Inheritance of oil and protein characteristics in two Egyptian cotton crosses [Egypt]
1988
El-Agamy, A.I. (Azhar Univ., Cairo (Egypt). Faculty of Agriculture) | Okaz, A.M. | Abdalla, A.F. | Gomaa, M.
Inheritance of oil and protein characteristics in two Egyptian cotton crosses: Cross 1 (Ashmouni x Giza 45) and cross II (Giza 45 x Giza 70) were studied in three seasons; 1979, 1980 and 1981. In each cross the six populations: P1,B1;F1;F2,B2, and P2 were used. Seven characters were studied seed cotton yield/p, seed yield/p, seed index seed oil content %, seed oil index, seed protein content and seed protein index. Heterotic deviation was significant in the two crosses for all characters except for seed index in cross 1 and for seed oil index in cross 11. Inbreeding depression was significant in the two crosses for most characters. Significant epistasis for seed protein index in cross 1 and seed protein content in cross II was found. The two crosses showed significant genetic variance in all studied characters except for seed cotton yield and seed yield in cross 1. Most of the genetic variance was due to the additive effects of genes controlling most of the studied characters. Heritability estimates and percentages of the expected genetic advance for oil and protein content were high in the two crosses. It could be concluded that there is good chance to make selection in F2 segregations to improve both protein and/or oil contents.
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