Principal Component Analysis for a) several African populations and b) Guinea-Bissau ethnic clusters, based on haplogroup frequencies. a) The 1st PC captures 42.6% of the variance and 16.9% are under the responsibility of the 2nd PC. For details on populational datasets see <a rel="nofollow" class="external text" href="http://bmcevolbiol.biomedcentral.com/articles/10.1186/1471-2148-7-124#MOESM2">Additional file 2</a>. The codes in italic refer to the following populations: Morocco Arabs: Ar [1,34], Mar [33]; Morocco Berbers: Bb [33], MBb [34]; Algeria: Alg [80], Aar-Algerian Arabs [35]; Tunisia-Tun1 [35], Tun2 [7]; West Sahara: Sah-Saharawis [33]; Egypt: Egy1 [35], Egy2 [7]; Sudan: Sud [2]; Ethiopia: Eth [2], Or-Oromo, Amh-Amhara [5,7]; Kenya: K&amp;K-Kikiu &amp; Kamba, Maa-Maasai [7]; Uganda: Gan-Ganda [7]; North Cameroon: Po-Podokwo, Mad-Mandara [7], Ou-Ouldeme, Daba [1,7,26], NCAdaw-Fali, Tali [1,26], Fca-Fulbe [1,26]; South Cameroon: SCBantu-Bassa, Ngoumba [7], Bak-Bakaka, [1,7], Bam-Bamileke [1,26], Ewo-Ewondo [1,26], Bko-Bakola Pygmies [7]; CAR: Bik-Biaka Pygmies [2,7]; DRC: DRCBantu-Nande, Herna [7]; Mb-Mbuti Pygmies [2,7]; Guinea-Bissau: EJA-Felupe-Djola, BJG-Bijagós, BLE- Balanta, PBO-Papel, FUL-Fulbe, MNK-Mandenka, NAJ-Nalú (Present study); Burkina Faso: Mo-Mossi [1,26], Ri-Rimaibe [1,26], FBF-Fulbe [1,26]; Gambia/Senegal: Wo-Wolof [7], Mak-Mandinka [7]; Mali: Mal [2], Do-Dogon [7]; Ghana: Ewe, Ga, Fan-Fante [7]; Senegal: Se [5]; Namibia: Her-Herero, Amb-Ambo [7], Ku-!Kung, Sekele [1,7,26], CKh-Tsumkwe San, Dama, Nama [7]; South Africa: ST-Sotho-Tswana, Zu-Zulu, Xh-Xhosa, Sh-Shona [7], Kho-Khoisan [2]. b) The PCA captures 87.0% of the variance with 74.0% and 13.0% attributed to the 1st and 2nd PC, respectively. The 1st PC reflects an axial proportion of E3a* vs. E1* where Papel and Felupe-Djola retain the higher proportions of the later. E3a* is again a main influence in the 2ndaxis against that of R1b and E3b1, placing Mandenka apart from Bijagós and Fulbe.
Ana M GonzálezEmail author, Oscar García, José M Larruga and Vicente M Cabrera
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Rosa A, Ornelas C, Jobling MA, Brehm A, Villems R. Y-chromosomal diversity in the population of Guinea-Bissau: a multiethnic perspective. BMC Evolutionary Biology. 2007;7:124. doi:10.1186/1471-2148-7-124. <a rel="nofollow" class="external free" href="http://bmcevolbiol.biomedcentral.com/articles/10.1186/1471-2148-7-124">http://bmcevolbiol.biomedcentral.com/articles/10.1186/1471-2148-7-124</a>