Potential of selection among and within potato clonal families
Velci Queiroz de Souza, Arione da Silva Pereira, Roberto Fritche Neto, Giovane Olegário da Silva, and Antônio Costa de Oliveira
Objective of this work was to estimate genetic parameters among and within potato clonal families for tuber yield, average tuber weight, tuber appearance and chip color. Twenty families were evaluated in spring 2003 and fall 2004 on the experimental field of Embrapa Clima Temperado, Pelotas, state of Rio Grande do Sul, Brazil. A randomized complete block design with three replications was used. The experimental unit consisted of ten clones represented in five plants each. ANOVA revealed significant differences among and within families for all traits, except for the genotype x growing season interaction. Two families had a superior mean and only one superior variance. The heritability and selection gain estimates among families were higher than within families for tuber appearance, average tuber weight and tuber yield. Only for chip color, heritability and selection gain the estimates among families were similar to the population estimates.