ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2013, Vol. 44 ›› Issue (10): 1561-1568.doi: 10.11843/j.issn.0366-6964.2013.10.008

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Association of Polymorphisms of MBL2 Gene with Semen Quality and Progeny Performance of Bulls

BAI Jing-yan, WU Jie, JIANG Xiao-qiang, WANG Gen-lin*   

  1. (College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095,China)
  • Received:2013-04-12 Online:2013-10-23 Published:2013-10-23

Abstract:

The polymorphisms of MBL2 gene and their correlation to semen quality and progeny performance were investigated in order to find markers for semen quality and progeny performance in Chinese Holstein bulls. The polymorphisms of MBL2 gene were analyzed by the method of PCR-SSCP and sequencing in 218 adult Chinese Holstein bulls. The associations between mutation sites of MBL2 gene and semen quality and progeny performance were analyzed. The results showed that, there were five mutations, g.101 G/A, g.135 C/A, g.136 G/A and g.147 T/C in exon 1 and a novel SNP g.32 C/T in exon 2 (GenBank accession number: KC 832932). The g.101 G/A and g.135 C/A resulted in 31 Arg31 Gln and 42 Pro42 Gln, respectively. The site of g.101 G/A was significantly associated with sperm density (P0.05); the g.135 C/A was significantly associated with sperm motility and sperm density (P0.01); the g.136 G/A and g.147 T/C SNPs had very significant effect on sperm motility, sperm density, estimated breeding value of milk ( EBVM), estimated breeding value of fat (EBVF), estimated breeding value of protein ( EBVP) and estimated breeding value of somatic (EBVS) (P0.05); The g.32 C/T SNP had very significant effect on EBVS (P0.01). Five haplotype combinations were identified in exon 1 and the individuals with MN haplotype combination share the highest sperm motility, sperm density, EBVM, EBVF and EBVP to be positive for semen quality and dairy herd milk performance. The results indicate that the polymorphisms of MBL2 gene is correlated with semen quality and progeny performance in Chinese Holstein bulls.

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