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QTLs for agronomic traits detected in recombinant inbred lines derived from a bread wheat x spelt cross

文献类型: 外文期刊

作者: Sakai, Yuki 1 ; Cao, Liangzi 1 ; Funata, Ryosuke 1 ; Shiraishi, Takatou 1 ; Yoshikawan, Koki 1 ; Maeno, Kohei 1 ; Miur 1 ;

作者机构: 1.Obihiro Univ Agr & Vet Med, Obihiro, Hokkaido 0808555, Japan

2.Iwate Univ, United Grad Sch Agr Sci, Morioka, Iwate 0208550, Japan

3.Heilongjiang Acad Agr Sci, Inst Crop Cultivat & Tillage, Harbin 150086, Heilongjiang, Peoples R China

关键词: grain dormancy; grain morphology; heading time QTL analysis; spelt wheat; spike morphology

期刊名称:BREEDING SCIENCE ( 2020影响因子:2.086; 五年影响因子:2.632 )

ISSN: 1344-7610

年卷期: 2018 年 68 卷 5 期

页码:

收录情况: SCI

摘要: Spelt wheat (Triticum aestivum subsp. spelta), a subspecies of common wheat, is a genetic resource for the breeding of bread wheat (T. aestivum subsp. aestivum); however, genetic analyses of agronomic traits in bread wheat x spelt crosses are insufficient. Here, we conducted QTL analysis in the recombinant inbred lines from a bread wheat x spelt cross. In addition to the major Q locus, QSpd.obu-4D was detected with the spelt allele conferring a higher spikelet density than the bread wheat allele. The effect of QSpd.obu-4D was evident in the presence of the Q allele of bread wheat, suggesting that this variation might be cryptic in spelt wheat with the q allele. Two QTLs with stable effects were identified for grain length, one of which (QGl.obu-1A) has never been detected in a bread wheat x spelt cross. The spelt wheat allele at QHt.obu-7B conferring later heading was identified in the Vrn-B3 region and could be a novel gene source for modifying heading time. Further-more, QGi.obu-2B, responsible for low grain dormancy of spelt wheat, was detected. Further exploration and identification of useful QTLs could accelerate the utilization of spelt wheat as a genetic resource for bread wheat breeding programs.

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