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Assiut University (2020)

Effect of drought on yield and its components in some bread wheat genotypes

Henian , Manal Mossad .

Titre : Effect of drought on yield and its components in some bread wheat genotypes

Auteur : Henian , Manal Mossad .

Etablissement de soutenance : Assiut University

Grade : Master in Agricultural Sciences 2020

Résumé partiel
This study was carried out during the two growing seasons of 2016/2017 and 2017/2018 at two locations including Assiut (Agronomy Dept. Experimental Farm (clay soil)) and El-Ghorieb (sandy calcareous soil), Faculty of Agriculture, Assiut University. This work aims to evaluate thirty two bread wheat genotypes of diverse origin under normal irrigated (six irrigations) and water stress (three irrigation) for yield and related traits. Furthermore, the physiological traits were studied i.e. proline, sugars, proteins, and amino acids. In all experiment a strip plot design with three replications was used. The results obtained could be summarized in the following : I- Performance of bread wheat genotypes at Assiut location A- Agronomical traits Separate and combined analyses of variance in the two seasons and over the two seasons revealed significant or highly significant differences between each of irrigation treatments (normal and water stress), genotypes, and irrigation x genotypes interaction for all traits agronomical, except the irrigation x genotype interaction for 100 grain weight in first season was insignificant. Plant height The water stress caused decrease in plant height in each season and over two seasons. The reduction in plant height due to water stress in the first, second and over two seasons means were 7.8, 10.7 and 9.2%, compared to normal irrigation, respectively. The tallest genotypes were Assiut 401 for normal and water stress over the two seasons. The best tolerant genotypes to drought were C138 (0.24) and C109 (0.35). Spike length Water stress cause decrease in spike length compared to normal irrigation in each and over the two seasons. The reduction due to water stress in the first, second seasons and combined means were 5.48, 11.67 and 8.53%, compared to normal irrigation, respectively. The longest spike was recorded for Sel-542 under normal and water stress irrigations. Drought susceptibility index recorded fifteen, seventeen, and nineteen genotypes were less susceptible or tolerance to drought in the first, second and over the two seasons, respectively.

Présentation étendue (EULC)

Page publiée le 21 décembre 2020