Phenotypic and molecular selection of yellow passion fruit progenies in the second cycle of recurrent selection

• Main Authors: Ronaldo Viana dos Reis, Alexandre Pio Viana, Eder Jorge de Oliveira, Marcelo Geraldo de Moraes Silva
• Format: Article
• Language: English
• Published: Brazilian Society of Plant Breeding 2012-01-01
• Series: Crop Breeding and Applied Biotechnology
• Subjects: breeding; Passiflora edulis; microsatellite markers; genetic variability
• Online Access: http://www.sbmp.org.br/cbab/siscbab/uploads/c8eb9792-871a-50a7.pdf

The purpose of this study was to evaluate the efficiency of selection of a population of yellow passionfruit in the second cycle of recurrent selection, based on molecular and agronomic data. In 39 full-sib progenies,genotyped using microsatellite markers, 11 agronomic traits were evaluated. The progenies were selectedbased on the genetic distance matrix and the selection efficiency was confirmed based on the most importantagronomic traits of yellow passion fruit. Only 12 of the 25 best progenies were identified by all three selection strategies (agronomic, molecular and combined selection). No significant correlation was observed between the genetic distance matrices and the molecular x agronomic data. The progenies selected by molecular markers had the highest mean yield and fruit number. Results indicate the possibility of applying this combined selection procedure based on agronomic as well as molecular data to optimize genetic gain for the traits under selection.