1.一种鉴别中国地方猪抗F4ac仔猪腹泻的分子标记，其特征在于：如下所示的DNA序列第183个核苷酸处为A183-G183的碱基突变，包括碱基A和碱基G的情形：

tgttagaaag tccttgggct ttaacccaaa taacactgct gtaactttaa aggggacttt 60tttttattca gaattatgaa tagatttgtt tctaggactc taagtcctat acctgctccc 120tcctcagtaa agttcataaa cttcgtttct ctagctaagg tttagattgg aagacataca 180ccrtgaaatt attattaagc ttatttcctc ttcctaagaa cataaataaa agcaacgctc 240tgtcttctgg ctttgagtca ccagatagaa gctagttaca tgccaaactt actaataaac 300ttattataga ttcttggcaa ttaatatact tttggagcct gcatcacctc tgttaaaatc 360aatattagca gcaaaagttt catgattgca cagtccaagt tttttaaagt aaagatttgt 420atttgtttgt tcataaaagt agtacagctc tactcccagc aatatggcag aagagacaaa 480cctttaacta gagaacatgc aaatgccaga taatgtgtaa taaatatttt ctgaatgctg 540agctgagatc cgaagaaaga aagggagacg ctcaggagtg aaggagttga aaactaagat 600gataagtaag tgctctcata caatttggag atttctgaga tctagagttt ggcattttaa 660tggctgcatg gagaaaggaa acaatcttag atcaggacac tgtagactga atattttctg 720cataaagctg gaaacctcag tgaaaaggtg gtctagaaaa atcaaaaaga aaaaagaaaa 780aggaggagtt ccctggtggc tcagtgggtt aaggatccag cgttttcact gctggggctc 840tggttactgc tgag。

2.根据权利要求1所述的可鉴别中国地方猪抗F4ac仔猪腹泻的分子标记在选育改良中国地方猪种种猪抗腹泻病性状中的应用。