Unraveling the Complex Trait of Crop Yield With Quantitative Trait Loci Mapping in Brassica napus

Genetics - Tập 182 Số 3 - Trang 851-861 - 2009
Jiaqin Shi1, Yanhua Li1, Dan Qiu1, Congcong Jiang1, Yan Long1, Colin Morgan2, Ian Bancroft2, Jianyi Zhao3, Jinling Meng1
1National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
2John Innes Centre , Norwich Research Park, Colney, Norwich, NR4 7UH, United Kingdom and
3Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China

Tóm tắt

Abstract Yield is the most important and complex trait for the genetic improvement of crops. Although much research into the genetic basis of yield and yield-associated traits has been reported, in each such experiment the genetic architecture and determinants of yield have remained ambiguous. One of the most intractable problems is the interaction between genes and the environment. We identified 85 quantitative trait loci (QTL) for seed yield along with 785 QTL for eight yield-associated traits, from 10 natural environments and two related populations of rapeseed. A trait-by-trait meta-analysis revealed 401 consensus QTL, of which 82.5% were clustered and integrated into 111 pleiotropic unique QTL by meta-analysis, 47 of which were relevant for seed yield. The complexity of the genetic architecture of yield was demonstrated, illustrating the pleiotropy, synthesis, variability, and plasticity of yield QTL. The idea of estimating indicator QTL for yield QTL and identifying potential candidate genes for yield provides an advance in methodology for complex traits.

Từ khóa


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Thông tin
Thông tin xuất bản

Genetics

Tập 182 Số 3

851-861

Thông tin tác giả