RRC ID 25668
著者 Okamoto Y, Kajimura T, Ikeda TM, Takumi S.
タイトル Evidence from principal component analysis for improvement of grain shape- and spikelet morphology-related traits after hexaploid wheat speciation.
ジャーナル Genes Genet Syst
Abstract Grain shape and size are involved in the main components of the domestication syndrome in cereals. Wheat grain shape has been dramatically altered at each stage of the domestication of tetraploid wheat and through common wheat speciation. To elucidate the evolutionary change of wheat grain shape, principal component (PC) analysis of grain shape-related traits was first conducted using wild and cultivated tetraploid, synthetic hexaploid, and common wheat accessions. The synthetic hexaploid wheat lines were previously produced through interspecific crosses between two common wheat progenitors, tetraploid wheat and Aegilops tauschii, and produced grains similar to those of cultivated tetraploid wheat. To identify genetic loci related to the difference in grain shape between common wheat and the synthetic wheat, the 15 traits related to grain and spikelet shape were measured in 108 F(2) individuals between Norin 61 and a synthetic wheat line, and the first three PC values for the 15 traits, PC1, PC2 and PC3, were mapped as quantitative traits in the F(2) population. In total, six QTLs, found on chromosomes 1A, 5A, 1D, 2D and 7D, showed significant LOD scores. Among them, a QTL for PC2, located on the 2DS chromosomal region near the Ppd-D1 locus, mainly contributed to the phenotypic difference in grain shape. Tg-D1, controlling tenacious glume phenotype, was located at a similar region to the 2DS QTL, which suggested that the Tg-D1 locus pleiotropically affects not only glume toughness but also spikelet and grain shape in hexaploid wheat. Therefore, it was predicted that wheat grains were rapidly improved toward a shorter and rounder phenotype accompanied with free-threshing wheat formation.
巻・号 87(5)
ページ 299-310
公開日 2012-1-1
DOI 10.1266/ggs.87.299
PII DN/JST.JSTAGE/ggs/87.299
PMID 23412632
MeSH Biological Evolution Chromosome Mapping Edible Grain / genetics* Edible Grain / ultrastructure Genetic Association Studies Genetic Linkage Phenotype* Polyploidy* Principal Component Analysis* Quantitative Trait Loci* Quantitative Trait, Heritable Triticum / genetics* Triticum / ultrastructure
IF 0.917
引用数 29
WOS 分野 GENETICS & HEREDITY BIOCHEMISTRY & MOLECULAR BIOLOGY
リソース情報
コムギ KU-2069 KU-2091 KU-2093 KU-2097 KU-2103 KU-2126 KU-2811 KU-2124 KU-20-8 KU-2092 KU-2105 KU-2158 KU-2159 KU-2829A KU-2814 KU-2090 KU-2152 KU-8451 KU-8672 KU-8713 KU-8944 KU-8736A KU-1952 KU-8941 KU-14401 KU-8817 KU-1978B KU-1959B KU-7309 KU-1063a KU-10501 KU-3371 KU-10497 KU-136 KU-328 KU-125 KU-9882 KU-9894 KU-144 KU-190-2 KU-3368 KU-9281 KU-330 KU-370 KU-3045 KU-3083 KU-3121 KU-3126 KU-3184 KU-3189 KU-4770