Department of Biology, Utah State University, Logan, UT 84322-5305, USA.
J Hered. 2010 Nov-Dec;101(6):703-9. doi: 10.1093/jhered/esq082. Epub 2010 Jul 19.
Many species of frog exhibit striking color and pattern polymorphisms, but the genetic bases of these traits are not known for most species. The coqui frog, Eleutherodactylus coqui, a species endemic to the island of Puerto Rico, exhibits a wide variety of color and pattern polymorphisms including 4 discrete stripe patterns on its dorsal surface and an unstriped morph. We conducted breeding experiments to determine the mode of inheritance for these 5 dorsal color patterns in E. coqui. We analyzed results from 14 different cross types, which included 1519 offspring from 71 clutches. We found that color patterns segregate at ratios consistent with a single autosomal locus, 5-allele model, in which all alleles coding for stripes are codominant and the allele coding for the unstriped morph is recessive. We propose that this locus be named "stripes" with alleles B (interocular bar), L (dorsolateral stripes), N (narrow middorsal stripe), W (wide middorsal stripe), and u (unstriped). The results of this experiment suggest the genetic basis of stripe patterns in this well-studied species and provide a model for studying the evolution and maintenance of this phenotypic polymorphism.
许多青蛙物种表现出显著的颜色和图案多态性，但大多数物种的这些特征的遗传基础尚不清楚。波多黎各特有物种 coqui 青蛙（Eleutherodactylus coqui）表现出多种颜色和图案多态性，包括其背部表面的 4 种不同条纹图案和无条纹形态。我们进行了繁殖实验，以确定 E. coqui 中这 5 种背部颜色图案的遗传模式。我们分析了 14 种不同杂交类型的结果，其中包括 71 个卵囊中 1519 只后代。我们发现颜色图案的分离比例与单个常染色体座位的 5 等位基因模型一致，在该模型中，编码条纹的所有等位基因都是共显性的，编码无条纹形态的等位基因是隐性的。我们建议将这个基因座命名为“条纹”，其等位基因分别为 B（眼间条纹）、L（背侧条纹）、N（窄中背条纹）、W（宽中背条纹）和 u（无条纹）。该实验的结果表明了这个研究充分的物种中条纹图案的遗传基础，并为研究这种表型多态性的进化和维持提供了模型。
