In order to ensure the purity of hybrid seeds and improve the efficiency of seed production of heading Chinese cabbage,the cytoplasmic-nuclear male sterile line CMA was adopted to hybridize a range of inbred lines with different colors(orange red,yellow or white) of inner head leaves,various heading types(leaf-tip closed folded,leaf overlapped,cylindrical) and adaptation to different growing seasons(spring,summer and autumn).After multi-generation backcrosses and selection,a number of stable cytoplasmic-nuc...
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