Evaluacion de lineas de avena en una sola repeticion.
1993
Sahagun Castellanos Jaime
Spanish; Castilian. Dada la importancia de ahorrar recursos en la evaluacion de genotipos, se planeo un estudio con el fin principal de conocer la eficiencia de la comparacion de lineas de avena, utilizando una en relacion a dos repeticiones. Se usaron dos poblaciones de 529 lineas de avena F5 derivadas en la F3 de dos fuentes geneticas. Cada poblacion se ensayo en un experimento con dos repeticiones en cuatro ambientes. Los criterios utilizados para medir la eficiencia fueron: correlaciones con los valores genotipicos, ganancias producidas por la seleccion y porcentajes de lineas superiores retenidas. Los resultados indicaron que es posible realizar una seleccion eficiente cuando la evaluacion se hace en una sola repeticion y que resulta mas importante el seleccionar un ambiente adecuado y un material genetico favorable que el realizar la evaluacion en una o en dos repeticiones.
Show more [+] Less [-]English. Because of the importance of saving resources devoted to genotypic evaluation, an study was designed to measure the efficiency of the evaluation in one in relation to two replicates, of 529 F5 derived lines of oats from each of two populations in F3. The evaluation of each population was conducted in an experiment with two replicates in four environments. The criteria used to measure the efficiency were: correlations with the genotypic values, genetic gains from selection, percentages of superior lines that were retained when discard of lines was practiced which indicated that: selection was efficient on the basis of one replicate and that success from selection was more dependent upon the genetic material being tested and the type of enviromment than from the number of replicates.
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