Classification of male sterile cytoplasms in rice by their nuclear-cytoplasm interactions
1989
Wan, B. | Li, D. | Xuan, Q. (Guangxi Rice Research Inst., Nanjing, Guangxi (China))
Group 1 consisted of Chao-Yang 1A which exhibits five kinds of heterocytoplasm, whose B line is sporophytic male sterile, and whose pollen aborts early. Group 2 was Fu-You 1A, which exhibits four kinds of cytoplasm, whose B line is gametophytic male sterile, and whose pollen aborts late. Plant height and internode length were affected by sterility, but not by cytoplasm. The A line exhibits more dwarfism than its B line. Dwarfism of the sporophytic male sterile is more obvious than in the gametophytic male sterile. Dwarfism in sporophytics is caused mainly by curtailment in the growth of 1st and 2nd internodes, but of only the first internode in gametophytics. Panicles per plant is mainly affected by sterility; the A line has more panicles than the B line. Sterility and cytoplasm affect days from seeding to heading and head node length. Growth duration of the A line exceeds that of the B line. And the A line is more likely to exhibit partly exserted panicles than the B line. The effect of sporophytic male sterile on duration from seeding to heading and partly exerted panicles is more pronounced than that of the gametophytic male sterile. The cross of the A line of heterocytoplasm-monokaryon and homocytoplasm heterokaryon showed that cytoplasm controls the restorer-maintainer type, and that the nucleus controls the degree of restoration.
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