A long-term systematic monitoring framework for on-farm conserved potato landrace diversity.

Haan, Stef de; Polreich, Severin; Rodríguez, Flor; Juárez, Henry; Plasencia, Franklin; Ccanto, Raul; Alvarez, C.; Atondo, A.; Sainz, Helios; Venegas, Claudio; Kalazich, Julio

doi:10.1079/9781780646138.0289

Cited by 6 publications

(6 citation statements)

References 17 publications

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“…Farmers in Huancavelica are indigenous Quechua speakers, while those in Pasco are mostly mestizo Spanish speakers. Both sites are recognized hotspots of potato intraspecific diversity [59,60]. A total of 176 and 147 households in the Huancavelica and Pasco landscapes, respectively, were randomly sampled and participated in the study.…”

Section: Study Area and Household Samplementioning

confidence: 99%

“…To determine the conservation status of cultivars for each landscape (Huancavelica, Pasco) we used two indices [59]: (i) Relative cultivar frequency (RCF), (ii) overall cultivar frequency (OCF). The RCF index is used to gauge the relative abundance or frequency (or rarity) of a unique cultivar in comparison to all other cultivars sampled in each landscape.…”

Section: Conservation Status Of Cultivarsmentioning

confidence: 99%

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The Spatial-Temporal Dynamics of Potato Agrobiodiversity in the Highlands of Central Peru: A Case Study of Smallholder Management across Farming Landscapes

Arce

Haan

Juárez

et al. 2019

Land

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In the high Andes, environmental and socio-economic drivers are transforming agriculture and presumably affecting the in situ conservation of potato (Solanum spp.). To monitor the use and conservation of intraspecific diversity, systematic and comparative studies across agricultural land-use systems are needed. We investigated the spatial-temporal dynamics of potato in two landscapes of Peru’s central Andes: A highland plateau (Huancavelica) compared to an eastern slope (Pasco). We examined household-level areal allocations, altitudinal distribution, sectoral fallowing practices, and the conservation status for three main cultivar groups: (i) Bred varieties, (ii) floury landraces, and (iii) bitter landraces. Mixed methods were used to survey 323 households and the 1101 potato fields they managed in 2012–2013. We compared the contemporary altitudinal distribution of landraces with 1975–1985 altimeter data from the International Potato Center. Intensification is occurring in each landscape while maintaining high intraspecific diversity. Access to land and production for sale compared to consumption significantly affected smallholder management and differentiated landscapes. Most landraces were scarce across households: 45.4% in Huancavelica and 61.7% in Pasco. Potato cultivation has moved upward by an average of 306 m since 1975. Landrace diversity is versatile but unevenly distributed across landscapes. This requires adaptive ways to incentivize in situ conservation.

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Section: Study Area and Household Samplementioning

confidence: 99%

Section: Conservation Status Of Cultivarsmentioning

confidence: 99%

The Spatial-Temporal Dynamics of Potato Agrobiodiversity in the Highlands of Central Peru: A Case Study of Smallholder Management across Farming Landscapes

Arce

Haan

Juárez

et al. 2019

Land

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Section: Introductionmentioning

confidence: 99%

“…Further in the same year, Padulosi and Dulloo (2012) proposed creating a Red List of cultivated plant species/varieties based on five steps: i) General assessment and inventory of LR; ii) Red List and vulnerable variety list establishment; iii) First validation of Red Lists; iv) Second validation of Red Lists; and v) Documentation and monitoring. More recently de Haan et al. (2016) ; de Haan et al.…”

Section: Introductionmentioning

confidence: 99%

“…However, there is still the requirement for an effective means of LR threat assessment to focus conservation targeting and proposals have been made for LR threat assessment techniques (e.g., Joshi et al, 2004;Porfiri et al, 2009;Padulosi and Dulloo, 2012;de Haan et al, 2016), although no standardised LR threat assessment methodology is currently widely accepted or easily applied. Joshi et al (2004) proposed categorising LR based on population, ecological, and social criteria (adapted from Brush, 2000), along with use and modernisation criteria, and there are obvious parallels to the IUCN categories.…”

Section: Introductionmentioning

confidence: 99%

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Towards a practical threat assessment methodology for crop landraces

Almeida,

Barata,

De Haan

et al. 2024

Front. Plant Sci.

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Crop landraces (LR), the traditional varieties of crops that have been maintained for millennia by repeated cycles of planting, harvesting, and selection, are genetically diverse compared to more modern varieties and provide one of the key components for crop improvement due to the ease of trait transfer within the crop species. However, LR diversity is increasingly threatened with genetic erosion and extinction by replacement with improved cultivars, lack of incentives for farmers to maintain traditional agricultural systems, and rising threats from climate change. Their active conservation is necessary to maintain this critical resource. However, as there are hundreds of thousands of LR and millions of LR populations for crops globally, active conservation is complex and resource-intensive. To assist in implementation, it is useful to be able to prioritise LR for conservation action and an obvious means of prioritisation is based on relative threat assessment. There have been several attempts to propose LR threat assessment methods, but none thus far has been widely accepted or applied. The aim of this paper is to present a novel, practical, standardised, and objective methodology for LR threat assessment derived from the widely applied IUCN Red Listing for wild species, involving the collation of time series information for LR population range, LR population trend, market, and farmer characteristics and LR context information. The collated information is compared to a set of threat criteria and an appropriate threat category is assigned to the LR when a threshold level is reached. The proposed methodology can be applied at national, regional, or global levels and any crop group.

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