Traditional seed management and genetic diversity in barley varieties in high-hill agro-ecosystems of Nepal

Traditional seed management and genetic diversity in barley varieties in high-hill agro-ecosystems of Nepal

Chawali and Lekali are two common farmer’s barley varieties or landraces in Jumla, Nepal (2,240–3,000 m) with small to bold grains and wide adaptation from irrigated low lands to high hills. This study was undertaken to test whether features of the traditional seed system can significantly influence...

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Bibliographic Details
Published in:Genetic resources and crop evolution Vol. 59; no. 3; pp. 389 - 398
Main Authors: Bajracharya, Jwala, Brown, Anthony H. D, Joshi, Bal K, Panday, Dipak, Baniya, Bimal K, Sthapit, Bhuwon R, Jarvis, Devra I
Format: Journal Article
Language:English
Published: Dordrecht Springer-Verlag 01-03-2012
Springer Netherlands
Springer Nature B.V
Subjects:
Agricultural ecosystems
Agriculture
agroecosystems
Barley
Biomedical and Life Sciences
cultivars
Divergence
Farmers
Farms
Gene flow
Genetic diversity
genetic polymorphism
genetic variation
hills
Households
landraces
Life Sciences
microsatellite repeats
Plant Genetics and Genomics
Plant Physiology
Plant Sciences
Plant Systematics/Taxonomy/Biogeography
Populations
Research Article
Strategic management
villages
Nepal
Genetic diversity
Informal seed system
Polymorphic loci
Simple sequence repeat
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Summary:Chawali and Lekali are two common farmer’s barley varieties or landraces in Jumla, Nepal (2,240–3,000 m) with small to bold grains and wide adaptation from irrigated low lands to high hills. This study was undertaken to test whether features of the traditional seed system can significantly influence the diversity of a crop and its conservation on-farm. In Jumla (high-hill), the barley seed system is completely informal and is mainly from farmer to farmer. In the present study, the seed flows and the pattern of genetic diversity in barley were investigated to detect differences between the two varieties and test the divergence among populations of each variety These data suggested that Chawali, the more common variety, was less subject to homogenising gene flow between farms than was Lekali. A total of 128 farming households were surveyed for seed supply information and 128 populations for each landrace from two villages: Kartikswami and Talium were collected for SSR diversity analysis. Some 92 SSRs were screened in an initial sample of 20 barley populations of both landraces and 2 improved varieties (LG-51 and Soluwa). Of the 81 SSRs that consistently amplified, only 15 SSRs (19%) were polymorphic with gene diversity values ranging from 0.09 to 0.71. A medium to low diversity was detected among the landrace populations of barley varieties. Chawali populations were less polymorphic within ecological groups, and more divergent between than were Lekail populations. This result accords with Chawali having a more conservative local seed system.
Bibliography:http://dx.doi.org/10.1007/s10722-011-9689-2
ISSN:0925-9864
1573-5109
DOI:10.1007/s10722-011-9689-2