摘要
分别用自选恢复系986和JHl为材料，以5％为组距，在0-100％范围内人工构造具有不同计数结实率（cSR）的样本；称出各样本实粒质量M1和空秕粒质量M2，算出实粒质量占样本总质量的百分率，即称重结实率（WSR）；根据单粒实粒质量m1、单粒空秕粒质量m2与M1、M2，单粒实粒质量m1、单粒空秕粒质量m2与出糙率P的关系，推导出WSR与CSR的数学关系：CSR1=1/1＋m1/m2（1/WSR-1）=×100％和GSR2=（1-P）×WSR/（1-P×WSR）×100％；RSR1、RSR2分别代替两式中的CSR1、CSR2，称为回归结实率。统计和作图分析表明：WSR与实际的CSR差异极显著，但具有极显著正相关关系；回归结实率RSR1与CSR无显著差异，而RSR2与CSR有极显著差异。用称重法获得计数结实率具有可行性，可减轻结实率考查的工作量。
Using rice restorer lines 986 and JH1 as the materials, the samples with different counting seed-setting rates （CSR） from 0 to 100% with a class interval of 5% were designed to study the relation of CSR to weighing seed-setting rate （WSR）. Based on the parameters m1 （ weight/filled grain）, m2 （ weight/unfilled grain）, M1 （ total filled grain weight）, M2 （total unfilled grain weight） and P （brown rice rate）, the mathematical relation of CSR to WSR is deduced 1 as in the following formula： CSR1=1/1＋m1/m2（1/WSR-1）=×100% and GSR2=（1-P）×WSR/（1-P×WSR）×100%;. If RSR1 and RSR： are used to replace the CSR1 and CSR2, respectively, they are defined as regression seed-setting rate （RSR）. The results by statistic and mapping analysis showed that WSR was very significantly （at 1% level） different from CSR, but there was a very significant positive correlation between them; there was not a significant （at 5 % level） difference between RSR1 and CSR, but there was a very significant difference between RSR2 and CSR. It is found that it is feasible to use WSR as a substitute for CSR in selection of seed-setting rate, as a result in reducing labor intensity in rice breeding.
出处
《杂交水稻》
CSCD
北大核心
2006年第2期64-68,共5页
Hybrid Rice
基金
重庆市"十五"水稻育种攻关项目
关键词
水稻
称重结实率
计数结实率
相关
rice
weighing seed-setting rate
counting seed-setting rate
correlation
