寒地早粳品种稻瘟病抗性与品质关系的研究

采用寒地早粳近5年参加黑龙江省区域试验和生产试验的131个品种，对稻瘟病抗性与品质诸性状的相关关系进行了研究，结果表明，寒地早粳水稻品种穗颈瘟抗性与水稻品种长宽比的相关系数为－0.1967，达到显著负相关；叶瘟、穗颈瘟抗性与水稻品种垩白大小呈显著正相关，平均相关系数分别为0.2026和0.1995；叶瘟、穗颈瘟抗性与垩白米率呈极显著正相关，平均相关系数分别为0.2276和0.2240；叶瘟、穗颈瘟抗性与垩白度除人工鉴定穗颈瘟外均呈显著正相关，叶瘟平均相关系数为0.1789，穗颈瘟平均相关系数为0.1630。叶瘟抗性与水稻品种蛋白质含量的相关系数平均为0.2159，达到显著负相关；稻瘟病抗性与水稻品种蒸煮品质、食味品质相关性因试验方法而不同，胶稠度、直链淀粉含量、食味在人工鉴定条件下存在着显著负相关性。因此，在寒地稻区选育优质、高抗稻瘟病的水稻新品种是完全可能的。

Study on Relationship between Resistance to Blast and Quality in Early Japonica Rice in Cold Region

Correlation coefficients between rice resistance to blast and qualities of 131 varieties which were tested in the region trial in the cold region in recent 5 years. The result showed: A significant negative correlation effect between resistance to blast and grain Length/Width (L/W) ratio in cold region early japonica rice varieties; A significant positive correlation effect between resistance to leaf and neck blast and chalki-ness factor included chalky grain, chalkiness and chalk size; A significant negative correlation effect between resistance to leaf blast and protein content. Leaf blast showed different relationship to steaming quality and eating quality in different experimental ways. A significant negative correlation effect to gel consistency (GC), amylose content (AC) and eating quality in artificial identification.