<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">van Hooft, Pim</style></author><author><style face="normal" font="default" size="100%">Prins, Herbert H T</style></author><author><style face="normal" font="default" size="100%">Getz, Wayne M</style></author><author><style face="normal" font="default" size="100%">Jolles, Anna E</style></author><author><style face="normal" font="default" size="100%">van Wieren, Sipke E</style></author><author><style face="normal" font="default" size="100%">Greyling, Barend J</style></author><author><style face="normal" font="default" size="100%">van Helden, Paul D</style></author><author><style face="normal" font="default" size="100%">Bastos, Armanda D S</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Rainfall-driven sex-ratio genes in African buffalo suggested by correlations between Y-chromosomal haplotype frequencies and foetal sex ratio.</style></title><secondary-title><style face="normal" font="default" size="100%">BMC evolutionary biology</style></secondary-title><alt-title><style face="normal" font="default" size="100%">BMC Evol. Biol.</style></alt-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Animals</style></keyword><keyword><style  face="normal" font="default" size="100%">Buffaloes</style></keyword><keyword><style  face="normal" font="default" size="100%">Climate</style></keyword><keyword><style  face="normal" font="default" size="100%">Female</style></keyword><keyword><style  face="normal" font="default" size="100%">Fetus</style></keyword><keyword><style  face="normal" font="default" size="100%">Haplotypes</style></keyword><keyword><style  face="normal" font="default" size="100%">Male</style></keyword><keyword><style  face="normal" font="default" size="100%">Microsatellite Repeats</style></keyword><keyword><style  face="normal" font="default" size="100%">Sex Ratio</style></keyword><keyword><style  face="normal" font="default" size="100%">South Africa</style></keyword><keyword><style  face="normal" font="default" size="100%">Y Chromosome</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2010</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2010</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">10</style></volume><pages><style face="normal" font="default" size="100%">106</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The Y-chromosomal diversity in the African buffalo (Syncerus caffer) population of Kruger National Park (KNP) is characterized by rainfall-driven haplotype frequency shifts between year cohorts. Stable Y-chromosomal polymorphism is difficult to reconcile with haplotype frequency variations without assuming frequency-dependent selection or specific interactions in the population dynamics of X- and Y-chromosomal genes, since otherwise the fittest haplotype would inevitably sweep to fixation. Stable Y-chromosomal polymorphism due one of these factors only seems possible when there are Y-chromosomal distorters of an equal sex ratio, which act by negatively affecting X-gametes, or Y-chromosomal suppressors of a female-biased sex ratio. These sex-ratio (SR) genes modify (suppress) gamete transmission in their own favour at a fitness cost, allowing for stable polymorphism.</style></abstract><custom1><style face="normal" font="default" size="100%">http://www.ncbi.nlm.nih.gov/pubmed/20416038?dopt=Abstract</style></custom1></record></records></xml>