The Role of Organic Acids in the Domestication of Oxalis tuberosa: A New Model for Studying Domestication Resulting in Opposing Crop Phenotypes1

  title={The Role of Organic Acids in the Domestication of Oxalis tuberosa: A New Model for Studying Domestication Resulting in Opposing Crop Phenotypes1},
  author={E. Jane Bradbury and Eve Emshwiller},
  journal={Economic Botany},
The Role of Organic Acids in the Domestication ofOxalis tuberosa: A New Model for Studying Domestication Resulting in Opposing Crop Phenotypes. Though few crops display directly opposing domesticated phenotypes, these crops may be the key to understanding domestication processes that address conflicting selective pressures in the agricultural ecosystem. Two relatively well-known examples are cassava (Manihot esculenta Crantz), which has high-cyanide and low-cyanide varieties, and potato… 

Genetic basis for folk classification of oca (Oxalis tuberosa Molina; Oxalidaceae): implications for research and conservation of clonally propagated crops

It is argued that efforts to understand and conserve clonal crop diversity will be most effective when both folk classification and its genetic basis are considered together.

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Diversity of Oxalis tuberosa Molina: a comparison between AFLP and microsatellite markers

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The sociocultural backgrounds of the respondents (elders, former miners, or descendants of miners) and the historical importance of wild food plants to local diets increased the predictive power of the perceived nutritional importance and ease of acquisition of these plants.

Farmers’ unconscious incorporation of sexually-produced genotypes into the germplasm of a vegetatively-propagated crop (Oxalis tuberosa Mol.)

The interviews indicated that six out of the nine interviewed farmers were likely, albeit unconsciously, incorporating clonal lineages issuing from sexual reproduction into their varieties, suggesting a strong effect of such incorporations on the genetic diversity of the plant varieties.

Self-reported Willingness to Pay for Texas Persimmon Fruit as a Food Source

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Oxalis tuberosa (Oca)

This datasheet on Oxalis tuberosa covers Identity, Overview, Associated Diseases, Pests or Pathogens, Distribution, Biology & Ecology, Environmental Requirements, Uses, Management, Genetics and



Andean root and tuber crops: Underground rainbows

The Andean region is recognized today as one of the most important centers of crop origin and diversity in the world (National Research Council, 1989). Many of our most important food crops

Origins of domestication and polyploidy in oca (Oxalis tuberosa; Oxalidaceae). 3. AFLP data of oca and four wild, tuber-bearing taxa.

AFLP data for oca was compared with four wild, tuber-bearing Oxalis taxa found in different regions of the central Andes, confirming the divergence of two use-categories of cultivated oca that indigenous farmers use for different purposes and suggesting the possibility that they might have had separate origins of domestication.

The effect of cooking on the location and concentration of oxalate in three cultivars of New Zealand-grown oca (Oxalis tuberosa Mol)

Oca (Oxalis tuberosa Mol) originates from South America but is now also grown commercially in New Zealand. It contains moderate amounts of oxalate, which is only present in its soluble form. The skin

Origins of domestication and polyploidy in oca (Oxalis Tuberosa: Oxalidaceae). 2. Chloroplast-expressed glutamine synthetase data.

Data from phylogenetic analysis of DNA sequences of the chloroplast-active (nuclear encoded) isozyme of glutamine synthetase from cultivated oca, its allies in the "Oxalis tuberosa alliance," and other Andean Oxalis identify these two taxa as the best candidates as progenitors of cultivated Oca.


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Oxalates in oca (New Zealand yam) (Oxalis tuberosa Mol.).

TheOxalate concentrations obtained in this study for oca suggest that previously reported values are too low and that oca is a moderately high oxalate-containing food.

Biochemical and folk assessment of variability of andean cultivated potatoes

The amount of variability observed in the sample of the Andean potato population was superior to that present in North American and European varieties and supports the impression that a substantial amount of yet unexploited variability remains in Andean Potato populations.

Oxalate Content of Raw and Cooked Oca (Oxalis tuberosa)

Oca (Oxalis tuberosa Mol.) or New Zealand yam, in common with other members of this genus, contains oxalate, an antinutritive factor. Twelve South American and two New Zealand cultivars of oca were

Unmanaged sexual reproduction and the dynamics of genetic diversity of a vegetatively propagated crop plant, cassava (Manihot esculenta Crantz), in a traditional farming system

It is argued that recombination and gene flow play a major role in the dynamics of genetic diversity of cassava in traditional farming systems.

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The domestication of the potato serves as the focus of Timothy Johns's interdisciplinary study, which forges a bold synthesis of ethnobotany and chemical ecology.