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Molecular Markers Associated with Water Use Efficiency and Leaf Ash in Soybean
Author(s) -
Mian M. A. R.,
Bailey M. A.,
Ashley D. A.,
Wells R.,
Carter T. E.,
Parrott W. A.,
Boerma H. R.
Publication year - 1996
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1996.0011183x003600050030x
Subject(s) - biology , quantitative trait locus , water use efficiency , restriction fragment length polymorphism , glycine soja , agronomy , trait , locus (genetics) , randomized block design , population , allele , horticulture , genotype , genetics , glycine , gene , irrigation , demography , amino acid , sociology , computer science , programming language
Water use efficiency (WUE) is an important trait that has been associated with drought tolerance of crop plants, and leaf ash (LASH) generally related to WUE. A restriction fragment length polymorphism (RFLP) map was constructed from a soybean [ Glycine max (L.) Merr.] population of 120 F4‐derived lines from a cross of ‘Youngș × PI416937. The purpose of this research was to identify quantitative trait loci (QTL) associated with WUE and LASH in 36‐d‐old, greenhouse‐grown plants. The experimental design was a randomized complete block with six replications. Significant ( P < 0.01) phenotypic differences were detected among the lines for both traits. A total of four and six independent RFLP markers were associated with WUE and LASH and if combined each group of markers would explain 38 and 53% of the variability in the respective traits. One marker locus (cr497‐1), on USDA Linkage Group J, explained 13.2% of the variation in WUE indicating the presence of a major QTL. The LASH was negatively correlated with WUE ( r = −0.40**), and two QTL were associated with both WUE and LASH. For each of these QTL, the allele for increased WUE was associated with reduced LASH.