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| Genetic Relationship between Chinese Cabbage with Orange Color in Inner Head and Purple Color in Leaf |
| ZHANG De-shuang，WANG Wei-hong，ZHANG Feng-lan，ZHAO Xiu-yun，YU Yang-jun，YU Shuan-cang，XU Jia-bing，LU Gui-xiang |
| Vegetable Research Center，Beijing Academy and Forestry Science，Beijing 100097，China |
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Abstract F1，F2，BC1 and BC2 generations were obtained through crossing，self-crossing and backcrossing by Chinese cabbage（Brassica campestris L. ssp. pekinensis）of orange color in inner head with pakchoi〔Brassica campestris L. ssp. chinensis（L.）Makino var. communis Tsen et Lee〕of purple color in leaf，in order to study the genetic relationship between inner head color and leaf color．Results showed that colors of F1 hybrids were non orange-purple colors．The ratios of 4 genotypes were close to 9 non orange-purple∶3 non orange-non purple∶3 orange-purple∶1 orange-non purple for F2 progenies．The ratio of orange-purple genotype ororPr- was close to 18.75%，of which was close to 6.25% for pure orange-purple genotype ororPrPr．For BC1 progenies，the ratios of 4 genotypes were close to 1 non orange-purple∶1 non orange-non purple∶1 orange-purple∶1 orange-non purple．For BC2 progenies，all plants owned non orange-purple colors．Results of x2 test deeply showed that the genetic relationship between inner head color and leaf color on Chinese cabbage and pakchoi was not linked，which controlled by 2 independent genes．Orange gene or was located on the end of chromosome 1 in A genome．Purple gene was located on some chromosomes except chromosome 1，which or gene was located．
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Received: 14 June 2011
Published: 25 July 2011
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