ISHS Acta Horticulturae 402: International Symposium on Cultivar Improvement of Horticultural Crops. Part 1: Vegetable Crops
STUDY OF HEREDITY BREEDING AND RELEVANT SELECTION METHODS OF STRONG WINTERINESS CHINESE CABBAGE |
| Authors: | W. Wenpeng, Z. Wei, L. Jian |
| Abstract:
Over-strong winteriness individual plant that its bolting was the latest was selected from a great area seed production field of strong winteriness Chinese cabbage variety, Huang Dian Xin. Overstrong winteriness system was bred by selecting strictly for three generations. Its bolting was over 45 days later than general variety, and over 15 days later than original variety and strong winteriness variety such as Qing Ming Bai. Materials of white flower, yellow seed and over-short node were found from the strong winteriness original materials that had been collected. The result of cross experiment showed that the strongness and weakness of winteriness was quantitative character inheritance. By estimating heritability, generalized heritability was 65.2%. Youzhi No. 1, a new line of pleomorphism strong winteriness, was bred by polycross, enough crossing and recurrent selection. The yield of Youzhi no. 1 was over 53% higher than control, and compact head, high quality. Compared with Japanese variety of very strong winteriness, Chun Wang Bai and Chun Shi Bai Zao 50, bolting of Youzhi no. 1 was later for 20 days over. Different selection methods were adopted in connection with weaker morphoidentity of Youzhi no. 1, of which the result of mass-individual plant selection was the best. In check experiment of lines, some systems not only had high identity, but also obviously surpassed Youzhi no. 1 at yield, head formation and strong winteriness. The strong winteriness male sterile line which was bred by crossbreeding and recurrent selection of male sterile had high combining ability. The yield of two F1 hybrids which were produced by the line was over 16% higher than Jin Cai no. 3, F1 hybrid of major local cultivar. | |
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