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- 저자 : Bhuwon Sthapit (검색결과 2 건)
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Hue, Nguyen Thi Ngoc,Derva Jarvis,Bhuwon Sthapit 한국생태학회 2004 Journal of Ecology and Environment Vol.27 No.1
Understanding farmer household and community management of crop diversity is necessary in order to effectively strengthen the local plant genetic resources management system in Vietnam. Assessment and management for distribution of farmer s cultivars of rice, taro and tropical tree species were conducted in four different agro-ecological zones in Vietnam using participatory approaches, focus surveys, diversity fairs, agro-morphological field trials, isozyme analysis to understand why Vietnamese farmers grow diverse types of these crop cultivars, when and where these crops cultivars are grown and how farmers maintain and use them. Results showed significant differences in the extent, distribution and use pattern crop cultivars diversity in contrasting environments and between community farmer households. Seed system is an important role in the access and use of diversity in eco-geographical regions.
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Ritesh Kumar Yadav,Rita Gurung,Rajeev Dhakal,Achyut Raj Adhikari,Subash Gautam,크리슈나 하리 기미르,Bhuwon Ratna Sthapit 한국작물학회 2019 Journal of crop science and biotechnology Vol.22 No.5
Drawing upon consequentially growing food insecurity in mid-hills attributed to poor adoption levels inter alia inflicted by narrow range of locally adaptive farmer’s preferred cold tolerant rice varietal options in national agricultural system, the present study was undertaken. We conducted on farm diversity assessment of 60 high altitude rice genotypes from ex-situ and on farm employing un-replicated diversity block in 2015. Subsequently, we identified eight promising locally adaptive genotypes as candidate genotypes based on the inferences of diversity block trial and evaluated them through participatory variety selection (PVS) using randomized block design in 2016 under on-farm conditions. Our studies revealed marked diversity among the Nepalese cold-tolerant rice genotypes. The UPGMA cluster analysis categorized the 60 genotypes into six distinct clusters. Strong positive correlation between grain yield and plant height; panicle length; straw yield and strong negative correlation between grain yield and 1000-grain weight was detected. PCA suggested traits viz., plant height, panicle length, days to 50% heading, and grain yield to be principal discriminatory characteristics of the cold-tolerant rice. Seto Kattike, Naulo Dhan, and Borang were most promising and adaptive genotypes whose eminence were justifiably corroborated and validated by farmer’s overall evaluation. The most valued farmer’s selection criteria were grain and straw yield, earliness, disease resistance, and stem borer tolerance. The findings bolster employment of novel and proven participatory plant breeding approach using diversity kits and IRD kits to expand and promote varietal choice options for immediate benefits to the farmers and facilitate rapid varietal release and registration.
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