杂交水稻品质性状间及品质性状与农艺性状间相关性研究

采用5个不育系(湛A、双青A、万金A、22A、珍汕97A)、5个恢复系(R128,R122,R46-1,R15,直龙)按5×5NCII遗传设计杂交配制25个杂交组合。在2005年晚季对杂种F1的农艺性状及品质性状进行相关性分析。结果表明:①糙米率、精米率、整精米率与其他品质性状间的相关系数均未达到显著水平;整精米长宽比与整精米长呈极显著正相关,与整精米宽呈极显著负相关;垩白粒率与整精米长、整精米长宽比、垩白面积间呈极显著负相关,但与整精米宽及垩白度间呈极显著正相关;蒸煮品质与其他品质性状间的相关性不是很密切,但直链淀粉与糊化温度呈极显著负相关,与蛋白质含量呈极显著正相关。②株高、有效穗数与各品质性状间的相关性不是很强,除株高与整精米率达到极显著外其他性状间均未达到显著水平;穗长与整精米宽、垩白粒率间均呈极显著、显著负相关,但与整精米长宽比呈显著正相关;粒长与垩白粒率间、粒宽与垩白面积间、粒长宽比与垩白粒率间均呈极显著负相关,而粒宽与垩白粒率则呈极显著正相关。

Study on Correlation of Quality Characters and between Quality Characters and Agronomic Characters of Hybrid Rice

Five male sterile lines(Zhan A,Shuangqing A,Wanjin A,22 A,zhenshan 97A)and five restorers(R128,R122,R46-1,R15,Zhilong)were selected.Twenty-five Hybrid rices were made by incomplete diallete cross(NCII)design.The correlation of quality characters and between agronomic characters and quality characters of Hybrid F1 was analyzed in the late season of 2005.The resultes were as follows:① The coefficients of correlation between brown rice rate、milled rice rate、head rice rate and other quality characters weren't reach to the level of significant.The coefficient of correlation between kernel length/width and kernel length was extremely positive significantly,while and kernel width was negative significantly at 1 % level.The coefficients of correlation between chalk rice rate and kernel length、kernel length/width、chalk rice area were negative significantly at 1 % level,while and kernel width、chalk rice grade were positive significantly at 1 % level.The coefficients of correlation between cooking characters and other quality characters weren't significant,while the coefficient of correlation between amylose content and gelatification temperature was negative significantly at 1 % level,and protein content was positive significantly at 1 % level.② The relationships between plant height、panicles per plant and quality characters weren't high.Except the coefficient of correlation between plant height and head rice rate was positive significantly at 1 % level,the coefficients of correlation of the others characters weren't reach to the level of significant.The coefficients of correlation between spike length and kernel width,chalk rice rate were negative significantly at 1 % or 5 % level,while and kernel length was positive significantly at 5 % level.The coefficients of correlation between length of rice and chalk rice rate,width of rice and chalk rice area,and rice length/width and chalk rice rate were negative significantly at 1 % level,while width of rice and chalk rice rate was positive significantly at 1 % level.