Λεπτομέρειες βιβλιογραφικής εγγραφής
| Τίτλος: |
Genome Analysis and Reproductive Observations Suggest Allotetraploidy and a Potential Reproduction–Metabolism Association in the Endangered Fish Neolissochilus heterostomus. |
| Συγγραφείς: |
Xiao, Tiaoyi, Wu, Zhichao, Li, Dongfang, Qin, Beibei, Tang, Shengguo, Lin, Chengyi, Mao, Kuayun, Yin, Jinwu, Li, Zhihu, Wang, Hongquan, Lv, Zhao |
| Πηγή: |
Fishes (MDPI AG); Jun2026, Vol. 11 Issue 6, p350, 26p |
| Θεματικοί όροι: |
Polyploidy, Tetraploidy, Human reproduction, Endangered species, Genomics, Comparative genomics, Marine fishes, Metabolism |
| Γεωγραφικοί όροι: |
China |
| Περίληψη: |
Neolissochilus heterostomus, a cyprinid fish endemic to Yunnan Province, China, is highly valued for both ornamental and edible purposes, yet its wild populations are currently declining and classified as endangered. In this study, we present a chromosome-level genome assembly of N. heterostomus, utilizing the PacBio HiFi and Hi-C strategies. The assembled genome spans 1793.99 Mb and is anchored to 50 chromosomes, comprising a total of 50,203 genes. Genomic features and chromosomal karyotype data recorded in the present study are consistent with an allotetraploid origin for N. heterostomus. Comparative genomics shows that N. heterostomus shares a close phylogenetic relationship with another allotetraploid fish, the common carp Cyprinus carpio. In total, 4687 expanded and 1365 contracted gene families were identified in N. heterostomus. Further enrichment analyses indicated an overrepresentation of metabolism-related pathways among the expanded and positively selected gene families, whereas the contracted gene families were enriched in reproduction- and embryonic development-related pathways. Reproductive observations further indicate that N. heterostomus produces fewer eggs than other cyprinid species characterized by relatively long embryonic development periods (106.1 h; accumulated temperature: 2260.6 °C·h), including common carp, goldfish (Carassius auratus), grass carp (Ctenopharyngodon idella), pond loach (Misgurnus anguillicaudatus), and blunt snout bream (Megalobrama amblycephala). These findings suggest a potential association between metabolism-related genomic features and reproductive traits, although functional validation remains necessary. Overall, this study may offer insights into the polyploidization, metabolic, and reproductive traits of N. heterostomus, thereby providing genomic and biological resources that may support future studies relevant to the conservation and management of this endangered species. [ABSTRACT FROM AUTHOR] |
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| Βάση Δεδομένων: |
Complementary Index |