Dissecting the genetic architecture of agronomic traits in multiple segregating populations in rapeseed (Brassica napus L.)

被引:42
作者
Wuerschum, Tobias [1 ]
Liu, Wenxin [1 ,2 ]
Maurer, Hans Peter [1 ]
Abel, Stefan [3 ]
Reif, Jochen C. [1 ]
机构
[1] Univ Hohenheim, State Plant Breeding Inst, D-70599 Stuttgart, Germany
[2] China Agr Univ, Crop Genet & Breeding Dept, Beijing 100193, Peoples R China
[3] Limagrain GmbH, D-31226 Peine Rosenthal, Germany
关键词
OILSEED RAPE; LINKAGE DISEQUILIBRIUM; QTL ANALYSIS; OIL CONTENT; SEED OIL; GENOME; LOCI; ASSOCIATION; LOCALIZATION; EPISTASIS;
D O I
10.1007/s00122-011-1694-5
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Detection of QTL in multiple segregating populations is of high interest as it includes more alleles than mapping in a single biparental population. In addition, such populations are routinely generated in applied plant breeding programs and can thus be used to identify QTL which are of direct relevance for a marker-assisted improvement of elite germplasm. Multiple-line cross QTL mapping and joint linkage association mapping were used for QTL detection. We empirically compared these two different biometrical approaches with regard to QTL detection for important agronomic traits in nine segregating populations of elite rapeseed lines. The plants were intensively phenotyped in multi-location field trials and genotyped with 253 SNP markers. Both approaches detected several additive QTL for diverse traits, including flowering time, plant height, protein content, oil content, glucosinolate content, and grain yield. In addition, we identified one epistatic QTL for flowering time. Consequently, both approaches appear suited for QTL detection in multiple segregating populations.
引用
收藏
页码:153 / 161
页数:9
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