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利用人工控制光周期程序(简称SPAC)处理或在北京自然长日下栽培,考察了15个群体的自交结实率和正常花粉率频率分布,得到了如下结果。 1.F_1的育性正常。F_1群体的表现型值呈双峰连续分布。分离出1个无法准确划分的“败育群”;2.在F_2的“败育群”或农垦58原种S群体内,雄性彻底败育的个体只是少数,其余多数个体败育不完全,表现型值各不相同,在低值端呈连续分布;3.由F_1选出的光敏感雄性不育单株繁衍来的F_4家系群体,其表现型值依然分离,在低值端呈连续分布。雄性完全败育个体的比例在各家系、株系、甚至同一株系内的植株间存在差别;4.仅F_4家系群体中的1个株系。农垦58S或鄂宜105S群体内表现型值基本一致,雄性彻底败育了。作者认为,连续分布是水稻光敏感雄性不育初级群体表现型值分布的普遍形式。它多半产生于修饰基因分离、重组造成的基因型值的连续变异。
Using artificial controlled photoperiodic program (referred to as SPAC) processing or natural long-day cultivation in Beijing, self-fertility and normal pollen frequency distribution of 15 populations were investigated. The following results were obtained. 1.F_1 is fertile. The phenotypic values of F_1 population showed a bimodal distribution. 1 “abortion group” can not be divided accurately; 2.In the “abortion group” of F_2 or the original S group of Nongken 58, there are only a few male abortion individuals completely, The phenotypic values were different, and were continuously distributed at the low-value end. (3) The F 4 lineage derived from the light-sensitive male sterile plants selected by F 1 had their phenotypic values still separated and continuously distributed at the low value end . There is a difference between the male and female abortion individuals in all the families, strains and even the plants in the same strain; 4. Only one strain in the F4 family. Nongken 58S or E-Yi 105S population within the phenotypic values of the same, the male completely aborted. The authors believe that the continuous distribution is a common form of phenotypic value distribution in the light-sensitive male sterile primary population. It mostly results from the continuous variation of genotype values caused by the separation and recombination of modified genes.