[Estimating potential of the CIMMYT drought resistant lines in their crossings with the other lines] | Estimacion del potencial de rendimiento de lineas resistentes a sequia del CIMMYT en cruzamientos con diferentes probadores
1997
Garcia V., M.A.
Two experiments provided by ClMMYT were planted in the 1995 rainfed spring-summer season at the Ameca, Jalisco experiment station of the Biological and Agro-livestock Sciences Center, University of Guadalajara. The first experiment was a yield test of S5 topcrosses of Tuxpeno lines (TS6C1) and La Posta SeqC3 (UNG95B-5935D). The second included an isolated group of single-cross and three-way hybrids with Tuxpeno and La Posta lines (UNG95B 5934E), in both cases with drought resistance. Based on the results, one can conclude that: (1) the lines with La Posta germplasm yielded better when crossed than the lines with Tuxpeno germplasm, possibly because the testers in the first experiment (CML247 and CML254) are Tuxpeno-related materials; (2) there were no line x tester interactions, which indicates that either of the two testers (CML247 and CML 254) can be used to select for combining ability between the Tuxpeno and La Posta drought-tolerant lines, at least in this area; (3) the lines that showed the greatest tendency towards combining ability in the two experiments were La Posta SeqC3-H297-2-1-1-1-B and La Posta SeqC3-H297-2-1-1-2-B, and it is recommended that these be used immediately and intensively in hybridization programs to incorporate drought tolerance into commercial hybrids.
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