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| Screening and Comparison of LncRNAs Related to Body Size Development in Debao Pony (Equus caballus) and Mongolian Horse |
| FANG Jun, LING Yu, PAN Jing, CAO Yu, ZHOU Huan-Min, ZHANG Yan-Ru* |
| College of Life Sciences, Inner Mongolia Agricultural University, Hohhot 010018, China |
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Abstract Debao pony (Equus caballus) is an excellent horse breed in Guangxi of China. It has significant differences in body height compared with other breeds of horses in China. However, the regulation mechanism of body height growth of Debao pony is still poorly understood. This study was carried out from sampling and transcriptome sequencing of Mongolian horse and Debao pony childhood and adulthood pituitary and long bone epiphysis. There were 847 long-chain non coding RNAs (lncRNAs) differentially expressed at different stages of development, including 512 up-regulated and 335 down-regulated; and 1 633 lncRNAs were differentially expressed in different varieties, including 882 up-regulated and 751 down-regulated. In addition, there were 41 lncRNAs differentially expressed in pituitary tissue and 5 lncRNAs in long bone tissue during adult and juvenile development period of Debao pony; 41 lncRNAs were differentially expressed in pituitary tissue and 7 lncRNAs in long bone during the two development period of Mongolian horse. There were 59 lncRNAs differentially expressed in pituitary tissues and 34 lncRNAs in long bone tissues during juvenile period of Mongolian horse and Debao pony; 32 lncRNAs were differentially expressed in pituitary tissues and 35 lncRNAs in long bone tissue during adult period of the two horse breeds. KEGG and Gene Ontology (GO) analyses were performed on the corresponding target genes of these differentially expressed lncRNAs, and the results showed that they were mainly involved in the development of nervous system and endocrine system. According to the function enrichment, pathway enrichment and previous studies of key candidate genes, 20 protein coding genes were screened out, and 13 differentially expressed lncRNAs targeted growth hormone (GH) and insulin-like growth factor-1 (IGF-1) genes by trans action. The results of this study could provide a reference for the study on the mechanism of Debao pony body size development and the breeding of domestic animals targeting dwarfism.
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Received: 08 January 2020
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Corresponding Authors:
*yanru1964@163.com
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