Determination of morpho-physiological and yield traits of maize inbred lines (Zea mays L.) under optimal and drought stress conditions

被引:41
作者
Balbaa, Maha G. [1 ]
Osman, Hassan T. [1 ]
Kandil, Essam E. [2 ]
Javed, Talha [3 ]
Lamlom, Sobhi F. [2 ]
Ali, Hayssam M. [4 ]
Kalaji, Hazem M. [5 ,6 ]
Wrobel, Jacek [7 ]
Telesinski, Arkadiusz [7 ]
Brysiewicz, Adam [8 ]
Ghareeb, Rehab Y. [8 ]
Abdelsalam, Nader R. [9 ]
Abdelghany, Ahmed M. [10 ]
机构
[1] Field Crops Res Inst, Agr Res Ctr, Maize Res Dept, Cairo, Egypt
[2] Alexandria Univ, Fac Agr Saba Basha, Plant Prod Dept, Alexandria, Egypt
[3] Fujian Agr & Forestry Univ, Coll Agr, Fuzhou, Peoples R China
[4] King Saud Univ, Coll Sci, Bot & Microbiol Dept, Riyadh, Saudi Arabia
[5] Warsaw Univ Life Sci SGGW, Inst Biol, Dept Plant Physiol, Warsaw, Poland
[6] Inst Technol, Life Sci Natl Res Inst, Falenty, Poland
[7] West Pomeranian Univ Technol Szczecin, Dept Bioengn, Szczecin, Poland
[8] Arid Lands Cultivat Res Inst, Plant Protect & Biomol Diag Dept, City Sci Res & Technol Applicat, Alexandria, Egypt
[9] Alexandria Univ, Fac Agr Saba Basha, Agr Bot Dept, Alexandria, Egypt
[10] Damanhour Univ, Fac Agr, Crop Sci Dept, Damanhour, Egypt
关键词
maize; inbred lines; principal component analysis; drought tolerance index (DTI); morpho-physiological; yield traits; PHYSIOLOGICAL TRAITS; WATER-STRESS; TOLERANCE; GROWTH; WHEAT; RESISTANCE; RESPONSES; PROLINE; PERFORMANCE; ADAPTATION;
D O I
10.3389/fpls.2022.959203
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Globally, climate change could hinder future food security that concurrently implies the importance of investigating drought stress and genotype screening under stressed environments. Hence, the current study was performed to screen 45 diverse maize inbred lines for 18 studied traits comprising phenological, physiological, morphological, and yield characters under optimum and water stress conditions for two successive growing seasons (2018 and 2019). The results showed that growing seasons and water regimes significantly influenced (p < 0.01) most of the studied traits, while inbred lines had a significant effect (p < 0.01) on all of the studied traits. The findings also showed a significant increase in all studied characters under normal conditions compared to drought conditions, except chlorophyll content, transpiration rate, and proline content which exhibited higher levels under water stress conditions. Furthermore, the results of the principal component analysis indicated a notable distinction between the performance of the 45 maize inbred lines under normal and drought conditions. In terms of grain yield, the drought tolerance index (DTI) showed that Nub60 (1.56), followed by Nub32 (1.46), Nub66 (1.45), and GZ603 (1.44) were the highest drought-tolerant inbred lines, whereas Nub46 (0.38) was the lowest drought-tolerant inbred line. These drought-tolerant inbred lines were able to maintain a relatively high grain yield under normal and stress conditions, whereas those drought-sensitive inbred lines showed a decline in grain yield when exposed to drought conditions. The hierarchical clustering analysis based on DTI classified the forty-five maize inbred lines and eighteen measured traits into three column- and row-clusters, as inbred lines in cluster-3 followed by those in cluster-2 exhibited greater drought tolerance in most of the studied traits. Utilizing the multi-trait stability index (MTSI) criterion in this study identified nine inbred lines, including GZ603, as stable genotypes in terms of the eighteen studied traits across four environments. The findings of the current investigation motivate plant breeders to explore the genetic potential of the current maize germplasm, especially in water-stressed environments.
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页数:17
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