Zhang Yu, Gao Hao, Zhang Fan, Xia Chengxing, Li Guopan, Li Shaobin
College of Life Sciences, Yangtze University, Jingzhou 434025, China.
College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China.
Int J Mol Sci. 2025 Jan 21;26(3):869. doi: 10.3390/ijms26030869.
The chestnut-winged cuckoo () is a bird species known for its brood parasitism, laying eggs in the nests of other bird species. However, there is a paucity of genetic information available for this species and their genus . In this study, we present the first complete mitochondrial genome sequence of . and compare it with other species within the Cuculidae family. The mitogenome is a closed circular molecule consisting of 17,082 bp with an organization typical of the mitochondrial genomes of Cuculidae. Alignment of the control regions across Cuculidae species revealed substantial genetic variation and a significant abundance of AT content. A significant difference was detected in AT-skews between brood-parasitic and parental-care species. A distinctive long poly-C sequence was located at the 5' end of domain I. Phylogenetically, . is more closely related to than . The phylogenetic analysis indicated a general divergence between species with brood parasitism and those with parental care, with transitions between these behaviors within brood parasitism branches, suggesting multiple evolutionary occurrences of these traits. The complete mitogenome of . serves as a valuable resource for further investigation into the taxonomic status and phylogenetic history of species.
栗翅鹰鹃（）是一种以巢寄生行为而闻名的鸟类，会在其他鸟类的巢中产卵。然而，关于该物种及其属的遗传信息却十分匮乏。在本研究中，我们公布了栗翅鹰鹃的首个完整线粒体基因组序列，并将其与杜鹃科内的其他物种进行比较。该线粒体基因组是一个由17,082个碱基对组成的闭合环状分子，具有杜鹃科线粒体基因组的典型结构。对杜鹃科物种控制区的比对揭示了大量的遗传变异以及显著丰富的AT含量。在巢寄生物种和亲代抚育物种之间检测到AT偏斜存在显著差异。在结构域I的5'端发现了一段独特的长聚C序列。在系统发育上，栗翅鹰鹃与[物种名1]的亲缘关系比与[物种名2]更近。系统发育分析表明，巢寄生物种和亲代抚育物种之间存在普遍的分化，并且在巢寄生分支内这些行为之间存在转变，这表明这些特征有多次独立的进化事件。栗翅鹰鹃的完整线粒体基因组为进一步研究栗翅鹰鹃物种的分类地位和系统发育历史提供了宝贵资源。
