Correlation and regression analysis of GH and IGF-1 genes in Liaoning cashmere goats with body size and other production performance.

Liaoning cashmere goat is an important livestock breed in the world. Its economic value is not only reflected in the production of high-quality cashmere, but also its meat production performance is increasingly attracting attention. In order to more comprehensively explore the economic traits of Liaoning cashmere goats, we mainly carry out research on increasing the body size and meat production performance of Liaoning cashmere goats. In the early stage, through multi-omics joint analysis of muscle tissues at different parts and different developmental stages, the important functional genes GH and IGF-1 for growth and development were determined. Then, genotyping of DNA in the experimental population and correlation analysis between SNP and production performance were carried out by PCR-seq. One SNP site G350A was detected in the GH gene. Only one genotype AG was identified in rams. In ewes, the GG genotype is the dominant genotype for body size and production performance, and the AG genotype is the dominant genotype for slaughter production performance. One SNP site C5464T was detected in the IGF-1 gene. In rams, the TT genotype is the dominant genotype for body size and slaughter production performance. In ewes, the CT genotype is the dominant genotype for body size and slaughter production performance. The dominant haplotype combination for body size and slaughter production performance of rams is AGTT. The dominant haplotype combination for body size production performance of ewes is GGCT, and the dominant haplotype combination for slaughter performance is AGCT. This study provides a theoretical basis for genetic improvement and breeding programs of Liaoning cashmere goats.