Early selection of bread wheat genotypes using morphological and photosynthetic attributes conferring drought tolerance
文献类型： 外文期刊
作者： Ahmed, Hafiz Ghulam Muhu-Din 1 ; Khan, Abdus Salam 1 ; Li Ming-ju 2 ; Khan, Sultan Habibullah 3 ; Kashif, Muhamm 1 ;
作者机构： 1.Univ Agr Faisalabad, Dept Plant Breeding & Genet, Faisalabad 38000, Pakistan
2.Yunnan Acad Agr Sci, Inst Agr Environm & Resources, Kunming 650205, Yunnan, Peoples R China
3.Univ Agr Faisalabad, Ctr Agr Biotechnol & Biochem, Faisalabad 38000, Pakistan
关键词： drought; photosynthesis; chlorophyll; wheat; seedling; carotenoid
期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：2.848； 五年影响因子：2.979 ）
ISSN： 2095-3119
年卷期： 2019 年 18 卷 11 期
页码：
收录情况： SCI
摘要： Genetic diversity is the base of any genetic improvement breeding program aimed at stress breeding. The variability among breeding materials is of primary importance in the achievements of a good crop production. Herein, 105 wheat genotypes were screened against drought stress using factorial completely randomized design at seedling stage to determine the genetic diversity and traits association conferring drought tolerance. Analysis of variances revealed that all the studied parameters differed significantly among all genotypes, indicating the significance genetic variability existed among all genotypes for studied indices. The 10 best performance genotypes G1, G6, G11, G16, G21, G26, G39, G44, G51, and G61 were screened as drought tolerant, while five lowest performance genotypes G3, G77, G91, G98, and G105 were screened as drought susceptible. Root length, chlorophyll a, chlorophyll b, and carotenoid contents were significantly correlated among themselves which exhibited the importance of these indices for rainfed areas in future wheat breeding scheme. Shoot length exhibited non-significant and negative association with other studied traits, and its selection seems not to be a promising criteria for this germplasm for drought stress. Best performance genotypes under drought stress conditions will be useful in future wheat breeding program and early selection will be effective for developing high yielding and drought tolerant wheat varieties.
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