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STUDIES ON FARMER MANAGEMENT OF RICE LANDRACE DIVERSITY IN TRADITIONAL PRODUCTION SYSTEMS FROM HIGH ALTITUDE AREAS OF INDIAN HIMALAYAS

KrishiKosh

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Title STUDIES ON FARMER MANAGEMENT OF RICE LANDRACE DIVERSITY IN TRADITIONAL PRODUCTION SYSTEMS FROM HIGH ALTITUDE AREAS OF INDIAN HIMALAYAS
Ph D
 
Creator AVINASH PANDEY
 
Contributor I. S. Bisht
 
Subject Unable to Generate Tags avinash pandey- 9452- phd thesis.pdf
 
Description T-8216
The present study demonstrated farmer management of rice landrace population
structure in traditional production systems of high altitude regions of Indian
Himalayas. The 11 STMS primer pairs indicated enough polymorphism to fully
differentiate the inter- and intra-population diversity of 20 rice landrace populations,
10 each from parts of north-western and north-eastern Himalayas, respectively. A
total number of 71 alleles were recorded of which 58 were common and 13 were
rare. The mean number of alleles per locus was 6.45, and for landrace populations
from North-western and North-eastern region were 5.0 and 5.64, respectively. Of the
71 alleles, 46 were common to both north-western and north-eastern regions whereas
9 were unique to the former and 16 were unique to the later, respectively. Landrace
populations from north-western region were relatively more diverse than northeastern
region. Population differentiation, as revealed by high FST value (0.61), was
also greater for north-eastern populations. The UPGMA dendrogram classified the
populations into three major clusters, cluster I comprised seven populations from
north-western region, cluster II comprised seven populations from north-eastern
region and cluster III comprised populations from both regions. A model-based
method (structure analysis) was also used for cluster analysis. Similar results
showing minor deviation between UPGMA and structure analysis were found.
Investigating the population genetic structure can therefore help monitor change in
diversity over time and space, and also for devising a rational plan for management
of farmer landraces on-farm. Variation in rice landrace populations due to
environmental adaptations was also studied and importance of such adaptations in
crop improvement was highlighted.
 
Date 2016-09-27T17:57:46Z
2016-09-27T17:57:46Z
2010
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/79209
 
Format application/pdf
 
Publisher IARI, NATIONAL BUREAU OF PLANT GENETIC RESOURCES