不同类型水稻产量组分研究

A COMPARAITVE STUDY OF YIELD COMPONENTS OF VARIOUS TYPES OFRICE

典型籼、偏籼、中间、偏粳和粳型水稻产量构成既有相似性又有差异性。各类单株生物与经济产量呈显著正相关。各类型的性状与经济产量的量和质存在差异,各性状对经济产量的作用方式、大小、性质等也有所不同。作用于经济产量的途径,籼型以生物产量、千料重为主,偏籼型以每穗粒数和着粒密度为主,中间型以有效穗、千粒重、着粒度为主,偏粳型以收获指数、每穗总粒数、着粒密度为主,粳型则以收获指数为主。

An analysis of yield contributing factors of typical indiica, partial indica, intermediate, partial. japonica and typica.japonica rice varieties revealed that the biological yield and economic yield per plant of various types of rice are significantly correlated, whereas differences are present in the mode, extent and nature of the action of these characters on economic yiled. Path analysis showed that biological yiled and 1,000-grain-weight contribute most to grain yield of indica varieties, spikelets/panicle, and grain density on the panicle contribute most to partial indica varieties, and for intermediate, partial japonica and typicall japonica types, the main yiled con tributors are productive panicles/hill, 1000-grain-wcight, and grain density; harvest index, grains/panicle and grain density; and harvest index, respectively.