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University of Gezira (2018)

Genetic Variability and Yielding Ability of Selected Bread Wheat (Triticum aestivum L.) Genotypes under Winter Conditions, Gezira State, Sudan

Mahad, Ahmed Abdulkadir Salah

Titre : Genetic Variability and Yielding Ability of Selected Bread Wheat (Triticum aestivum L.) Genotypes under Winter Conditions, Gezira State, Sudan

Auteur : Mahad, Ahmed Abdulkadir Salah

Université de soutenance : University of Gezira

Grade : Master of Science (MS) in Crop Science 2018

Résumé
Wheat (Triticum aestivum L.) is the most widely grown cereal in temperate and some tropical environments but is faced with heat stress problems in the tropics. The aim of this study was to estimate the genetic variability and yielding ability of selected bread wheat genotypes under heat stress conditions, Gezira State, Sudan. The experiment was conducted by using 14 selected genotypes selected from the bread wheat cultivar ’Norin 61.’ The genotypes were grown under the natural heat stress conditions, Gezira Research Station Farm, Agricultural Research Corporation , Wad Medani, Sudan, for one season (2016/17). The experiment was laid out in an alpha lattice design with two replications and six characters (number of days to heading, number of days to maturity, canopy temperature at heading , chlorophyll content, biomass and grain yield) were measured. Results revealed that the genotypes differed significantly in all characters studied. Genotypic coefficient of variation (GCV) ranged from 1.97% (canopy temperature at heading ) to 18.94% (grain yield per ha), while phenotypic coefficient of variation (PCV) ranged between 4.34% (canopy temperature at heading ) to 29.27% (grain yield). High heritability and genetic advance were recorded for days to maturity (98.88% and 23.82% , respectively), whereas the moderate heritability and high genetic advance was observed for grain yield (41.87% and 25.25%, respectively). Genotypes MSD212 and MSD185 were early heading and maturing genotypes, while MSD63 and MSD220 were late genotypes for both characters. These genotypes can be recommended for solving the problems of early and late maturing in breeding programs. Genotype MSD156 gave the highest yield (3937kg/ha) which can be grown to increase production in the Gezira area and to be subjected for further testing in different locations and seasons to test its stability

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