尽管异常分化,但某些物种仍能够杂交。生殖隔离积累的这种变化的原因仍然知之甚少,和驯化作为生殖隔离的动力或障碍仍然有待表征。在这项研究中,我们研究了发散时间的作用,驯化,和形态学上的错配,栖息地,和杂种之间的离合器大小在鸟类中繁殖隔离。我们从文献中汇编并分析了杂交发生的情况,并记录了合子生殖分离的措施。我们使用了文本挖掘方法,利用历史上的养鱼杂志来量化物种间的驯化程度。我们得到了发散时间,形态学,栖息地,和来自开源的离合器尺寸数据。我们发现了123个物种对(涉及77个物种)具有已知的后代生育能力(不育,只有雄性肥沃,或两性均可生育)。我们发现分歧时间和离合器大小是生殖隔离的重要预测因子(麦克法登的伪R2=0.59),但不是栖息地或形态不匹配。也许最有趣的是,在修正系统发育后,我们发现驯化和生殖相容性之间存在显著的关系,删除极端值,和寻址潜在偏差(F1,74=5.43,R2=0.06,P值=0.02)。我们推测,与驯化相关的选择性生殖系统的遗传结构和破坏可能会影响生殖隔离,使驯化的物种更加繁殖不稳定。
Some species are able to hybridize despite being exceptionally diverged. The causes of this variation in accumulation of reproductive isolation remain poorly understood, and domestication as an impetus or hindrance to reproductive isolation remains to be characterized. In this study, we investigated the role of divergence time, domestication, and mismatches in morphology, habitat, and clutch size among hybridizing species on reproductive isolation in the bird order Galliformes. We compiled and analyzed hybridization occurrences from literature and recorded measures of postzygotic reproductive isolation. We used a text-mining approach leveraging a historical aviculture magazine to quantify the degree of domestication across species. We obtained divergence time, morphology, habitat, and clutch size data from open sources. We found 123 species pairs (involving 77 species) with known offspring fertility (sterile, only males fertile, or both sexes fertile). We found that divergence time and clutch size were significant predictors of reproductive isolation (McFadden\'s Pseudo-R2 = 0.59), but not habitat or morphological mismatch. Perhaps most interesting, we found a significant relationship between domestication and reproductive compatibility after correcting for phylogeny, removing extreme values, and addressing potential biases (F1,74 = 5.43, R2 = 0.06, P-value = 0.02). We speculate that the genetic architecture and disruption in selective reproductive regimes associated with domestication may impact reproductive isolation, causing domesticated species to be more reproductively labile.