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Genetic and geographical divergence in horse gram germplasm from Andhra Pradesh, India

Published online by Cambridge University Press:  01 April 2009

N. Sunil ,
N. Sivaraj ,
S. R. Pandravada ,
V. Kamala ,
P. Raghuram Reddy  and
K. S. Varaprasad
N. Sunil*
Affiliation:
National Bureau of Plant Genetic Resources, Regional Station, Rajendranagar, Hyderabad 500030, India
N. Sivaraj
Affiliation:
National Bureau of Plant Genetic Resources, Regional Station, Rajendranagar, Hyderabad 500030, India
S. R. Pandravada
Affiliation:
National Bureau of Plant Genetic Resources, Regional Station, Rajendranagar, Hyderabad 500030, India
V. Kamala
Affiliation:
National Bureau of Plant Genetic Resources, Regional Station, Rajendranagar, Hyderabad 500030, India
P. Raghuram Reddy
Affiliation:
Central Research Institute for Dryland Agriculture, Santhoshnagar, Hyderabad 500059, India
K. S. Varaprasad
Affiliation:
National Bureau of Plant Genetic Resources, Regional Station, Rajendranagar, Hyderabad 500030, India
*
*Corresponding author. E-mail: [email protected]
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Abstract

Nine characters contributing to seed yield were measured on 20 accessions of horse gram (Macrotyloma uniflorum (Lam.) Verd), and subjected to genetic divergence analysis using Mahalanobis statistic and mapping using DIVA-GIS. The accessions were collected from two eco-geographical regions of Andhra Pradesh (India) – North Coastal and Rayalaseema. Based on D2 values the genotypes were grouped into five clusters. Genetic diversity was not related to eco-geographical distribution. The greatest inter-cluster distance separated clusters II and V, followed by clusters IV, and V, III and IV. Entries in clusters V and II appear suitable as parents for horse gram improvement. The Rayalaseema region is the source of useful variation for days to flowering, maturity and yield.

Keywords

cluster analysisgenetic diversityGeographic Information Systemhorse gram
Type
Short Communication
Information
Plant Genetic Resources , Volume 7 , Issue 1 , April 2009 , pp. 84 - 87
Copyright
Copyright © NIAB 2008

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