Correlation matrix and path analysis for yield attributes in rice under various establishment methods

Abstract

Yield attributing characters were studied for correlation and regression analysis. The aims were to determine the relationship existing between grain yield and other yield attributing characters so as to identify the plant characters that could serve as good yield components to improve rice yield under different rice crop establishment methods. Total tiller density had positive and significant association with number of effective tillers under all the methods of establishment of rice crop. But, dry matter accumulation had negative association with grain yield under direct seeded rice due to accumulation in the stem before grain filling and poor translocation of photosynthates from the source to the sink. Total tiller density, 1000 grain weight and filled grains per panicle contributed the maximum to grain yield under direct seeded rice, non-puddled transplanted rice and puddled transplanted rice, respectively.