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从1983年起,用7个野生稻和数十个栽培稻进行杂交和回交来培育水稻新质源雄性不育系。由于人手少,许多杂交、回交和分离世代材料第一次抽穗时来不及再杂交或回交,便从中选择全不育株或高不育株留取再生稻,待以后时间充裕时进行。结果发现,随着时间的推移,相当多这样的不育或高不育中间材料的再生稻育性逐步发生了变化。变化的方向是黑染花粉渐次增多,育性渐次恢复,个别材料竟至恢复到正常的结实率。还发现种在玻璃温室里的常规早稻,由于生长
Since 1983, seven wild rice and dozens of cultivated rice were crossed and backcrossed to cultivate a new CMS line. Due to the shortage of manpower, many crossbreeds, backcrosses and segregation materials of the first generation are too late to be hybridized or backcrossed at the first heading. As a result, it has been found that, with the passage of time, a considerable number of regenerative rice fertility of such intermediate or sterile CMSs has gradually changed. The direction of change is that the number of black-stained pollens gradually increases, fertility gradually recovers, and the individual materials actually return to the normal seed-setting rate. It was also found that conventional early rice planted in glasshouses, due to growth