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Development of core subset for the collection of Chinese cultivated eggplants using morphological-based passport data

Published online by Cambridge University Press:  01 April 2008

Mao Weihai*
Affiliation:
Institute of Vegetable Crops, Zhejiang Academy of Agricultural Sciences, Hangzhou310021, China
Yi Jinxin
Affiliation:
Institute of Vegetable Crops, Jiangsu Academy of Agricultural Sciences, Nanjing210014, China
Darasinh Sihachakr
Affiliation:
Université Paris Sud, Ecologie, Systématique, Evolution, UMR8079, CNRS, AgroParisTech, bât. 360, Orsay, F-91405, France
*
*Corresponding author. E-mail: [email protected]

Abstract

A total of 1968 accessions of cultivated eggplants, belonging to Solanum melongena and Solanum aethiopicum and procured from the IVC/JAAS (Nanjing) and IVC/ZAAS (Hangzhou), China, were examined for 23 morphological traits, such as characteristics of plant, stems, leaves, flowers, fruits and original geographic information. A comprehensive numerical classification methodology, including two types of genetic distance, viz. Mahalanobis (Ma) distance and Euclidean (Eu) distance; four clustering methods, viz. unweighted pair group average (UPGA), Ward's (W), complete linkage (CL) and single linkage (SL) methods; three sampling strategies, viz. random (R), preferred (P) and deviation (D); and four sampling sizes (10, 15, 20 and 30% of initial collection), was used to divide all accessions into main groups and subgroups for the establishment of candidate collections. The evaluation of these candidate collections showed that a combination of Eu distance, UPGA clustering method, and R or P sampling strategy with sampling size at 15–20% was suitable for establishing the core collection, providing an adequate and representative genetic diversity of the initial collection of the cultivated eggplants.

Type
Research Article
Copyright
Copyright © NIAB 2008

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