SciELO - Scientific Electronic Library Online

 
vol.79 issue2Effect of phenological phase of dry grazing pasture on fatty acid composition of cows’ milkTranscriptome analysis of hot pepper plants identifies waterlogging resistance related genes author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

  • On index processCited by Google
  • Have no similar articlesSimilars in SciELO
  • On index processSimilars in Google

Share


Chilean journal of agricultural research

On-line version ISSN 0718-5839

Abstract

TORRES, Géssica Xavier et al. Contribution of seed traits to the genetic diversity of a segregating population of Passiflora spp. Chil. j. agric. res. [online]. 2019, vol.79, n.2, pp.288-295. ISSN 0718-5839.  http://dx.doi.org/10.4067/S0718-58392019000200288.

Genetic diversity can be investigated early using seed traits, an important aspect of sexually propagated species. In this context, plant breeders aim at the production of new varieties using seeds with good germination and vigor. The present study was thus designed to examine the genetic diversity of a segregating population from a cross between Passiflora edulis Sims and P. setacea DC. based on seed morphological- and physiological-quality responses. Seventeen seed morphology variables were evaluated via digital image analysis, and a germination test and four vigor tests were applied for the evaluation of physiological quality. Data were interpreted by multivariate analysis for the evaluation of genetic diversity. The parents were allocated to distinct groups by the dendrogram structured using Euclidean distance, based on the morphological- and physiological-quality traits. The unweighted pair group method using arithmetic averages (UPGMA) clustering method formed three groups, the first one represented by backcrossing 32, the second by P. setacea and the third by a larger number of genotypes (P. edulis, hybrids and other backcrosses). The principal component analysis showed that the first two components explained 61.32% of the variation. The clustering methods were efficient in the evaluation of dissimilarity of genotypes from a segregating population of Passiflora

Keywords : Backcrossing; genetic variability; hybrids; Passiflora edulis; Passiflora setacea.

        · text in English     · English ( pdf )