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Genetic regulation of growth and nutrient content under phosphorus deficiency in the wild barley introgression library S42IL
Author(s) -
Soleimani Behnaz,
Sammler Ralf,
Backhaus Andreas,
Beschow Heidrun,
Schumann Erika,
Mock HansPeter,
Wirén Nicolaus,
Seiffert Udo,
Pillen Klaus
Publication year - 2017
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/pbr.12540
Subject(s) - biology , introgression , quantitative trait locus , hordeum vulgare , phosphorus deficiency , genetics , allele , plant breeding , shoot , agronomy , gene , poaceae , nutrient , ecology
Phosphorus (P) is an important macronutrient required for plant growth and yield formation. Since decades, breeders aim to optimize P efficiency in crops. We studied a set of 47 wild barley (Hordeum vulgare ssp . spontaneum, Hsp) introgression lines ( IL s) in hydroponic culture to identify quantitative trait loci ( QTL s) improving growth and nutrient content under P deficiency. Applying a mixed model analysis, a total of 91 independent QTL s were located among 39 IL s, of which 64 QTL s displayed trait‐improving Hsp effects. For example, an unknown Hsp allele on barley chromosome 4H increased shoot dry weight under P deficiency in three overlapping IL s by 25.9%. Likewise, an Hsp allele on barley chromosome 6H increased root dry weight under P deficiency in two overlapping IL s by 27.6%. In total, 31 QTL s confirmed Hsp effects already identified in previous field and glasshouse experiments with the same IL s. We conclude that wild barley contains numerous trait‐improving QTL alleles, which are active under P deficiency. In future, the underlying genes can be subjected to cloning and, simultaneously, used in elite barley breeding.