AGRICULTURAL SCIENCES. For the article “A global perspective of the richness and evenness of traditional crop-variety diversity maintained by farming communities,” by Devra I. Jarvis, Anthony H. D. Brown, Pham Hung Cuong, Luis Collado-Panduro, Luis Latournerie-Moreno, Sanjaya Gyawali, Tesema Tanto, Mahamadou Sawadogo, Istvan Mar, Mohammed Sadiki, Nguyen Thi-Ngoc Hue, Luis Arias-Reyes, Didier Balma, Jwala Bajracharya, Fernando Castillo, Deepak Rijal, Loubna Belqadi, Ram Rana, Seddik Saidi, Jeremy Ouedraogo, Roger Zangre, Keltoum Rhrib, Jose Luis Chavez, Daniel Schoen, Bhuwon Sthapit, Paola De Santis, Carlo Fadda, and Toby Hodgkin, which appeared in issue 14, April 8, 2008, of Proc Natl Acad Sci USA (105:5326–5331; first published March 24, 2008; 10.1073/pnas.0800607105), the authors note that Table 1 was incorrect in part. In row 8, column 1, the genus name Cucurbita appeared in error. Also in row 8, column 2, the footnote symbol on “Peru” should have appeared as §. In addition, the wording of some of the footnotes was clarified, and the reference citation for Sadiki et al. was corrected to read “(16)”. The corrected table appears below.
Table 1.
Rationale and procedure for defining units of diversity in 27 crops species in eight countries
| Crop | Country | Variety name– units-of-diversity relationship* | Breeding system† | Major starch source |
|---|---|---|---|---|
| Barley (Hordeum vulgare) | Nepal | A | In | Yes |
| Rice (Oryza sativa) | Nepal, Vietnam | A | In | Yes |
| Finger millet (Eleusine coracana) | Nepal | A | In | |
| Bean (Phaseolus vulgaris, P. lunatis, Vigna unguiculata)‡ | Burkina Faso, Mexico, Peru | A | In | |
| Peanut (Arachis hypogaea) | Burkina Faso, Peru | A | In | |
| Okra (Abelmoschus esculentus) | Burkina Faso | A | Oc | |
| Squash (Cucurbita maxima, C. mixta, C. moschata, C. pepo, Luffa cylindrica)‡ | Mexico, Nepal§ | A | Oc | |
| Chili (Capsicum annuum, C. chinense, C. baccatum, C. pubescens, C. frutescens)‡ | Peru§, Mexico | A | Po | |
| Taro (Colocasia esculenta, Xanthosoma spp.)‡ | Nepal, Vietnam | A | Cl | |
| Barley (H. vulgare) | Ethiopia, Morocco | B | In | Yes |
| Durum wheat (Triticum durum) | Morocco | B | In | Yes |
| Pearl millet (Pennisetum glaucum) | Burkina Faso | B | Oc | Yes |
| Bean (P. vulgaris) | Hungary§ | B | In | |
| Maize (Zea mays) | Mexico, Peru | C | Oc | Yes |
| Sorghum (Sorghum bicolor) | Burkina Faso | C | Po | Yes |
| Faba bean (Vicia faba) | Morocco | C | Po | |
| Cassava (Manihot esculenta) | Peru | C | Cl | Yes |
*A, variety names are equal to the units farmers manage; B, variety names underestimate the units farmers are using to manage diversity; C, variety names both overestimate (different names used for the same variety) and underestimate (same name used for different varieties) the units farmers manage. See Sadiki et al. (16) and SI for further details on variety names–units-of-diversity relationships.
†Cl, clonal; In, inbreeding; Po, partially outcrossing; Oc, outcrossing.
‡Beans (common bean, lima bean, and cowpea), chili, squash, and taro are managed as crop complexes. Each crop complex occupies the same ecological and cultural niche and is considered by farmers as a single crop type.
§Average household area planted to traditional varieties of the crop is <50 m2 (i.e., crop is managed as a few plants in home gardens).