期刊
BREEDING SCIENCE
卷 63, 期 4, 页码 423-429出版社
JAPANESE SOC BREEDING
DOI: 10.1270/jsbbs.63.423
关键词
allopolyploidization; grain shape; quantitative trait locus; synthetic wheat
资金
- Ministry of Education, Culture, Sports, Science and Technology of Japan [25292008]
- Elizabeth Arnold Fuji foundation
Synthetic hexaploid wheat is an effective genetic resource for transferring agronomically important genes from Aegilops tauschii to common wheat. Wide variation in grain size and shape, one of the main targets for wheat breeding, has been observed among Ae. tauschii accessions. To identify the quantitative trait loci (QTLs) responsible for grain size and shape variation in the wheat D genome under a hexaploid genetic background, six parameters related to grain size and shape were measured using SmartGrain digital image software and QTL analysis was conducted using four F-2 mapping populations of wheat synthetic hexaploids. In total, 18 QTLs for the six parameters were found on five of the seven D-genome chromosomes. The identified QTLs significantly contributed to the variation in grain size and shape among the synthetic wheat lines, implying that the D-genome QTLs might be at least partly functional in hexaploid wheat. Thus, synthetic wheat lines with diverse D genomes from Ae. tauschii are useful resources for the identification of agronomically important loci that function in hexaploid wheat.
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