论文部分内容阅读
12个税型两系杂交稻组合在5个播期条件下的播始天数、株高、单株草重、谷草比、单株有效稳、每穗着粒数、实粒数、结实率、千粒重及单株粒重等10个性状进行相关及通径分析，结果表明，不仅结实率及谷草比与单株粒重的相关系数（正相关）较大，而且这2个险状对单株粒重的直接通径系数（为正值）也较大，说明现阶段提高结实率及谷草比是选育强优势税型两系杂交稻的主攻方向。对提高结实率的途径也进行了讨论。
Twelve tax-type two-line hybrid rice combinations had the highest number of days of sowing, plant height, grass weight per plant, grain-straw ratio, effective per plant, boll number per spike, 1000-grain weight and grain weight per plant were analyzed by correlation and path analysis. The results showed that not only the positive correlation between seed setting rate and grain-grass ratio and grain weight per plant was significant, Grain weight of the direct path coefficient (positive) is also large, indicating that at this stage to improve the seed setting rate and grain to straw ratio is the dominant type of tax-based two-line hybrid rice’s main direction. Ways to improve seed setting are also discussed.