杂交水稻蓄留再生经济性状及其相关性研究

考察了9个杂交水稻头季稻与再生稻的经济性状和产量,分析了它们之间的相关性.结果表明,除头季稻有效穗组合间差异不显著外,其它经济性状包括头季稻每穗总粒数、结实率、千粒重,再生稻有效穗、每穗总粒数、结实率、千粒重组合间差异显著;头季稻产量、再生稻产量组合间差异显著;头季稻产量与头季稻结实率、千粒重呈正相关,再生稻产量与再生稻每穗总粒数、结实率呈正相关;再生稻千粒重与头季稻结实率呈显著正相关;再生稻每穗总粒数、千粒重分别与头季稻每穗总粒数、千粒重呈正相关.

Yield components and their correlations of hybrid rice in main and ratooned crops

Yield and its components of 9 hybrid rice combinations were investigated in main and ratooned crops and their correlations were analysized. The results showed that the all the characters except effective panicle number in main crop, in cludlng total grains per panicle, seed set, and 1000-grain weight in the main crop and effective panicle number, total grains per panicle, seed set and 1000-grain weight in the retooned crop had a significant difference among the combinations, so did the yield. The yield is positively correlated with seed set and 1000-grain weight in the main crop, and with total grains per panicle and seed set in the ratooned crop. The 1000-grain weight in the ratooned crop is positively correlated with seed set in the major cropat a significant level. There was a positive correlation in total grains per panicle and 1000- grain weight between the main and the ratooned crops.