水稻育种的最终目标是培育高产多抗优质等具有多种功能的新品种,其中高产是前提。构成产量的主要因素是穗数和穗重,而穗数、穗重又与穗粒数、结实率、粒重、株高密切相关。究竟怎样的穗粒结构和群体结构表现高产呢?六十年代矮化育种成功,多穗型品种在生产上作出了重大贡献,七十 The ultimate goal of rice breeding is to cultivate new varieties with multiple functions such as high yield, multiple resistance and high quality, among which high yield is the prerequisite. The main factors that make up the yield are panicle number and panicle weight. Panicle number and panicle weight are closely related to grain number, seed setting rate, grain weight and plant height. What kind of ear grain structure and population structure of high yield it? Sixty dwarf breeding success, multi-spike varieties have made a significant contribution to the production, seventy