期刊
PLANT GENETIC RESOURCES-CHARACTERIZATION AND UTILIZATION
卷 16, 期 5, 页码 459-468出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S1479262117000399
关键词
drought indices; transpiration efficiency; water use; wild lentils
资金
- Canada's NSERC Industrial Research Chair Program [IRCPG 395994-09]
- Saskatchewan Pulse Growers [BRE 1202]
- Global Crop Diversity Trust
Climate change forecasts point to increased frequency of droughts which may affect plant growth. For protein crops such as lentil, genetic improvement of both water use and drought tolerance is necessary. Wild lentil species are known to have evolved in drought prone areas and can be introgressed into cultivated lentil, making them candidates for the evaluation of high transpiration efficiency (TE) and drought tolerance. We assessed TE, water use and drought tolerance at the plant level for five wild lentil species and in cultivated lentil. Under fully watered and moderate drought conditions, wild lentil genotypes consumed significantly less water to fix similar or more dry matter compared with their cultivated counterparts. Under severe drought conditions, the wild lentil genotype L. ervoides IG 72815 had significantly higher TE compared with L. culinaris Eston. Lens ervoides L-01-827A, had significantly higher yield compared with all other species in the presence or absence of drought and showed significantly higher (alpha = 5%) TE under moderate drought. Drought susceptibility index was identified as a tool to identify drought-tolerant lentil genotypes grown under severe drought. The numerous small seeds of wild lentil made it difficult to estimate drought indices that are weight based and require formulae that incorporate seed numbers.
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