福建省近年育成的中籼杂交稻品种产量结构特征分析

对2005--2013年通过福建省审定的63个中籼杂交稻品种的产量结构及其构成因素间的相关进行了分析，并研究了产量与产量相关性状间的相关关系。结果表明：近年育成的中籼杂交稻品种平均产量为584．79kg／667m^2、比对照增产7．62％。产量与株高、穗长、每穗总粒数以及千粒重呈极显著正相关，而与生育期、结实率相关不显著；每穗总粒数对产量贡献率最大，其次是结实率、生育期和千粒重，再次是有效穗数。因此，在福建生态条件下，应在适宜的穗数基础上，增加每穗总粒数，适当提高结实率和粒重有利于进一步提高中籼杂交稻产量水平。

Correlation Analysis on Yield Components of Medium Indica Hybrid Rice Cultivars from 2005 to 2013 in Fujian Province

Relationship between yield and yield component of the 63 medium Indica hybrid rice cuhivars which had passed Fujian province＇ s approval from 2005 to 2013 were analyzed. The results indicated ： the average yield of medium Indiea hybrid rice cultivars was 584.79kg/667m2,the average stimulation ratio was 7.62%. The yield was very significantly positive correlated with Plant height （ PH ） , Panicle length （ PL ） , Total grain number per panicle （ TGNPP ） and 1000-grain weight （ TGW ） , and not significantly correlated with effective Growth duration （ GD ） and Seed setting rate （ SSR ） ; The greatest contribution factor was TGNPP, the second was SSR, GD and TGW, and the contribution of effective PNPP was relatively small. Therefore, under ecological condition in Fujian, it was important to get high yield weight that especially under the basis of keeping the number of the Panicle number per plant （ PNPP ） , TGNPP, SSR and TGW were increased and could enormously enhance the yield.