The invention relates to a method for breeding lean-type Chinese Huai pigs in a multi-
gene pyramiding manner based on growth traits thereof. The method comprises the following operating steps: 1, carrying out
DNA (deoxyribonucleic acid) extraction on the
genome of the pig; 2, designing primers, more particularly, designing the PCR (
polymerase chain reaction) amplification primers according to the
gene sequences of
insulin-like
growth factor-I (IGF-I), pituitary specific
transcription factor-I (PIT-I),
liver X receptor alpha (LXR alpha) and
melanocortin-4
receptor (MC4R); 3, carrying out the PCR; 4, carrying out
restriction fragment length polymorphism (RFLP); and 5, carrying out the
correlation analysis on the polymorphism and growth traits of genes. According to the analysis, the method can determine that the single growth rate of the pyramided
gene with the
gene type thereof being AADDGGFF is the highest one; the method can prevent the genes of other offsprings from being isolated after the selective reservation for breeding, thus achieving the optimal effect of the growth traits of the offsprings on the four gene types; and the method can stabilize the inheritance, particularly lead the genes of the growth traits to become homozygous within one generation, thus accelerating the cultivation of the lean-type Chinese Huai pigs.