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收集不同熟期、不同类型的BT型粳稻不育系(保持系)和恢复系,对亲本分别按不同性状进行聚类,比较分析不同类型亲本配组杂种后代的性状表现,结果表明:1)不同类型亲本配组,杂种的性状一般表现为中间类型;2)亲本的抽穗期、株高对杂种单株穗数、每穗总粒数、每穗实粒数、单株产量、单株颖花量等多数产量性状无明显影响。亲本的穗粒结构对杂种的穗粒构成有明显影响,多穗型亲本间配组,杂种每穗总粒数及单株颖花量、产量潜力均较小;大穗型亲本间配组,杂种每穗总粒数及单株颖花量、产量潜力均较大;3)以多穗型不育系与大穗型恢复系配组,产量较高,是现有亲本配制杂交粳稻一种较好的配组方式;4)直立穗不育系与弯曲穗恢复系配组,杂种单株颖花量最多,产量潜力最大,而且株叶形态较好,如筛选到结实率高的组合,该配组方式的杂种具有较高的增产潜力。
The BT type japonica CMS lines (maintainer lines) and restorer lines of different maturity and different types were collected. The parents were clustered according to different traits. The traits of hybrid progeny of different types of parents were compared and analyzed. The results showed that: 1) 2) The heading date and plant height of the parents had no significant effect on the number of panicle per panicle, the total number of panicle per panicle, the number of seed per panicle, the yield per plant, Most yield traits such as flowering had no significant effect. The ear grain structure of the parents had a significant effect on the composition of the spikelets of the hybrids. The distribution of panicles between the multi-spike parents, the total grains per panicle and the spikelet per plant was small, The total number of hybrids per panicle and the number of spikelets per plant had a large potential for yield. 3) The multi-spike type and large-panicle restorer lines had the highest yield, 4) Erect panicle and panicle restorer, the hybrid plants had the highest spikelet yield, the highest yield potential, and the better plantlet morphology. For example, the combinations with high seed setting rate were selected, Hybrids of this combination have higher yield potential.