| Inheritance of seed protein in winter and spring wheat
crosses N.M. SHAHANI, A.S. LARIK and N. CEAPOIU* Department of plant breeding and Genetics, Sind Agriculture University Tandojam, Pakistan. It is not a simple breeding goal to produce high yielding wheat lines with high protein content. The main limitations are the close negative correlation between yield and protein content (SHAHANI 1980), the polygenic inheritance of this trait (COWLEY & WELLS 1980; KERTESZ et al. 1980) and the influence of the environmental factors (CEAPOIU et al. 1975; KOUAME MIEZAN et al. 1977). The present study was, therefore, designed to study the inheritance of protein content in wheat grain and to evaluate parents, F1 and F2 populations of two different spring and winter wheats in contrasting environments. Material and Methods Two high yielding winter whest lines (F310-C3-4 and F21-76), bred at Research Institute for Cereals and Industrial Crops, Fundulea, Romania were crossed direct and reciprocal with two semidwarf spring wheat varieties Pak-70 and Tandojam-75, bred at Research Institute, Tandojam, Pakistan. Seeds of F0 hybrids were sown immediately after harvest in phytotron. Parents, F1 and F2's were grown in October, 1978 and March, 1979 using randomized block design with three replications inorder to study the biological material in two different contrasting environments. Protein content was determined by microkjeldahl method as crude nitrogen times 5.7. Data for grain protein percentage and protein per grain in miligrams were analyed statistically. Estimates of broad sense heritability and genetic advances with selection intensity of 5% were computed as follows: Heritability % = ((S2F2-S2F1)/S2F2) x 100 where, S2F1 and S2F2 are the co-variances of F1 and F2 respectively. Genetic advance was calculated after LARIK et al. (1980) and computed by the following formula: G.A. = (k) (Op) (H) |
| * Research Institute for Cereals and Industrial Crops, Fundulea, Romana. |
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