关键词: 水稻 核心种质 理想模式

Abstract:

Agronomic traits and eating quality of core rice germplasm Meixiangzhan 2 and its pedigree grown in early and late seasons in Guangzhou areas were studied. Ideal mode of core germplasm Meixiangzhan 2 and its pedigree was put forward according to the results gained from regional trials in Guangdong Province. The results showed that eating quality was significantly positively correlated to productive panicle numbers per plant, while significantly negatively associated with the width of the 2^rd top leaf, its yield was significantly negatively correlated with the width of the 2^rd top leaf and extremely significantly negatively correlated to the width of the 3^rd top leaf. The yield will increase 6.01 units, as the factor of flag leaf width increases 1 unit. In early season selection at Guangzhou areas, in order to improve the yield of Meixiangzhan 2 and its pedigree and their eating quality, attention must be paid to select plant with more effective spike numbers, wider top leaf width and single plant with dense grain numbers per panicle. For late season crop, eating quality was significantly negatively correlated to the widths of flag leaf and the 3^rd top leaf. The yield will increase 5.41 units as the factor of spikclet density per panicle increase 1 unit. Therefore, in order to comprehensively improve the yield of Meixiangzhan 2 and its pedigree and their eating quality, attention must be paid to select plant with larger panicles, heavy spikelet density per panicle and slender flag leaf and 3^rd top leaf for late season at Guangzhou areas

Key words: rice , core germplasm , ideal mode