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Acta Agron Sin ›› 2013, Vol. 39 ›› Issue (02): 207-215.doi: 10.3724/SP.J.1006.2013.00216


Genetic Analysis of Plant Type in Semi-Dwarf New Line (10D130) of Rapeseed

ZHOU Qing-Yuan,LI Jun-Qing,CUI Cui,BU Hai-Dong,YING Tao,YAN Ying-Hua,LI Jia-Na*,ZHANG Zheng-Sheng*   

  1. College of Agronomy and Biotechnology, South west University / Engineering Research Center of South Upland Agriculture, Ministry of Education / Chongqing Engineering Research Center for Rapeseed, Chongqing 400716, China
  • Received:2012-07-21 Revised:2012-10-09 Online:2013-02-12 Published:2012-12-11
  • Contact: 李加纳, E-mail: ljn1950@swu.edu.cn, Tel: 023-68251950; 张正圣, E-mail: zhangzs@swu.edu.cn, Tel: 023-68250993


Improvement of plant types is one of main methods to increase yield and qualities of rapeseed. Dwarf and semi-dwarf plant types help for enhancements of lodging resistance and harvest index. Six generations (P1, P2, F1, F2, B1, and B2) were produced from a cross between semi-dwarf 10D130 and Zhongshuang 11 (ZS11) to analyze inheritances of plant height, branch height, length of main inflorescence, valid branch space and numbers of valid branch in rapeseed (Brassica napus) by the mixed major gene plus polygene inheritance model. The results showed that the plant height, branch height, length of main inflorescence and valid branch space of 10D130×ZS11 were dominated by a pair of major gene with additive-dominant-epistasis effects plus polygenes with additive-dominance-epistasis effects (D-0 model). The additive effect and dominant effect of major gene of plant height were –8.58 and 7.44, and the heritability of the major gene in B1, B2, and F2 was 23.52%, 0.91%, and17.81%, respectively. The additive effect and dominant effect of major gene of branch height were –22.11 and 3.13, and the heritability of the major gene in B1, B2 and F2 was 49.95%, 40.85%, and 61.15%, respectively. The additive effect and dominant effect of major gene of length of main inflorescence were –2.21 and 1.6, and the heritability of the major gene of length of main inflorescence in B1, B2, and F2 was 0.68%, 47.94%, and 40.07%. The first valid branch space of 10D130×ZS11 was dominated by two pairs of major gene with additive-dominant-epistasis effects plus polygenes with additive-dominance-epistasis (E-1 model). The additive effects of major genes are –0.55 and 0.74, and the dominance effects of the two major genes were –1.66 and –1.29, respectively, and the heritability of the major genes in B1, B2,and F2 was 10.99%, 38.65%, and 44.10%. The branch height, length of main inflorescence, valid branch space and number of valid branch were significantly and positively correlated with plant height.

Key words: Rapeseed, Plant type, Major gene plus polygene, Genetic analysis

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