Analysis of QTL for seed oil content in Brassica napus by association mapping and QTL mapping
文献类型: 外文期刊
作者: Fu, Ying 1 ; Zhang, Dongqing 1 ; Gleeson, Madeleine 3 ; Zhang, Yaofeng 1 ; Lin, Baogang 1 ; Hua, Shuijin 1 ; Ding, Hou 1 ;
作者机构: 1.Zhejiang Acad Agr Sci, Inst Crop & Nucl Technol Utilizat, Hangzhou, Zhejiang, Peoples R China
2.Southwest Univ, Coll Agron & Biotechnol, Chongqing 400716, Peoples R China
3.Univ Queensland, Queensland Alliance Agr & Food Innovat, Queensland Biosci Precinct, Level 3 South, St Lucia, Qld, Australia
4.Norddeutsche Pflanzenzucht Hans Georg Lembke KG, D-24363 Hohenlieth, Germany
关键词: Brassica napus;Environment;Quantitative trait loci;Marker-trait association;Seed oil content
期刊名称:EUPHYTICA ( 影响因子:1.895; 五年影响因子:2.181 )
ISSN:
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收录情况: SCI
摘要: Increasing seed oil content is one of the most important breeding targets for rapeseed (Brassica napus). In this study, we combined quantitative trait loci (QTL) mapping and marker-trait association analysis to dissect the genetic basis of seed oil content in rapeseed. A doubled haploid (DH) population with 261 lines was grown in two highly contrasting macro-environments, Germany with winter ecotype environment and China with semi-winter ecotype environment, to explore the effect of environment effect of on seed oil content. Notable macro-environment effect was found for seed oil content. 19 QTL for seed oil content were identified across the two macro-environments. For association analysis, a total of 142 rapeseed breeding lines with diverse oil contents were grow in China macro-environment. We identified 23 simple sequence repeat (SSR) markers that were significantly associated with the seed oil content. Comparative analysis revealed that five QTL identified in the DH population, located on chromosomes A03, A09, A10 and C09, were co-localized with 11 significantly associated SSR markers that were identified from the association mapping population. Of which, the QTL on chromosome A10 was found to be homeologous with the QTL on chromosome C09 by aligning QTL confidence intervals with the reference genomes B. napus. Those QTL associated with specific macro-environments provides valuable insight into the genetic regulation of seed oil content and will facilitate marker-assisted breeding of B. napus.
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