Population genetical study of natural hybridization betweenPapio anubis andP. hamadryas

Abstract

The natural hybridization between Papio anubis and P. hamadryas in central Ethiopia was studied from a population genetical perspective. Studies were made using electrophoretical blood protein variations as markers in order to clarify the genetic relationship between them. A total of 563 samples from ten populations which were collected in the field studies with a socioecologist in 1976 and 1979 were examined for 34 blood protein loci. Ten of the 34 loci showed polymorphism. The Tf, PA-2 and Es were found to be effective for discriminating between the anubis and hamadryas. Genetic variability, hybridization rate, genetic distance, migration rates and correlations between genetical and morphological and between genetical and behavioral indices were computed and analyzed.

High Prevalence of Simian T-Lymphotropic Virus Type L in Wild Ethiopian Baboons

“…Seropositive anubis baboons were exclusively infected with STLV-1, and no seropositive samples were obtained from gelada. It is important to note that the hamadryas baboons we tested are a pure population, as determined by genetic studies (25). Thus, these results suggest that STLV-L in hybrid baboons originated from hamadryas baboons.…”

“…Hybridization between these subspecies frequently occurs in boundary areas in which these two baboons are cohabiting (25). In addition to hamadryas baboons, we tested the prevalence of STLV-L among anubis baboons and hybrid baboons.…”

“…When the blood samples were taken, they were divided into blood cells and plasma and stored at Ϫ80°C. The 519 animals consisted of 40 hamadryas baboons (Papio hamadryas hamadryas), 96 anubis baboons (Papio hamadryas anubis), 50 baboons that were hybrids between hamadryas baboons and anubis baboons (25), 156 gelada baboons (Theropithecus gelada) (26), and 177 grivet monkeys (Cercopithecus aethiops) (24). The locations at which the monkeys were sampled are shown in Fig.…”

“…This country is inhabited not only by hamadryas baboons but also different monkey species. It is noteworthy that there are several natural colonies of baboons that are hybrids between hamadryas and anubis baboons, which have been established and separated for a long time from both the parental subspecies (25). We aimed to determine whether the hamadryas baboon is truly infected with STLV-L under natural condition and whether STLV-L infection is prevalent among other NHP species.…”

Natural hybridization in primates: One evolutionary mechanism

“…In addition, the entire tribe Papionini, which also includes the geladas (Theropithecus), drills and mandrills (Mandrillus), and mangabeys (Cercocebus, Lophocebus) demonstrates genetic and phylogenetic patterns indicative of reticulate evolution (e.g. Shotake et al, 1977;Shotake, 1981;Jolly et al, 1997;Harris and Disotell, 1998;Szmulewicz et al, 1999;Alberts and Altmann, 2001;Dirks et al, 2002;Newman et al, 2004). This conclusion (i.e.…”