Abstract:

【Objective】 The aim of the experiment is to clarify the inheritance pattern and the gene localization of leaf color in heading cabbage(Brassica oleracea L.) 【Method】 The common heading cabbage 9601 with green color leaf and its trisomics were crossed with purple cabbage Ziyang respectively by artificial castration and pollination. Next year, the trisomic plants (2n+1) were selected from each F1 population by morphological observation and cytological identification and were crossed with the common cabbage 9601. The inheritance pattern of leaf color and gene localization were conducted by disomic analysis and trisomic analysis and χ2 test. 【Result】 Disomic analysis showed that leaf color (purple/green)of the cabbage was controlled by two independent genes with addition effect, and the purple color was dominant to green color. Trisomic analysis indicated that two genes controlling the leaf color were on the chromosome 3 and chromosome 8, respectively. 【Conclusion】 The leaf color of the cabbage was determined by two independent genes, and located on the chromosome 3 and chromosome 8, respectively.

Key words: heading cabbage(Brassica oleracea L.), primary trisomics, genetic analysis, gene location