Genetic and phenotypic parameter estimates for yield and fruit quality traits from a single wide cross in yellow passion fruit.

摘要

Genetic and phenotypic parameters in a population of yellow passion fruits were identified to determine their potential for genetic improvement as well as to establish strategies for selection. The basic material comprised a sample of 100 F1 plants derived from a single cross between the accessions IAPAR-06 and IAPAR-123, which are genetically divergent. Studies were conducted in a 10 x 10 triple lattice design. At harvest, yield and number of fruits were evaluated as well as other traits related to fruit quality (e.g. soluble solids content, average percentage of pulp, average wt. of fruits). Results indicated that the population displayed wide genetic variability with coeff. of heritability on a genotype mean basis varying from 52.6 to 83.2%. High and positive genetic correlations were observed between yield and number of fruits and for combinations of the traits wt., length and width of fruits. Negative genetic correlations were observed between soluble solids content and other traits. The relevance of results from such a divergent cross to a commercial breeding programme is discussed.