Phenotypic characterization and genetic diversity of Passiflora spp. using qualitative multicategoric descriptors
Abstract
This study aimed to perform phenotypic characterization and to analyze the genetic diversity of Passiflora spp. accessions using qualitative multicategoric descriptors from leaves and flowers. The study was conducted in the Active Germplasm Bank 'Flor da Paixão' at Embrapa Cerrados. One hundred and twenty five Passiflora spp accessions were characterized using 48 qualitative multicategoric descriptors (23 from sheet and 25 from flower). Frequency distribution of accesses on different phenotypic classes of each descriptor was used to estimate the entropy coefficient for each descriptor. Genetic distances between accessions were estimated using a simple coincidence index. From the genetic distance matrix, grouping analysis via dendrogram were performed using as criterion the Unweighted Pair-Group Method using Arithmetic method Avarages. Phenotypic characterization based on qualitative multicategoric descriptors contributed to the 125 Passiflora spp. accessions differentiation. These characterization serving as an important tool to quantify the existing diversity and accessions differentiation. It is important for more comprehensive studies of genetic diversity and characterization of Passiflora genetic resources.
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References
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