Morphological characterization, evaluation and selection of hibiscus (Hibiscus rosa-sinensis L.) hybrids

Date

6-2015

Degree

Bachelor of Science in Agriculture

Major Course

Major in Agronomy

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Pablito M. Magdalita

Abstract

Fifty-seven hibiscus hybrid progenies of different crosses growing at the Fruits and Ornamentals Section, Institute of Plant Breeding- Crop Science Cluster, College of Agriculture, University of the Philippines Los Baños were characterized and evaluated for different morphological traits to identify potential hybrids for further varietal development. Selection of progenies with unique flower color was done. A total of 13 progenies were selected including 22xDT-9, (LLxEFA)xGC-7, (LLxEFA)xGC-8, DSxGC-7, 20xGC-5, (GCxBGB)xHP-4, GCxDS-4, ABAxMDM-1, ABAxMDM-3, 23xGC-2, CVxNB-1, CVxNB-2 and CVxMP-4. The data gathered were analyzed for principal component analysis (PCA) and agglomerative cluster analysis. Correlation based on PCA revealed significant positive association between flower size and leaf size. Petiole length revealed significant positive correlation with leaf size but had significantly negative association with style length. Receptacle length revealed negative correlation with pedicel length. Principal component analysis depicted three major PCs with with Eigenvalue >1 contributing 77.97% of total cumulative variability among different hybrids. The PC-I showed positive factor loadings for all the traits. The contribution of flower size, leaf size and style length was highest in PC-I. Cluster analysis based on PCA using the three major components grouped the hybrids into 5 different clusters. Cluster-I had the highest number of members, consists of yellow to orange red and red purple colored hybrids and the flowers are large with a mean value of 131.09 mm. Cluster-II had 15 members, possessed purple, yellow and white colored hybrids and the flowers are large with a mean of 140.54 mm. Cluster-III comprised of 5 members with yellow orange, orange red and red purple colors. The flowers are large, with a mean of 131.12 mm. Cluster-IV had 13 members, comprised of yellow to red and white colored hybrids. The flowers are small, with a mean of 115.20 mm. Cluster-V comprised of 8 hybrids with yellow to red and red purple colors. The flowers are large, with a mean of 130.21 mm. PCA results were in agreement with dendrogram results. Results of the study revealed that PCA and cluster analysis can be a basis for selection of desired traits in succeeding generations for Hibiscus breeding program.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 2015 A3 /C33

Document Type

Thesis

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