江苏省直立穗型粳稻品种主要农艺性状和品质性状分析

通过对江苏省淮北稻区种植的主要粳稻品种品质状况和近十年来育成的直立穗型粳稻品种(系)主要品质和农艺性状的分析,发现前期育成直立穗型粳稻品种相时半直立穗型粳稻品种加工品质低,垩白率高和垩白度大,蛋白质含量高;而近期育成直立穗型粳稻品种在上述品质指标上有了较大改进,食味品质也有了显著提高.在主要农艺性状中,近期育成品种呈现每穗总粒数上升、穗长变长、着粒密度下降趋势,产量水平的提高与每穗粒数的增加有着紧密相关.

Analysis of Main Quality Characters and Agronomical Characters of Erect-panicle Japonica Varieties in Jiangsu Province

The grain quality status of japonica varieties and agronomic and grain quality characters of erect panicle typical japonica varieties bred in the recent 10 years in Huaibei region in Jiangsu province were analyzed. The results showed that erect panicle japonica varieties which were bred in early stage showed low process quality, high chalkiness rate and large chalkiness degree, and rather high protein content. But these grain quality characters were improved in recent breeding, and taste quality also was changed. There were the trends that total grain numbers per ear increased, grain density decreased, ear lengthened in recent bred varieties. The main factor resulting in the high yield was that grain numbers per ear increased.