中文内容为资料集译写。每条说明所依据的摘要或正文范围。 / Chinese text is prepared for this collection. Summary evidence is identified for each entry.
Nature全文 PDF小体鲟基因组序列与片段性再二倍体化机制
The sterlet sturgeon genome sequence and the mechanisms of segmental rediploidization
Nature ecology & evolution · 2020
依据索引收录的作者摘要概括。
Summary based on the indexed author abstract.
主要发现 Key findings
小体鲟基因组揭示侏罗纪全基因组复制、较低蛋白演化速率，以及通过整条染色体丢失发生的片段性再二倍体化。
The sterlet genome reveals Jurassic whole-genome duplication, slow protein evolution and segmental rediploidization involving loss of entire chromosomes.
结论 Conclusions
鲟鱼保留了长期的结构与功能四倍体特征，重复基因组的简化并非迅速而整齐完成。
Sturgeons retain long-lasting structural and functional tetraploidy; duplicated-genome reduction was neither rapid nor uniform.
PNAS全文 PDF古代脊椎动物皮骨甲源自躯干神经嵴
Ancient vertebrate dermal armor evolved from trunk neural crest.
Proceedings of the National Academy of Sciences of the United States of America · 2023
摘要解读依据已查看的索引作者摘要；如已保存全文，可用于进一步阅读。
Summary based on the inspected indexed author abstract; archived full text, when available, is provided for further reading.
主要发现 Key findings
活体谱系追踪显示，小体鲟躯干神经嵴细胞形成骨板成骨细胞。鲟骨板与多鳍鱼鳞片的转录证据以及皮骨甲比较成像，支持神经嵴对祖先骨骼组织作出广泛贡献。
In vivo lineage tracing showed that sterlet sturgeon trunk neural crest cells generate scute osteoblasts. Transcriptional evidence in sturgeon scutes and bichir scales and comparative imaging of dermal armour support a broad neural-crest contribution to ancestral skeletal tissues.
结论 Conclusions
神经嵴可能原本沿全身轴具有成骨作用，后来才更局限于头部；鲟鱼由此为脊椎动物皮骨甲起源提供发育证据。
Neural crest likely had an ancestral skeletogenic role along the body axis that became more cranially restricted later. Sturgeon therefore provides developmental evidence relevant to the origin of vertebrate dermal armour.