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| Genetic Analysis on Mixed Main Gene Plus Polyenes for TuMV Resistance in Chinese Cabbage〔Brassica campestris L. ssp. pekinensis（Lour）Olsson〕 |
| QIAN Wei，ZHANG Shu-jiang，ZHANG Shi-fan，LI Fei，ZHANG Hui，SUN Ri-fei* |
| Institute of Vegetables and Flowers，Chinese Academy of Agricultural Sciences，Beijing 100081，China |
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Abstract The Chinese cabbage〔Brassica campestris L. ssp. pekinensis（Lour）Olsson〕crosses between TuMV resistant material BP8407 and susceptible material‘Jizaochun’，and between TuMV resistant material‘Erqing’and susceptible material‘Chundajiang’were mechanically inoculated with TuMV-C4 isolate．The joint segregation analysis of P1，P2，F1 and F2 populations derived from these 2 crosses was used to study the inheritance in this paper．Each plant of the 4 populations mentioned above was further examined for its resistance to natural population of Chinese cabbage，according to its ELISA P/N per plant．The results indicated that the resistance was controlled by 2 additive-dominant-epistatic major-gene plus polygene．Major-gene heritability for the 2 crosses are 86.51% and 77.64%，respectively. Therefore，Chinese cabbage’s resistance to TuMV-C4 accords with the 2 major genes plus polygene．The inheritance for TuMV resistance of Chinese cabbage may provide foundation for its mechanism，coarse and fine resistant gene mapping，resistance breeding and marker assisted selection to TuMV．
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Received: 06 April 2012
Published: 02 May 2012
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