当前位置: X-MOL 学术Comp. Biochem. Physiol. B Biochem. Mol. Biol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Disruptions of feather carotenoid pigmentation in a subset of hybrid northern flickers (Colaptes auratus) may be linked to genetic incompatibilities
Comparative Biochemistry and Physiology B: Biochemistry & Molecular Biology ( IF 2.2 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.cbpb.2020.110510
Jocelyn Hudon , Karen L. Wiebe , Riccardo Stradi

Hybridization can bring in single individuals alleles that were never designed to work together, which can result in unexpected or transgressive phenotypes. The Yellow-shafted (auratus group) and Red-shafted (cafer group) subspecies groups of the Northern Flicker (Colaptes auratus) differ conspicuously in the coloration of their flight feathers, but hybridize freely where their ranges overlap in western North America. The difference in color is largely the result of the Red-shafted form harboring ketolated products at C4(4′) of the carotenoids found in the Yellow-shafted form. Characterizing the carotenoid pigments in a series of birds of intermediate color (presumed hybrids) revealed that most accumulated a product of β-cryptoxanthin with a keto group on its hydroxylated ring (3-hydroxy-echinenone), while a few accumulated the product with a keto group on the unhydroxylated ring (3′-hydroxy-echinenone). Surprisingly, the latter group also had feather barbs that were noticeably yellower than the associated rachis, corresponding to a lower level of ketolation at C4(4′). We assessed possible biochemical explanations for the differences by probing the relative carotenoid concentration data in individuals of varying color. The difference between the hybrids could not be explained by the general level of ketolation of carotenoids or a particular selectivity of the 4-ketolase involved. We present a testable genetic explanation that invokes incompatibilities between divergent alleles of the two parental forms at interacting loci. Because the idiosyncrasies affect oxidation, they may be the product of mitonuclear incompatibilities.



中文翻译:

杂交北闪烁的一个亚群(Colaptes auratus)中羽毛类胡萝卜素色素的破坏可能与遗传不相容有关。

杂交可以引入从未设计为共同起作用的单个等位基因,这可能会导致意想不到的或过犯的表型。北部忽悠(Colaptes auratus)的黄轴(金龟组)和红轴(cafer组)亚种)的飞行羽毛颜色明显不同,但在北美西部重叠的地方自由杂交。颜色上的差异很大程度上是由于红轴形式在黄色轴形式的类胡萝卜素的C4(4')处带有酮化产物。对一系列中间颜色的鸟类(推测为杂种)中的类胡萝卜素色素进行表征,发现大多数化合物在其羟基化环上积聚了带有酮基的β-隐黄质产物(3-羟基-海one烯酮),而少数则积聚了带有β-隐黄质的产物。未羟基化环上的酮基(3'-羟基-chin烯酮)。出人意料的是,后一组还具有明显比相关联的羽轴更黄的羽毛倒钩,对应于C4(4')处较低的酮化水平。我们通过探测不同颜色个体的相对类胡萝卜素浓度数据,评估了差异的可能的生化解释。杂种之间的差异不能通过类胡萝卜素的酮化的一般水平或所涉及的4-酮醇酶的特定选择性来解释。我们提出了一个可测的遗传解释,该解释在相互作用的基因座上调用两个亲本形式的不同等位基因之间的不相容性。因为特质影响氧化,所以它们可能是微核不相容性的产物。我们提出了一个可测的遗传解释,该解释在相互作用的基因座上调用两个亲本形式的不同等位基因之间的不相容性。因为特质影响氧化,所以它们可能是微核不相容性的产物。我们提出了一个可测的遗传解释,该解释在相互作用的基因座上调用两个亲本形式的不同等位基因之间的不相容性。因为特质影响氧化,所以它们可能是微核不相容性的产物。

更新日期:2020-10-06
down
wechat
bug