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利用DH和IF2群体检测油菜产量QTL
余华胜1, 张尧锋1, 钱 伟2, 贺亚军2, 傅 鹰1
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(1浙江省农业科学院作物与核技术利用研究所,杭州 310021;2西南大学农学与生物科技学院,重庆 400716)
摘要:
油菜产量性状是多基因控制的复杂数量性状,也是油菜遗传改良最重要的目标性状。本研究以欧洲冬性油菜品种‘Express’和中国半冬性油菜品系‘SWU07’构建了包含261个株系的双单倍体(doubled haploid, DH)群体和234个株系的永久F2(immortalized F2, IF2)群体,并在中国和德国不同的生态环境和年份环境条件下检测油菜产量性状QTL。结果显示,DH群体在中国2年环境下和德国1年环境下共检测出18个QTL,在IF2群体2年环境下共检测出15个QTL,分布在13个连锁群上,分别为A1、A2、A3.1、A3.2、A7.1、A7.2、A9、C1、C3、C4、C5、C8和C9连锁群,揭示2.27%~16.93%的表型变异。其中,位于A2、A3.1、A7.1、A9和C5连锁群上的6个位点可以在不同环境或者不同群体中被重复检测到,代表较为可信的产量性状连锁位点。本研究鉴定获得的这些QTL将为油菜产量性状的遗传改良提供有用信息。
关键词:  甘蓝型油菜  产量  数量性状位点
DOI:10.13430/j.cnki.jpgr. 20210408001
投稿时间:2021-04-08修订日期:2021-05-06
基金项目:浙江省自然科学基金(LQ19C130002);国家重点研发计划(2018YFD0100602);浙江省农业新品种选育重大科技专项(2016C02050-8)
QTL Mapping for Yield Traits in Brassica napus L. Using DH and Immortalized F2 Populations
YU Hua-sheng1, ZHANG Yao-feng1, QIAN Wei2, HE Ya-jun2, FU Ying1
(1Institute of Crop and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021;2 College of Agronomy and Biotechnology, Southwest University, Chongqing 400716)
Abstract:
Seed yield is the most important trait for genetic improvement in rapeseed, and it is controlled by quantitative loci/genes. In the present study, QTL mapping for seed yield in rapeseed were conducted at multiple environmental conditions, using a doubled haploid (DH) population derived from a cross between a winter-type cultivar ‘EXPRESS’ and semi-winter-type line ‘SWU07’, and an immortalized F2 population generated by randomly intermating among DH lines. A total of 18 putative QTL were identified in China across two years and 15 putative QTLs were identified in one year in Germany environment. These loci were located on 13 linkage groups including A1, A2, A3.1, A3.2, A7.1, A7.2, A9, C1, C3, C4, C5, C8 and C9, respectively, each of which could explain phenotypic variation ranging from 2.27% to 16.93%. Out of the identified QTL, six loci on linkage groups A2, A3.1, A7.1, A9 and C5 have been detected across environments or populations, thus becoming of interest in controlling seed yield in rapeseed. Collectively, these QTLs provided useful information for future improving seed yield in rapeseed breeding.
Key words:  Brassica napus  Seed yield  QTL

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