globalchange  > 过去全球变化的重建
DOI: 10.1371/journal.pone.0081510
论文题名:
Managing Potato Biodiversity to Cope with Frost Risk in the High Andes: A Modeling Perspective
作者: Bruno Condori; Robert J. Hijmans; Jean Francois Ledent; Roberto Quiroz
刊名: PLOS ONE
ISSN: 1932-6203
出版年: 2014
发表日期: 2014-1-30
卷: 9, 期:1
语种: 英语
英文关键词: Potato ; Tubers ; Crop genetics ; Vegetable crops ; Vegetables ; Solanum ; Climate change ; Plant breeding
英文摘要: Austral summer frosts in the Andean highlands are ubiquitous throughout the crop cycle, causing yield losses. In spite of the existing warming trend, climate change models forecast high variability, including freezing temperatures. As the potato center of origin, the region has a rich biodiversity which includes a set of frost resistant genotypes. Four contrasting potato genotypes –representing genetic variability- were considered in the present study: two species of frost resistant native potatoes (the bitter Solanum juzepczukii, var. Luki, and the non-bitter Solanum ajanhuiri, var. Ajanhuiri) and two commercial frost susceptible genotypes (Solanum tuberosum ssp. tuberosum var. Alpha and Solanum tuberosum ssp. andigenum var. Gendarme). The objective of the study was to conduct a comparative growth analysis of four genotypes and modeling their agronomic response under frost events. It included assessing their performance under Andean contrasting agroecological conditions. Independent subsets of data from four field experiments were used to parameterize, calibrate and validate a potato growth model. The validated model was used to ascertain the importance of biodiversity, represented by the four genotypes tested, as constituents of germplasm mixtures in single plots used by local farmers, a coping strategy in the face of climate variability. Also scenarios with a frost routine incorporated in the model were constructed. Luki and Ajanhuiri were the most frost resistant varieties whereas Alpha was the most susceptible. Luki and Ajanhuiri, as monoculture, outperformed the yield obtained with the mixtures under severe frosts. These results highlight the role played by local frost tolerant varieties, and featured the management importance –e.g. clean seed, strategic watering- to attain the yields reported in our experiments. The mixtures of local and introduced potatoes can thus not only provide the products demanded by the markets but also reduce the impact of frosts and thus the vulnerability of the system to abiotic stressors.
URL: http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0081510&type=printable
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/18939
Appears in Collections:过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响

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作者单位: Liaison Office in Bolivia, International Potato Center, La Paz, La Paz, Bolivia;Department of Environmental Science and Policy, University of California, Davis, Davis, California, United States of America;Unité d’Ecophysiologie et d’Amélioration Végétale, Université Catholique de Louvain, Louvain-la-Neuve, Brabant, Belgium;Integrated Crops and Systems Research Program, International Potato Center, La Molina, Lima, Peru

Recommended Citation:
Bruno Condori,Robert J. Hijmans,Jean Francois Ledent,et al. Managing Potato Biodiversity to Cope with Frost Risk in the High Andes: A Modeling Perspective[J]. PLOS ONE,2014-01-01,9(1)
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