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| Genetic System Analysis of Stem/Leaf Characteristics in Tumorous Stem Mustard |
| LIU Yi-hua，ZHANG Zhao-rong，XIAO Li，ZHAO Shou-zhong |
| Fuling District Agricultural Science Institute of Chongqing， South Mustard Variety Improvement and Cultivation Techniques of National & Local United Engineering Laboratory， Tuber Mustard Variety Improvement and Cultivation Techniques of Chongqing Engineering Laboratory， Fuling 408000， Chongqing， China |
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Abstract Three inbred lines with different ratio of stem and leaf were used as parents and developed 2 hybrids. Their genetic systems in stem/leaf ratio of P1，P2，F1 and F2 were analyzed by method of joint segregation analysis of major gene plus polygenes mixed inheritance model．The results showed that the genetic systems in stem/leaf ratio of these 2 hybridized combinations were constructed by one pair of additive-dominant major genes plus additive-dominant-epistatic polygenes（ D-O）．Heritability of the major genes and polygenes in F2 generations were 60.17%-68.74% and 6.83%-10.23%，respectively．The additive effects of the major genes were more important than their dominant effects，and dominant effects showed negative in various degrees in 2 hybrid ized combinations.
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Received: 06 April 2013
Published: 09 May 2013
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