Study On Reproductive Performance Of Swine Related Genes Or Molecular Markers

Sow fertility largely determines the economic efficiency of pig farm,that is very important. The reproductive traits by several minor genes controlling quantitative traits, is a low heritability traits, using conventional breeding methods in a relatively short time is difficult to achieve significant progress, which limits the development of pig breeding in large part. Currently, molecular breeding pigs at home and abroad, and is mainly used in the conventional method and single-assisted selection markers, and theory and technology to study gene pyramiding is still lagging behind. Since 1909, the Swedish biologist H. Nilsson El proposed Polygene hypothesis since polygenic quantitative traits has been as a whole to use statistical methods to genetic research and analysis. At present, the localization of quantitative trait loci main methods genome scanning and candidate gene approach, expect to find the master gene controlling litter size, thus providing a new way for the genetic improvement of porcine reproductive traits. Detection and localization of major genes of quantitative traits pig fertility has made significant progress, such as the estrogen receptor gene, porcine follicle stimulating hormone 8 subunit genes have been widely accepted by scholars, and has already begun in breeding and production Practical application.In the breeding of pigs which, fecundity is an important factor affecting pig breeding, such as through detection of relevant marker genes, gene pyramiding to a plurality of species which will greatly speed up the breeding process. This study will use mass-ARRAY-TOF-MS analysis and determination of genetic traits combined data, choosing 5 genes 6 loci, such as BMP2, ESR1, EPOR, FUT1, PRLR, analyzed of 338 individual different genotypes and genotype combinations contribution rate of fecundity, using the chi-square test and LS model Y μFarmBreed ++++=eMar ker analysis. The results show that, there are significant differences in the genes of BMP2, ESR1-1, ESR1-2 in this population. It can detect genotypes guide breeding. Also found that BMP2 associated with reproductive traits significantly.