naa a22 4500 510730345 CHVBK 20180411082950.0 cr unu---uuuuu 180411e20130201xx s 000 0 eng 10.1007/s11295-012-0537-0 doi (NATIONALLICENCE)springer-10.1007/s11295-012-0537-0 Highlighting the occurrence of tetraploidy in Acacia senegal (L.) Willd. and genetic variation patterns in its natural range revealed by DNA microsatellite markers [Elektronische Daten] [A. Assoumane, A. Zoubeirou, M. Rodier-Goud, B. Favreau, G. Bezançon, D. Verhaegen] Acacia senegal (L.) Willd. is the main species producing the internationally traded gum arabic. Genetic studies of this species are rare and until now the chromosome number was thought to be diploid (2n = 2x = 26). Here, using chromosome number counting, we demonstrate for the first time that tetraploids (2n = 4x = 52) also occur in A. senegal. Nuclear and chloroplast microsatellite markers were used to estimate and compare genetic variation within this newly described polyploidy complex in the Sudano-Sahelian region in Africa. Genetic diversity was higher in diploids, suggesting that the formation of tetraploids is recent and that mutation-drift equilibrium has not yet been reached. The two cytotypes do not have the same genetic structure and are genetically differentiated. Among tetraploids, populations are greatly differentiated and do not share the same chlorotypes. Based on these results, we discuss recurrent formation of tetraploids from different diploid progenitors across the distribution range of A. senegal in the Sudano-Sahelian zone. Springer-Verlag, 2012 Acacia senegal nationallicence In situ hybridization nationallicence Polyploid complex nationallicence Genetic diversity nationallicence Genetic structure nationallicence SSR markers nationallicence Assoumane A. CIRAD-Bios, UMR AGAP « Genetic diversity and breeding of forest trees », Baillarguet TA A-108/C, 34398, Montpellier Cedex 5, France aut Zoubeirou A. Faculté des Sciences, Université Abdou Moumouni, BP 10662, Niamey, Niger aut Rodier-Goud M. CIRAD-Bios, UMR DAP, TA-A 96/03, Avenue Agropolis, 34398, Montpellier Cedex 5, France aut Favreau B. CIRAD-Bios, UMR AGAP « Genetic diversity and breeding of forest trees », Baillarguet TA A-108/C, 34398, Montpellier Cedex 5, France aut Bezançon G. IRD Représentation du Niger, 276 Avenue de Maradi, BP 11416, Niamey, Niger aut Verhaegen D. CIRAD-Bios, UMR AGAP « Genetic diversity and breeding of forest trees », Baillarguet TA A-108/C, 34398, Montpellier Cedex 5, France aut Tree Genetics & Genomes Springer-Verlag 9/1(2013-02-01), 93-106 1614-2942 9:1<93 2013 9 11295 https://doi.org/10.1007/s11295-012-0537-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11295-012-0537-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Assoumane A. CIRAD-Bios, UMR AGAP « Genetic diversity and breeding of forest trees », Baillarguet TA A-108/C, 34398, Montpellier Cedex 5, France aut NATIONALLICENCE 700 1- Zoubeirou A. Faculté des Sciences, Université Abdou Moumouni, BP 10662, Niamey, Niger aut NATIONALLICENCE 700 1- Rodier-Goud M. CIRAD-Bios, UMR DAP, TA-A 96/03, Avenue Agropolis, 34398, Montpellier Cedex 5, France aut NATIONALLICENCE 700 1- Favreau B. CIRAD-Bios, UMR AGAP « Genetic diversity and breeding of forest trees », Baillarguet TA A-108/C, 34398, Montpellier Cedex 5, France aut NATIONALLICENCE 700 1- Bezançon G. IRD Représentation du Niger, 276 Avenue de Maradi, BP 11416, Niamey, Niger aut NATIONALLICENCE 700 1- Verhaegen D. CIRAD-Bios, UMR AGAP « Genetic diversity and breeding of forest trees », Baillarguet TA A-108/C, 34398, Montpellier Cedex 5, France aut NATIONALLICENCE 773 0- Tree Genetics & Genomes Springer-Verlag 9/1(2013-02-01), 93-106 1614-2942 9:1<93 2013 9 11295 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer