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

Barley traits related to salt tolerance are mapped in a population segregating for a dwarfing gene associated with salt tolerance. Twelve quantitative trait loci (QTLs) were detected for seven seedling traits in doubled haploids from the spring barley cross Derkado×B83‐12/21/5 when given saline trea...

Full description

Saved in:

Bibliographic Details
Published in:	Journal of experimental botany 2002-05, Vol.53 (371), p.1163-1176
Main Authors:	Ellis, R.P., Forster, B.P., Gordon, D.C., Handley, L.L., Keith, R.P., Lawrence, P., Meyer, R., Powell, W., Robinson, D., Scrimgeour, C.M., Young, G., Thomas, W.T.B.
Format:	Article
Language:	eng
Subjects:	Abiotic stress Adaptation to environment and cultivation conditions Adaptation, Physiological - drug effects Adaptation, Physiological - genetics Agronomy. Soil science and plant productions Alleles Barley Biological and medical sciences Chromosome Mapping - methods Chromosomes dwarf habit Dwarfing Fundamental and applied biological sciences. Psychology Genetic loci genetic map Genetic Markers Genetics and breeding of economic plants Genotype Gibberellins - pharmacology Hordeum - drug effects Hordeum - genetics Hordeum - growth & development Phenotype Phenotypic traits Plant Leaves - drug effects Plant Leaves - genetics Plant Leaves - growth & development Plant physiology and development Plant Roots - drug effects Plant Roots - genetics Plant Roots - growth & development Plant Shoots - drug effects Plant Shoots - genetics Plant Shoots - growth & development Plants Plants and the Environment QTL Quantitative trait loci Quantitative Trait, Heritable Salt tolerance Salts - pharmacology stable isotopes Tillers Varietal selection. Specialized plant breeding, plant breeding aims Water and solutes. Absorption, translocation and permeability
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	Barley traits related to salt tolerance are mapped in a population segregating for a dwarfing gene associated with salt tolerance. Twelve quantitative trait loci (QTLs) were detected for seven seedling traits in doubled haploids from the spring barley cross Derkado×B83‐12/21/5 when given saline treatment in hydroponics. The location of QTLs 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 (GA3). 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.
ISSN:	0022-0957 1460-2431