Abstract
Abstract Morphological diversity in 92 eggplant genotypes based on twenty one characters was estimated using Mahalanobis’s D 2 statistics. The highest intra-cluster distance was observed in cluster VIII (2.13), containing seven genotypes and the lowest intra-cluster distance (1.18) was observed in cluster IV having four genotypes. Ninety two eggplant genotypes were grouped into ten different clusters by non-hierarchical clustering. The cluster X had the maximum number (17) of genotypes and cluster II and III had minimum number (3) of genotypes. The highest inter-cluster distance was observed between cluster II and VIII (30.86) indicated the genotypes in these clusters were more diverged than those of other clusters. The lowest inter-cluster distance was observed between the clusters V and X (3.72) suggesting a close relationship among the genotypes included within these clusters. Cluster II constitute three genotypes and produced the highest mean value for number of flowers per inflorescence (4.67) and yield per plant (812.33) and the lowest mean value days to 1st flowering (108.22). Cluster IV constitute three genotypes namely EP-080, EP-081, EP-089 and produced fruits for longer duration (82.33). Cluster VIII constitute seven genotypes and showed the lowest mean value for number of infected shoots per plant (1.57). Cluster X established with 17 genotypes produced the lowest mean value for number of infected fruit per plant (8.26). Therefore, more emphasis should be given on cluster II, IV and VIII for selecting genotypes as parents for crossing which may produce new recombinants with desired traits.
Highlights
Brinjal or eggplant or aubergine (Solanum melongena L.) is indigenous to a vast area stretching from northeast India and Burma, to Northern Thailand, Laos, Vietnam and Southwest China and wild plants can still be found in these locations (Daunay and Janick, 2007)
The aim of the present study was to characterize eggplant genotypes collected from different regions of Bangladesh and exotic sources to assess the genetic diversity within the germplasm
Materials and Methods Ninety two genotypes of indigenous and exotic eggplants collected from the Plant Genetic Resources Centre (PGRC) and Horticulture Research Centre (HRC) of Bangladesh Agricultural Research Institute (BARI) were studied to measure the diversity among the genotypes at the Field Laboratory, Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur
Summary
Brinjal or eggplant or aubergine (Solanum melongena L.) is indigenous to a vast area stretching from northeast India and Burma, to Northern Thailand, Laos, Vietnam and Southwest China and wild plants can still be found in these locations (Daunay and Janick, 2007). Eggplant was domesticated from wild forms in the Indo-Burma region with indications that it was cultivated in antiquity. Several Sanskrit documents, dated from as early as 300 BCE, mention this plant with various descriptive words, which suggest its wide popularity as food and medicine (Nadkarni, 1927). In the Ayurvedic, a Hindi system of medicine, white types were recommended for diabetic patients, and Received 25 January 2011; Revised 18 October 2011; Accepted 26 October 2011; Published Online 24 November 2012. M. Aminul Islam Department of Genetics and Plant Breeding Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur 1706, Bangladesh
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