Chakhao (delicious) rice landraces (Oryza sativa L.) of North-east India: collection, conservation and characterization of genetic diversity. Issue 3 (December 2014)

• Record Type: Journal Article
• Authors: Roy, Somnath; Banerjee, A.; Pattanayak, A.; Roy, S. S.; Rathi, R. S.; Misra, A. K.; Ngachan, S. V.; Bansal, K. C.
• Is Part Of: Plant genetic resources. Volume 12:Issue 3(2014)
• Page Start: 264
• Page End: 272
• Publication Date: 2014-12
• Subjects: Plant genetics -- Periodicals; Plant breeding -- Periodicals; 632.523
• DOI: 10.1017/S1479262113000580
• Languages: English
• ISSNs: 1479-2621

Abstract

<abstract abstract-type="normal"> <title> <x content-type="archive" xml:space="preserve">Abstract</x> </title> <p>Rice landraces have been developed through artificial selection imposed by farmers during the long-term domestication process. Although the global rice diversity is well characterized, few studies have conducted an in-depth analysis of genetic diversity on a local scale. In India, there are many locally adapted non-Basmati aromatic rice landraces in which the pace of improvement is slow, despite their high economic values. The aromatic and quality rice landraces of Manipur, locally called <italic>Chakhao</italic> (delicious), are important, considering their high economic and cultural values. To conserve and encourage improvement of these landraces, we collected <italic>Chakhao</italic> accessions from eight districts of Manipur. The aim of the current study was to investigate the level of genetic diversity and structure of 37 <italic>Chakhao</italic> landraces based on genotyping with 47 microsatellite markers. The genetic diversity analysis revealed high gene diversity (0.673) within the <italic>Chakhao</italic> population, with values ranging from 0.303 (<italic>Poireiton</italic>) to 0.471 (mixed <italic>Chakhao</italic>). The <italic>Chakhao</italic> rice accessions could be divided into six subgroups based on genetic structure analyses. The population structure derived from the STRUCTURE analysis largely correlated with the farmers' classification of <italic>Chakhao</italic> landraces. The results of genetic diversity analyses and the indigenous knowledge of the names and use of <italic>Chakhao</italic> landraces would facilitate the conservation and utilization of this unique genetic resource.</p> </abstract>