Evolutionary changes in yield and yield components of wheat cultivars grown in the Huainan region, Jiangsu province during 1970-1986
1988
Yu Shirong | Wu Zhaosu | Yang Zhuping (Nanjing Agricultural Univ. (China). Lab. of Wheat Breeding)
This study reviewed the changes in yield, ears per unit area, grains per spike and 1000 grain weight of these cultivars to know how the wheat cultivars had been improved in Huainan region during about 15 year in various yield components. Yield of wheat cultivars in the Huainan region had risen about 10-15% over the last fifteen years. The mean yield and grain weight of current cultivars were greater than those preceded ones, and they reduced grain per spike. The genetic correlation coefficients showed that grain weight was positively and highly correlated with grain yield, ears per unit area was slightly positively correlated with it. Results from this study suggested that further yield advances could be attained by combining number of ears per unit area and higher grain weight or by combining number of ears per unit area and greater number of grains per spike.
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