Cultivar Differences in Leaf Photosynthesis and Grain Yield of Wheat under Soil Water Deficit Conditions

Japanese Journal of Crop Science

Michihiro WADA¹  Gustavo C. RODRIGUES¹  Luiz J.C.B. CARVALHO¹  Ryuichi ISHII¹ 

关键词: Cultivar difference;    コムギ;    Drought;    個葉光合成速度;    Grain yield;    収量;    Photosynthesis;    土壌水分欠乏;    Soil water deficit;    品種間差;    Triticum aestivum L.;    水利用効率;    Water use efficiency;    Wheat;   

DOI  :  10.1626/jcs.63.339

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Cultivar differences in leaf photosynthesis (LPS) and grain yield of wheat [Triticum aestivum L.] were examined under irrigated and non irrigated conditions in Cerrados, a semi-arid region in Brazil. Twelve Brazilian, five Mexican and two Japanese cultivars were used in this project. The plants were grown under low planting density to elucidate the relationship between LPS and the potential yield of an individual plant. Brazilian cultivars ranked high in LPS, followed by Mexican and Japanese cultivars under non-irrigated conditions, although there were practically no differences in LPS among these three groups of cultivars in irrigated conditions. The LPS showed a significant positive correlation with grain yield (r=0.63) and dry matter yield (r=0.73) per plant in non-irrigated conditions. However, LPS showed neither correlation with grain yield nor dry matter yield per plant in irrigated conditions. The present results suggests that PLS could be a breeding criteria to increase the yield per plant under soil water deficit conditions.

【 授权许可】

Unknown