@article{fdi:010042619, title = {{R}ole of seed flow on the pattern and dynamics of pearl millet ({P}ennisetum glaucum [{L}.] {R}. {B}r.) genetic diversity assessed by {AFLP} markers : a study in south-western {N}iger}, author = {{A}llinne, {C}. and {M}ariac, {C}{\'e}dric and {V}igouroux, {Y}ves and {B}ezan{\c{c}}on, {G}illes and {C}outuron, {E}mmanuel and {M}oussa, {D}jibo and {T}idjani, {M}oussa and {P}ham, {J}ean-{L}ouis and {R}obert, {T}.}, editor = {}, language = {{ENG}}, abstract = {{W}e studied the regional genetic diversity and seed exchange dynamics of pearl millet landraces in southwestern {N}iger. {T}he genetic study was based on {AFLP} markers. {W}e found significant genetic differentiation between landraces in different geographical areas of southwestern {N}iger. {H}owever, the degree of differentiation was low insofar as only 1.9% of the total molecular diversity was due to regional differentiation, suggesting a relatively high gene flow. {A}nthropologic studies on farming practices have suggested that seed exchanges between farmers on a large geographical scale probably make a considerable contribution to this result. {I}n order to test this hypothesis, the effects of seed exchange on the genetic diversity of landraces was analyzed on seed samples from two distant villages in contrasting areas of south-western {N}iger. {S}eeds imported by farmers into the southern village of {S}ina {K}oara did not differ significantly from locally grown landraces. {B}y contrast, in the northern village of {A}lzou, several samples were genetically different from locally grown landraces and closer to southern accessions. {T}hese data suggest that the seed flow is preferentially from south to north, i.e. from an area with more favorable rainfall conditions. {T}he potential consequences for the genetic diversity and adaptation of northern pearl millet landraces are discussed.}, keywords = {{P}ennisetum glaticum ; pearl millet ; genetic diversity ; {AFLP} ; seed exchange ; gene flow ; niger}, booktitle = {}, journal = {{G}enetica}, volume = {133}, numero = {2}, pages = {167--178}, ISSN = {0016-6707}, year = {2008}, DOI = {10.1007/s10709-007-9197-7}, URL = {https://www.documentation.ird.fr/hor/fdi:010042619}, }