Evaluation of Drought Tolerance in Maize Inbred Lines Selected from the Shaan A Group and Shaan B Group

Yonghui Lao, Yuan Dong, Yaqin Shi, Yahui Wang, Shutu Xu, Jiquan Xue and Xinghua Zhang
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Yonghui Lao: The Key Laboratory of Biology and Genetic Improvement of Maize in Arid Area of Northwest Region, Maize Engineering & Technology Research Centre, Ministry of Agriculture and Rural Affairs, College of Agronomy, Northwest A&F University, Xianyang 712100, China
Yuan Dong: The Key Laboratory of Biology and Genetic Improvement of Maize in Arid Area of Northwest Region, Maize Engineering & Technology Research Centre, Ministry of Agriculture and Rural Affairs, College of Agronomy, Northwest A&F University, Xianyang 712100, China
Yaqin Shi: The Key Laboratory of Biology and Genetic Improvement of Maize in Arid Area of Northwest Region, Maize Engineering & Technology Research Centre, Ministry of Agriculture and Rural Affairs, College of Agronomy, Northwest A&F University, Xianyang 712100, China
Yahui Wang: The Key Laboratory of Biology and Genetic Improvement of Maize in Arid Area of Northwest Region, Maize Engineering & Technology Research Centre, Ministry of Agriculture and Rural Affairs, College of Agronomy, Northwest A&F University, Xianyang 712100, China
Shutu Xu: The Key Laboratory of Biology and Genetic Improvement of Maize in Arid Area of Northwest Region, Maize Engineering & Technology Research Centre, Ministry of Agriculture and Rural Affairs, College of Agronomy, Northwest A&F University, Xianyang 712100, China
Jiquan Xue: The Key Laboratory of Biology and Genetic Improvement of Maize in Arid Area of Northwest Region, Maize Engineering & Technology Research Centre, Ministry of Agriculture and Rural Affairs, College of Agronomy, Northwest A&F University, Xianyang 712100, China
Xinghua Zhang: The Key Laboratory of Biology and Genetic Improvement of Maize in Arid Area of Northwest Region, Maize Engineering & Technology Research Centre, Ministry of Agriculture and Rural Affairs, College of Agronomy, Northwest A&F University, Xianyang 712100, China

Agriculture, 2021, vol. 12, issue 1, 1-11

Abstract: Drought is one of the most prevailing abiotic stresses affecting the growth, development, and productivity of maize. Knowledge of drought tolerance could help in maize improvement. However, less research has been done to comprehensively evaluate the drought tolerance of maize inbred lines. We used 27 elite maize inbred lines selected from Shaan A group and Shaan B group breeding populations to estimate their drought tolerance in 3 years 2 locations under normal field conditions and low irrigation. Using principal component analysis (PCA) and GGE biplots, all inbred lines, including the controls, could be divided into four types. Ten lines could be categorized as the high-yield drought-resistant type (‘KB081’, ‘KA105’, ‘KB417’, ‘KB215’, ‘KB-7’, ‘2013KB-37’, ‘KA203’, ‘2012KA-34’, ‘KA225’, and ‘91227’) because of their stability and wide adaptability. Compared with the controls, a large proportion of the inbred lines selected from Shaan A and Shaan B breeding populations demonstrated higher drought resistance. Our results suggest that multi-year drought screening can be used as a tool to improve the drought resistance of maize inbred lines and provide a scientific basis for making better use of the Shaan A and Shaan B maize inbred lines to breed new varieties and to identify existing drought-resistant maize varieties.

Keywords: maize; indices of drought tolerance; drought tolerance index; GGE-biplot (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2021
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