关键词: 免耕, 免耕

Abstract: Panicle is one of the important factors for rice yield improvement, therefore, research works concerning panicle related characters have been paid wide attention. In order to understand the rice panicle traits in depth and provide the basis for new varieties breeding, 3 typical maintainer lines cultivars applied in the production in Jiangxi Province were studied by using ‘Zhenshan 97B’ as check in this study. The results revealed that, 99B, ‘XinluB’ and 146B increased significantly for panicle number, primary branch number and secondary branch number. The most pronounced increase were panicle number and secondary branch number, averaged as 13.1% and 27.5% respectively. But the panicle length increased or decreased compared with ‘Zhenshan 97B’, which indicated that the researchers pay more attention on panicle related traits in Jiangxi rice maintainer lines breeding program in recent years, more tillering and large panicle was chosen as the focus. Correlation analysis showed that, panicle number was significantly positively correlated with primary and secondary branch number, and the correlation coefficient was respectively 0.88 and 0.79, indicated that panicle number played an important role in branch number improvement and that the contradiction between more tillering and large panicle could be broken through breeding selection. Panicle length was significantly negative correlated with branch number and primary and secondary branch number, and correlation coefficient was respectively -0.75, -0.43 and -0.59, which indicated that there was contradiction between panicle length and branch number and panicle number, therefore the panicle length was an important condition to ensure the more tillering and large panicle formation.