Conserving Traditional Rice Varieties through Management for Crop Diversity

Zhu, Youyong; Wang, Yunyue; Chen, Hairu; Lu, Bing-Rui

doi:10.1641/0006-3568(2003)053[0158:ctrvtm]2.0.co;2

Cited by 46 publications

(25 citation statements)

References 11 publications

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“…Importantly, this diversity management model shows its great potential as a possible solution for the sustainable in situ on-farm conservation of traditional rice varieties (Zhu et al ., 2003). Because of the popularity among farmers, this cultivation method has spread extensively in the Yunnan Province and to its neighboring regions such as Sichuan and Guizhou Provinces, extending to an area of more than a half million hectares, as estimated by the Yunnan government in 2003 (unpubl.…”

Section: Discussionmentioning

confidence: 99%

“…Thus, the reason for degeneration of traditional rice varieties in such mixed-planting model requires further investigation. In other words, gene flow frequency from hybrid to traditional rice varieties is extremely low in diversity management practice, which should be continued to serve as an effective method for rice disease control (Zhu et al ., 2000), as well as for on-farm conservation of traditional rice varieties (Zhu et al ., 2003). Nevertheless, since there exists a low frequency of gene flow to the traditional rice variety, an appropriate measure of rejuvenation of traditional varieties cultivated in intercropping should be conducted after some generations if the varieties are used as seeds.…”

Section: Discussionmentioning

confidence: 99%

“…This intercropping system uses genetic diversity to reduce rice blast, providing an effective method for in situ conservation of traditional rice varieties in addition to the advantages of an ecologically friendly method of disease control, yield increase and fertilizer reduction in rice ecosystems (Zhu et al ., 2003). However, some farmers observed undesirable traits, such as poor seed quality and less favorable taste of their traditional rice varieties that are mix-planted with hybrid rice varieties.…”

Section: Introductionmentioning

confidence: 99%

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Asymmetric gene flow between traditional and hybrid rice varieties (Oryza sativa) indicated by nuclear simple sequence repeats and implications for germplasm conservation

et al. 2004

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Summary• Mixed-planting of traditional and hybrid rice ( Oryza sativa ) varieties is an ecological approach for rice disease control and yield increase, in addition to its effective role in in situ conservation of traditional rice varieties. To estimate gene flow between traditional and hybrid rice varieties, an experiment involving Huangkenuo and Shanyou-63 was conducted to allow free gene flow by mixed-planting of the two varieties in different cultivation patterns.• A simple sequence repeat (SSR) marker RM167 was used to detect natural hybrids between the two varieties by examining seeds collected randomly from both varieties in the experiment.• The result showed an extremely low number of hybrids between the two varieties with an average frequency of 0.04% in Huangkenuo and 0.18% in Shanyou-63.• It is concluded that no significant gene flow occurs naturally between Huangkenuo and Shanyou-63, and that crop diversity management is a proper means for in situ conservation of traditional rice varieties. It is also implied that the potential transgene flow from transgenic hybrid rice to traditional rice variety would be extremely low.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Asymmetric gene flow between traditional and hybrid rice varieties (Oryza sativa) indicated by nuclear simple sequence repeats and implications for germplasm conservation

et al. 2004

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“…The experiment was so successful that fungicidal sprays were no longer applied by the end of the two-year programme. The practice expanded to more than 40,000 hectares in 2000, and now includes some varieties that were formerly locally extinct (Zhu et al, 2003). This is especially remarkable as the yield gains were on top of already high average yields in the region, at nearly 10 tonnes per hectare; among the highest in the world (Zhu et al 2000).…”

confidence: 99%

- Addressing Soil Impacts on Public Health: Issues and Recommendations

2012

Soils and Human Health

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“…The Hani terraces have formed spectacular "forest-village-terrace-river" ecological landscapes, which spread for more than 70,000 ha over 1300 years. The Hani people, their indigenous agricultural technologies and practices, their selection of settlement sites and traditional customs for environmental protection and conservation all show an adaptive relationship with nature [2][3][4][5][6][7]. These practices have been developed over time, and invariably involve the management of water.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Tourism Water Capacity in Agricultural Heritage Sites

et al. 2015

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Agricultural heritage sites have been gaining popularity as tourism destinations. The arrival of large numbers of tourists, however, has created serious challenges to these vulnerable ecosystems. In particular, water resources are facing tremendous pressure. Thus, an assessment of tourism water footprint is suggested before promoting sustainable tourism. This paper uses the bottom-up approach to construct a framework on the tourism water footprint of agricultural heritage sites. The tourism water footprint consists of four components, namely accommodation water footprint, diet water footprint, transportation water footprint and sewage dilution water footprint. Yuanyang County, a representative of the Honghe Hani rice terraces, was selected as the study area. Field surveys including questionnaires, interviews and participant observation approaches were undertaken to study the tourism water footprint and water capacity of the heritage site. Based on the results, OPEN ACCESSSustainability 2015, 7 15549 measures to improve the tourism water capacity have been put forward, which should provide references for making policies that aim to maintain a sustainable water system and promote tourism development without hampering the sustainability of the heritage system. The sewage dilution water footprint and the diet water footprint were top contributors to the tourism water footprint of the subject area, taking up 38.33% and 36.15% of the tourism water footprint, respectively, followed by the transportation water footprint (21.47%). The accommodation water footprint had the smallest proportion (4.05%). The tourism water capacity of the heritage site was 14,500 tourists per day. The water pressure index was 97%, indicating that the water footprint was still within the water capacity, but there is a danger that the water footprint may soon exceed the water capacity. As a consequence, we suggest that macro and micro approaches, including appropriate technologies, awareness enhancement and diversified tourism product development throughout the whole year that can alleviate the water pressure at critical times, could be taken to optimize the water management of the heritage sites.

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Conserving Traditional Rice Varieties through Management for Crop Diversity

Cited by 46 publications

References 11 publications

Asymmetric gene flow between traditional and hybrid rice varieties (Oryza sativa) indicated by nuclear simple sequence repeats and implications for germplasm conservation

Asymmetric gene flow between traditional and hybrid rice varieties (Oryza sativa) indicated by nuclear simple sequence repeats and implications for germplasm conservation

- Addressing Soil Impacts on Public Health: Issues and Recommendations

Evaluation of Tourism Water Capacity in Agricultural Heritage Sites

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