Abstract
Lysine demethylase 6A (KDM6A), as a candidate gene associated with skeletal dysplasia and the differentiation of osteogenesis, might affect the growth traits in animals. In the previous study (Cui et al., 2018), one 16 bp intronic insertion/deletion (NW_017189516.1: g.138, 431_138,446delAATGTATAGCTTAAAA) within the KDM6A gene significantly influenced KDM6A gene expression. The objective of this work was to investigate the association between this 16 bp indel and growth-related traits in Shaanbei White Cashmere goat (SWCG). Association analyses showed the 16 bp indel was related to growth traits strongly (body height, chest depth, height across the hip, body length and chest circumference) in SWCG population (n = 1953, P < 0.05). Insertion/insertion (II) genotype individuals (n = 1502) had the best growth traits, by comparison of those of insertion/deletion (ID) (n = 410) and the deletion/deletion (DD) genotypes (n = 41). Particularly, the body weight of II genotype individuals were significantly higher than ID and DD genotypes (P < 0.01). Besides, the remarkable influence of this indel on traits might cause by the change of MEF2 binding site. These findings hinted that the 16 bp deletion mutation in KDM6A gene, which was significantly associated with growth-related traits, could be assigned to an effective molecular marker for growth traits in goat breeding.
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