【摘要】 采用去雄杂交鉴定、遗传分析,对高梁(Sorghum bicolor L.Moench)SSA-1无融合生殖系的自主结实特性,无融合生殖频率及其遗传行为进行了鉴定分析。研究结果表明SSA-1具有自主结实特性,其自主结实频率为13.3％～32.7％。自主结实受两对隐性基因控制,无融合生殖频率为25.5％～52.2％,为典型的兼性无融合生殖类型。该系无杂交不孕性,无融合生殖表达不受授粉方式、父本类型等因子的影响,是目前无融合生殖研究以及固定杂种优势的良好基础材料。更多还原

【Abstract】 Various research methods including crossing test, progeny test and embryoge-nesis test were used to study the autonomous seed setting property of sorghum apomictic line SSA-1. The results indicated that SSA-1 has no pollen abortion, no cross sterility in the sexual spiklet and has the property of autonomous seed setting. Freqency of autonomous seed set is 13. 3%-32.7%. Autonomous seed setting is controlled by two recessive genes. The frequency of apomixis is 25. 5%-52.2%, indicating facultative apomictic property, SSA-1 was observed no crossing sterility. The frequency of apomixis of SSA-1 was not dependent upon factors such as methods of pollination or types of pollinator. It is therefore a good material for apomixis studies and the fixation of heterozygosity.更多还原