Abstract：Taking the orange leaf head Chinese cabbage〔Brassica campestris L. ssp. pekinensis（Lour）Olsson〕self-line（LH）and the white leaf head Chinese cabbage（91-12）self-line as parents，we studied the hereditary feature of cotyledon color of orange leaf head Chinese cabbage and its stability in environment．The result showed that the cotyledon and leaf head of orange leaf head Chinese cabbage and normal leaf head Chinese cabbage，selfing and back-cross F1 and F1′，were both yellow．The separation ratio of F2 and BC1F1 cotyledon color were 3∶1 and 1∶1（yellow∶orange），respectively．This indicated that cotyledon color of orange leaf head was controlled by a pair of recessive alleles．And the inheritance of cotyledon color，flower color and leaf head color belongs to pleiotropism．In other words，if the cotyledon of a plant was orange，its leaf head and flower were also orange．Under the conditions of the dark or weak light treatment，seed leaves of orange leaf head Chinese cabbage showed orange after they were exposed in the sun for about 2 hours．Furthermore under the low temperature（0-3 ℃）and dark conditions，orange seed leaves of orange leaf head Chinese cabbage were observed more clearly，which were not affected by change of pregermination time（24 hours or 48 hours）．So cotyledon color of orange leaf head Chinese cabbage can be applied as an ideal morphological marker for the breeding of orange head Chinese cabbage．
耿新翠，沈向群，侯华，洪雅婷，马士芳. 橘红心大白菜形态标记的遗传及稳定性研究[J]. 中国蔬菜, 2012, 1(6): 21-26.
GENG Xin-cui，SHEN Xiang-qun*，HOU Hua，HONG Ya-ting，MA Shi-fang. Studies on Inheritance and Stability of Morphological Marker of Orange Leaf Head Chinese Cabbage. , 2012, 1(6): 21-26.
