摘要
Background: Mutations in mitochondrial tRNA genes have been widely reported association with human reproductions.It is also important to explore the effect on the number of piglets born alive(NBA).Here,1017 sows were used to investigate the association between polymorphisms in mitochondrial tRNA genes and NBA.Results: In total,16 mutations were found in mitochondrial tRNA genes,of which 13 mutations were significantly associated with NBA(P < 0.05).The reproductions of mutant carriers were significantly greater than that of wild carriers by 0.989 piglets born alive/sow farrowing.To test whether the mutations altered the structure of mitochondrial tRNAs,the secondary and tertiary structures were predicted.In result,C2255 T changed the secondary structure of t RNA-Val by elongating the T stem and shrinking the T loop,and C2255 T and G2259 A in the tRNA-Val gene,C6217 T and T6219 C in the tRNA-Ala gene,and T15283 C in the tRNA-Glu gene altered the tertiary structure of their tRNAs,respectively by changing the folding form of the T arm,and C16487 T in the tRNA-Thr gene changed the tertiary structure of mitochondrial tRNA-Thr by influencing the folding form of the acceptor arm.Conclusions: Results highlight the effect of mitochondrial tRNA genes on the number of piglets born alive,and suggest that polymorphic sites of the tRNA genes be genetic markers for selection of pig reproduction.
Background: Mutations in mitochondrial tRNA genes have been widely reported association with human reproductions.It is also important to explore the effect on the number of piglets born alive(NBA).Here,1017 sows were used to investigate the association between polymorphisms in mitochondrial tRNA genes and NBA.Results: In total,16 mutations were found in mitochondrial tRNA genes,of which 13 mutations were significantly associated with NBA(P < 0.05).The reproductions of mutant carriers were significantly greater than that of wild carriers by 0.989 piglets born alive/sow farrowing.To test whether the mutations altered the structure of mitochondrial tRNAs,the secondary and tertiary structures were predicted.In result,C2255 T changed the secondary structure of t RNA-Val by elongating the T stem and shrinking the T loop,and C2255 T and G2259 A in the tRNA-Val gene,C6217 T and T6219 C in the tRNA-Ala gene,and T15283 C in the tRNA-Glu gene altered the tertiary structure of their tRNAs,respectively by changing the folding form of the T arm,and C16487 T in the tRNA-Thr gene changed the tertiary structure of mitochondrial tRNA-Thr by influencing the folding form of the acceptor arm.Conclusions: Results highlight the effect of mitochondrial tRNA genes on the number of piglets born alive,and suggest that polymorphic sites of the tRNA genes be genetic markers for selection of pig reproduction.
基金
supported by the National Key Basic Research Program of China(2014CB138500)
the National Natural Science Foundations of China(31672379 and 31661143013)
