ISHS Acta Horticulturae 402: International Symposium on Cultivar Improvement of Horticultural Crops. Part 1: Vegetable Crops
INHERITANCE OF AND UTILIZATION MODEL FOR GENIC MALE STERILITY IN CHINESE CABBAGE (BRASSICA PEKINENSIS RUPR.) |
| Authors: | F. Hui, W. Yutang, Z. Shuning |
| Keywords: | Chinese Cabbage, genic male sterility, inhibiting gene, modifying gene |
| Abstract:
Four stable hereditary lines with 100% male sterility and male sterile plants of chinese cabbage were obtained from crossing male sterile plants with male fertile plants between AB lines. Genetic analysis revealed that male sterility was controlled by two pairs of major genes and a series of minor genes. The dominant gene "Ms" was able to induce the plant to produce male sterile factors causing the stamen to degenerate; the dominant inhibiting gene "I" prevented the expression of the "Ms" gene; the minor genes were modifying factors strengthening or weakening the expression of major genes; homozygosis of the modifying factors was beneficial to male sterility, and heterozygosis was beneficial to male fertility. The genotype of original male sterile plant was "MsMsii", which was reproduced by siblings in and AB line. The genotype of maintainer line was "msmsii". As the original male sterile plant crossed with the maintainer line, a male sterile line was produced. For hybrid seed production, three to five isolated plots were needed to reproduce the male sterile line and to produce hybrid seeds each year. Hybrids produced under this model were actually three-way cross varieties, and the male sterile lines were F1. The male sterile lines grew vigorously and were able to yield high quality seeds. In addition, parents of the hybrids were easily controlled by breeders. | |
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