Abstract
The development of maize hybrids with drought tolerance is one of effective approaches to reducing the yield loss caused by drought. However, there have been no systematic studies on screening criteria for drought tolerant maize hybrids for long. According to the specific objectives and requirements of breeding and germplasm evaluation for drought tolerance, it was proposed in this study that the criteria for breeding and germplasm evaluation could be different. After grain yields of 121 maize hybrids under different water regimes were analyzed and the features of different screening criteria were compared, it was found that for screening hybrids with drought tolerance and high yield potential, drought tolerance index for varieties (DTIv=Yd×Yw)/Ymw2) is a good alternative, and for germplasm evaluation for drought tolerance, drought tolerance index for germplasm [(Yd/Yw)×(Ymw/Ymd)]which is derived from the coefficient of drought tolerance (Cd=Yd/Yw) is a good choice.
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Claims 2
Claim · model-written summary
For screening maize hybrids with drought tolerance and high yield potential, the drought tolerance index for varieties (DTIv) is a good alternative.
Verbatim
e1“for screening hybrids with drought tolerance and high yield potential, drought tolerance index for varieties (DTIv=Yd×Yw)/Ymw2) is a good alternative”
e2“After grain yields of 121 maize hybrids under different water regimes were analyzed”
Claim · model-written summary
For germplasm evaluation of drought tolerance in maize, the drought tolerance index for germplasm is a good choice.
- Outcome
- drought tolerance index for germplasme3
- Qualifier
- for germplasm evaluation for drought tolerancee3
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The development of maize hybrids with drought tolerance is one of effective approaches”
e3“for germplasm evaluation for drought tolerance, drought tolerance index for germplasm [(Yd/Yw)×(Ymw/Ymd)]which is derived from the coefficient of drought tolerance (Cd=Yd/Yw) is a good choice”