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

• Grant number: 06/00111-3
• Support Opportunities: Regular Research Grants - Publications - Scientific article
• Start date: March 01, 2006
• End date: May 31, 2006
• Field of knowledge: Biological Sciences - Genetics - Plant Genetics
• Principal Investigator: Maria Lúcia Carneiro Vieira
• Grantee: Maria Lúcia Carneiro Vieira
• Host Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil

Abstract

The aim of this study was to estimate genetic and phenotypic parameters in a population of yellow passion fruit for determining its potential for genetic improvement, as well as to establish strategies for selection. The basic material comprises a sample of 100 F1 plants derived from a single cross between the accessions ‘IAPAR-06’ and ‘IAPAR-123’, which are genetically divergent. The experimental evaluation was performed in a 10 × 10 triple lattice design. At harvest, yield and number of fruit were evaluated, as well as other traits related to fruit quality. Results indicated that the population displays wide genetic variability, with coefficients of heritability on a genotype mean basis varying from52.6% to 83.0%. High and positive genetic correlations were detected between yield andnumber of fruit and for combinations of the traits weight, length, and width of the fruit.Negative genetic correlations were found between the soluble solids content and the othertraits. The relevance of the results from such a divergent cross to a commercial breedingprogram is discussed. (AU)