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
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.
