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Abstract The study was conducted at Demo exp. farm, Fac. Agric., Fayoum Univ., during 12/2013 and 13/2014, on 36 genotypes of hybrid origin together with 4 parental cultvaries to evaluate growth and reproductive traits. Exp. design was RCBD with three replications, where grains were sown, on 23th and 19th November, in the two seasons, in rows of 3.5m long and 25 cm apart and 5cm between plants. The culture practices recommended for growing wheat were followed. During each season, two vegetative samples (5 plants for each) were randomly taken from inner center rows plot-1 at 105 and 130 days ages to measure the growth traits. At harvest, yield and its attributes were evaluated. The results revealed significant differences among genotypes for both growth (in the two samples) and yielding traits in the two seasons. Growth trait performance at young age showed that G.17, G.3 in 1st season and G.4, G.33 and G34 in 2nd season were superior for some traits (for each). In the 2nd sample, G.35, G.34, G.17 and G.12 in both seasons and G.21 in 1st season were of advantage of some growth traits. The performance of yielding traits showed that G.3, G.17, G.24, G.30, G.32 and G.35 in both seasons and G.16 in 1st one were elite for some traits for each. Compared to other genotypes and checking CVS. Variability results represented by Vp, Vg, Ve, PCV and GCV indicated great range of variability among genotypes in regard to growth and yielding traits. Mostly, Vp of growth traits at the two ages were higher than the corresponding Vg. PCV ranged from 10.13 and 10.42 for plant height to 44.47 and 59.60 for extrusion length at young age in the two season, respectively. In the 2nd sample, PCV ranged from 7.55 and 7.62 for spike length and 25.18 for total leaf area plant-1 in 1st season and 25.57 for extrusion length in 2nd one. The corresponding GCV ranged from 9.95 and 10.33 for plant height to 44.29 and 95.30 for extrusion length at young age in both seasons. At late age, GCV ranged from 7.41 and 7.39 for spike length to 24.85 for total leaf area plant-1 in 1st season and 28.42 for extrusion length in 2nd season. Regarding yielding trait, PCV ranged from 4.19 and 4.31 for days to physiological maturity in both seasons to 23.45 for grain yield/fed in 1st season and 34.54 for straw yield in 2nd season. GCV ranged from 4.11 and 4.25 for days to physiological maturity in both seasons to 21.81 for grain yield/fed in 1st season and 32.38 for straw yield in 2nd season. Growth and yielding trait exhibited high broad sense heritability as well as acceptable genetic advance percent from means, in both seasons. |