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Diversity among different populations of a locally common rice (Oryza sativa L.) landrace from north-western Indian Himalayas

Published online by Cambridge University Press:  19 April 2010

S. Kumar ,
A. Pandey ,
I. S. Bisht ,
K. V. Bhat  and
P. S. Mehta
S. Kumar
Affiliation:
National Bureau of Plant Genetic Resources, Pusa Campus, New Delhi110 012, India
A. Pandey
Affiliation:
National Bureau of Plant Genetic Resources, Pusa Campus, New Delhi110 012, India
I. S. Bisht*
Affiliation:
National Bureau of Plant Genetic Resources, Pusa Campus, New Delhi110 012, India
K. V. Bhat
Affiliation:
National Bureau of Plant Genetic Resources, Pusa Campus, New Delhi110 012, India
P. S. Mehta
Affiliation:
National Bureau of Plant Genetic Resources, Regional Station, Bhowali263132, Uttarakhand, India
*
*Corresponding author. E-mail: [email protected]; [email protected]
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Abstract

Genetic structure of five populations of a locally common rice (Oryza sativa L.) landrace Jaulia from parts of Uttarakhand state of India was studied using sequence tagged microsatellite site (STMS) markers. Of these, four populations were on-farm managed, assembled from different niche environments, and one population was conserved ex situ and represented static conservation. The 16 STMS primer pairs fully differentiated the inter- and intrapopulation diversity. A total of 72 alleles were recorded with a mean of 4.5 alleles per locus. Population wise, the total number of alleles ranged from 21 to 41, with maximum number of alleles for population IC 548358 and minimum number of alleles for population IC 100051 representing static conservation. A greater number of alleles specific to populations under farmer management could be recorded. Changes in yield parameters also seemed to be affected under farmer management besides other environmental adaptations for qualitative morphological characters. The marker diversity using STMS primer pairs indicates the genetic differentiation among populations resulting from joint effects of several evolutionary forces operating within the historical and biological context of the crop landrace. The variations in adaptations, on the other hand, indicate the degree to which populations are adapted to their environments and their potential for continued performance or as donors of characters in plant breeding. Both biotic and abiotic aspects of the environment are involved.

Keywords

in situ conservation on farmlandrace population structureOryza sativa Lricestatic conservation
Type
Research Article
Information
Plant Genetic Resources , Volume 8 , Issue 2 , August 2010 , pp. 151 - 158
Copyright
Copyright © NIAB 2010

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