Browsing by Author "Eberhart, S. A."
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Item Preliminary results from maize breeding method study in Kenya(1973) Darrah, L. L.; Penny, L. H.; Eberhart, S. A.Preliminary results show that rapid improvement has been made in one of the parental varieties, in the commercial variety-cross hybrid by four years’ of reciprocal recurrent selection. The current commercial hybrids, H611C and H613C, yield approximately 25 per cent more that the original version.Item Recent advances in maize research an a global scale(1973) Eberhart, S. A.The serious outbreak of the new "T" race of Helminthosporium maydis in the U.S.A.has emphasized the need to maintain both cytoplasmic and genetic diversity among our commercial varieties. The Comprehensive Breeding System adopted by Eastern African maize breeders is designed to maintain genetic diversity as well as to continually develop improved varieties. The three major phases are: (I) Developing breeding populations from locally adapted material, from germplasm in the centre of origin of maize in Central and South America, and from improved maize varieties developed throughout the world; (2) population improvement by efficient recurrent selection methods; and (3) efficient extraction of improved open-pollinated varieties, varietycross hybrids, or conventional hybrids for release as commercial varieties.Item Recurrent Selection in Sorghum(1968) Doggett, H.; Eberhart, S. A.Genetic male sterility is an important tool that permits the recurrent selection methods developed and used so successfully for maize to be applied to other crops. A breeding system utilizing recurrent selection has been initioated at Serere for sorghum (Sorghum bicolor L. Moench.) using Coes male sterility (msa). A detailed description of this breeding system is given including the compositing of the two breeding populations, the recurrent selection method used, and the subsequent development of hybrid varieties using the cytoplasmic male-sterility and restorers.
