Morphological diversity in the eggplant (Solanum spp.) collection at the Asian Vegetable Research and Development Center (AVRDC) the world vegetable center genebank

Date

3-2010

Degree

Bachelor of Science in Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Joel C. Mendoza

Request Access

To request access of this material, please email the administrator at uscs-mainlib.uplb@up.edu.ph

Abstract

Morphological diversity analysis of 132 accessions of Solanum spp. from the genebank of the AVRDC-The World Vegetable Center was performed. Qualitative and quantitative trait analyses were done initially on the 67 taxonomically identified accessions in the sample. Thirty-one qualitative and 21 quantitative descriptors from the AVRDC-GRSU descriptor list were used. The qualitative data was subjected to simple matching (SM) coefficient analysis (Simqual) followed by SAHN-UPGMA cluster analysis using five sets of descriptors—all qualitative, inflorescence, fruit, leaf, and plant descriptors. Interspecific variation was observed using the set of all qualitative descriptors at an SM coefficient of 0.492. The putative identity of most unidentified accessions in the sample was S. melongena based on the cluster analysis using all qualitative descriptors for the entire sample. Intraspecific variation was mostly observed using the set of fruit descriptors. Applying Ward’s method of cluster analysis using Manhattan distances via the open source statistical analysis software Orange on the quantitative data from the subset of identified accessions revealed interspecific variation in S. melongena and S. scabrum accessions. Five out of the 21 quantitative descriptors were then selected after principal component analysis (PCA) using the Keiser criterion. Cluster analysis using these five descriptors showed low intraspecific diversity in all species while retaining the interspecific variability observed prior to PCA. Thus, the quantitative traits used were ineffective in assessing the intraspecific morphological diversity of the collection. S. melongena accessions displayed considerable intra- and interspecific variability using qualitative descriptors, while S. aethiopicum and S. scabrum on the other hand, showed only interspecific morphological diversity. Variability of the remaining accessions was not assessed due to lack of taxonomic identification.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

UPLBUT-10533

Document Type

Thesis

This document is currently not available here.

Share

COinS