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Farmers' Seed Systems and Management Practices Determine Pearl Millet Genetic Diversity Patterns in Semiarid Regions of India

^a Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD) 01 BP. 596, Ouagadougou 01, Burkina Faso
^b Univ. of Hohenheim, 430A Institute for Social Sciences of the Agricultural Sector, Dep. of Communication and Extension, D-70593 Stuttgart, Germany
^c International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), B.P. 320, Bamako, Mali
^d Univ. of Hohenheim, 350b Institute of Plant Breeding, Seed Science and Population Genetics, D-70593 Stuttgart, Germany

View larger version (59K): [in a new window]   Fig. 1. Map of Rajasthan. Numbers identify collection sites and population samples WLR1–WLR14 and ELR23–ELR35.

View larger version (25K): [in a new window]   Fig. 2. UPGMA dendrogram illustrating the genetic distances (ST values) among 39 pearl millet cultivars estimated from 235 AFLP markers. Cultivars consisted of landraces from western (WLR) and eastern (ELR) Rajasthan, full-sib family populations from western Rajasthan (FS), improved open-pollinated cultivars (OPC), African landraces (ALR), and Hybrids (HY).

View larger version (11K): [in a new window]   Fig. 3. Relationship between gene flow (Nem estimates) and geographic distance (km) among western Rajasthan landraces. Logarithmic scales (to the basis 10) are used for both variables.

View larger version (15K): [in a new window]   Fig. 4. Relationship between gene flow (Nem estimates) and geographic distance (km) among eastern Rajasthan landraces. Logarithmic scales (to the basis 10) are used for both variables.