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Abstract Heterosis has long been observed in cotton, but to be of potential value, a hybrid shou’d be more be profitable them the best available commercial v<~rieties. This means that the hybrid would have to be higher yielding and probably possesses superior fiber properties. Since a cytopl8smic rn8le steri I ity and fertility restorer genes seemed to be available, the hybrid cotton production appeCtrs to be feasible. Consequently the question be raised whether the F 1 hybrid in cotton would perform better than the available commercial varieties. EC!rly mnturity in cotton hns many ndvantnges. It enables the cotton crop to develop during periods of more favor8ble weather, also it helps to fit the crop into a double-cropping pattern. Early maturity is desirable in inigated areCis , as early maturing plants are more economical in use of irrigation water than late varieties also to escape damage from boll worms. Before the initiation of any breeding program, it is necessary that |