independent of the dwarfing genes. Field trials were grown in eastern Scotland and England to estimate yield and grain composition. A genetic map was used to compare the positions of QTLs for seedling traits with, the location of QTLs for the mature plant traits. The results are discussed in relation to the study of barley physiology and the location of genes for dwarf habit and responses to GA.

引用

页码：1163 / 1176

页数：14

共 53 条

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