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Kirubi, D.

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Kirubi
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Kirubi, D.

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    Annual research report 2000: Maize genetic resources
    (CIMMYT, 2000) Taba, S.; Remier, H.; Kirubi, D.; Diaz, J.
    Maize genetic resources program has three pillars, namely germplasm accessions management, in-situ biodiversity conservation, and prebreeding. Germplasm accessions management includes specific cooperative project ofregeneration of the Latin American maize landrace accessions, and evaluation and curatorial of the CIMMYT bank accessions. In-situ-biodiversity conservation entails the collecting and evaluation, and enhancement of specific landraces that are grown by the farmers in the context with their growing environment and cultural heritage in Mexico. Prebreeding is to develop and improve CIMMYT gene pools with incorporation of appropriate germplasm sources that are adapted in tropical, subtropical, and highland environment. For in-situ biodiversity conservation we evaluated new collections of Mexican race Zapalote Chico with our Mexican collaborators. Evaluations of additional Tuxpefio race and Brazilian races of Cateto and its subraces were conducted for development of core subsets. Formation and evaluation of breeding crosses of elite accessions were initiated or advanced in GEM type germplasm enhancement. In prebreeding topcross evaluations of a few tropical early pools, progeny formation of S 1 or S2, and development of donor sources were made mostly for yellow gene pools. Bank management and accessions introduction through the collaborative project with Latin American countries resulted in the total number of accessions that amounted to 20,863 as of September 2000. We made the seed shipment from Bank in the seed packets of 5,248 during the year.
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    Maize Genetic Resources: annual report 2002
    (CIMMYT, 2002) Taba, S.; Krakowsky, M.; Kirubi, D.
    We have completed the first cycle of RRS in the tropical and subtropical yellow gene pools. The best S2 lines were increased for seed distribution. In pool 25 and 26, to determine combining ability of the S2 lines selected by RRS, 10 best S2 were chosen to make the testcrosses with two inbred lines and the opposite pool. A half of the highland gene pools were planted and advanced to S1. Enhancement of donor germplasm sources and their testcross evaluations were performed for tropical and subtropical yellow flint and dent pools. Yellow flint and dent donor sources were developed for tropical gene pools: 17, 18, 25, and 26. Latin American germplasm regeneration project has continued, receiving the regenerated accessions from Mexico, Venezuela, Ecuador, and Peru. CIMMYT regeneration was focused on Chile, Argentine, and Brazilian accessions. Accessions evaluation was conducted with the accessions from Argentine. The regeneration and germplasm evaluation was slightly less than what was desired. Seed distribution was met as requested. The number of seed packets prepared for distribution was less as compared to those in the previous years.
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