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Dominant early heading without yield drag in a sister-line BC breeding progeny DEH_229 is controlled by multiple genetic factors with maineffect loci

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The Crop Journal 2021年第2期9卷 400-411页

作者： Muhiuddin Faruquee Qiang Zhang Lubiao Zhang Linyun Xu Wensheng Wang Jiansan Chen Jianlong Xu Zhikang Li Binying Fu Tianqing Zheng Institute of Crop Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement Chinese Academy of Agricultural SciencesBeijing 100081China Shenzhen Institute of Breeding&Innovation Chinese Academy of Agricultural SciencesShenzhen 518120GuangdongChina Institute of Rice Research Guangdong Academy of Agricultural SciencesGuangzhou 510640GuangdongChina

Dominant early heading(DEH)in rice(Oryza sativa L.)is of interest in both breeding and *** genetic mechanisms underlying DEH have remained largely *** have developed a near-isogenic DEH line without yield drag named DEH_229 by sister-line backcross(BC)breeding with MH63,a restorer,as the genetic *** conducted a pilot genetic investigation under both short-day(SD)and long-day(LD)*** DEH line harbored only 1.06%variation in the genome sequence relative to *** variants were distributed throughout the *** QTL mapping by sequencing(QTL-seq)on an F_(2) population derived from a cross of MH63×DEH_229,57 loci were detected under the SD *** mapping employing a genome-wide association study with accessions from the 3000 rice genome sequencing project(3K-RG),reduced the number of QTL by 43.9%.Using Rice Functional Genomics&Breeding(RFGB)database,the number of SNP cluster regions within the QTL regions reduced by 27.3%.Further comparison of the genome variation between DEH_229 and MH63 in addition to gene annotation information revealed a new DEH allele of DTH3 with multiple variable sites as a possible major factor underlying the early-heading phenotype of DEH_*** InDel marker,ZMEH_1,was designed based on the variation between DEH_229 and MH63 within this *** accounted for 86.0%of heading date variation under both SD and LD conditions in 109 randomly chosen progeny derived from extreme lines of the MH63×DEH_229 *** study reveals the genetic complexity of DEH in the near-isogenic line and may provide useful material and marker information for plant molecular breeding.

关键词： Dominant early heading yield drag Sister-line BC breeding Multiple genetic factors Cryptic genetic variation(CGV) Rice(Oryza sativa L.)

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