EFFECT OF SOME SELECTION PROCEDURES ON LINT YIELD AND SEED CHARACTERS IMPROVEMENT IN COTTON

Abstract

The purpose of this study was to obtain information regarding; (1) type of gene action, (2) both broad and narrow sense heritabilities, (3) phenotypic, genotypic and environmental vanances, (4) magnitudes of the phenotypic and genotypic correlations, (5) relative effectiveness of within and between different selection procedures in improving lint yield, (6) correlated response between selected and Wlselected traits, (7) effect of selection procedure on genetic variation, and (8) effect of phenotypic selection for seed index on oil percentage in F4 and So generations.

The present investigation was carried out at Sakha Experimental Farm, Sakha Agricultural Research Station, during 2000, 2001 and 2002 growing seasons.

Six populations experiments In 2000, the two crosses (G. 45 x G. 75) and (G. 88 x G. 89) with their six populations; Pt, P2, Ft. BCt, BCz and F2 were evaluated in two separate experiments.

The following characters were assessed:

1. Lint yield/plant (g.). 2. Bolls/plant. 3. Seeds/boll. 4. Lint/seed (g). 5. Lint percentage. 6. Seed index (g). 7. 100-seed volume (em\ 8. Seed density (g/cm\ 9. Heavy seed(%). 10. Micronaire reading. 11. Pressley index.