Studies on wheat [Triticum aestivum] varietal differences with regard to tolerance to deep sowing, 2: Effect of low soil moisture on grain weight and its distribution
1998
Matsui, T. (Tottori Univ. (Japan)) | Inanaga, S. | Shimotashiro, T. | Sugimoto, Y.
Varietal differences in grain weight and its distribution were investigated under different soil moisture conditions for five wheat varieties, including a deep sowing tolerance variety, Hongwangmai. Grain yields of all varieties wee significantly reduced with decreasing soil water content. The most drought tolerant variety was Hongwangmai, because it had the highest yield under low soil moisture conditions. Varietal differences in grain yield under low soil moisture conditions were mainly attributed to differences in the number of grains and harvest index. There were varietal differences in the distribution curve of grain weight. The grain weights of the varieties except for Hongwangmai were significantly reduced by soil moisture stress. Hongwangmai was the only variety in which the standard deviation of the distribution curve of grain weight decreased under low soil moisture. In conclusion, of the five varieties, Hongwangmai was found to be the best variety which produces many grains to be of uniform weight under different soil moisture conditions
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