3CASSADY J P,JOHNSON R K,POMP D,et al.ldentification of quantitative trait loci affeeting reproduetion in pigs[J].Journal of Animal Scienc,2001,79(3):623- 633.
4KNOTF S A, MARKLUND L, HALEY C S,et aI.Multiple marker mapping of quantitative trait loci in a cross between outbred wild boar and large white pigs[J]. Genetics,1998, 149(2):1069- 1080.
6BORCHERS N,REINSCH N,KALM E.Teat number, hairiness and set of ears in a Pietrain cross;variation and effects on performance traits[J]. ARCHIV FUR TIERZUCHT,2002, 45(5):465 -480.
10HIROOKA H,DE KONING DJ,HARLIZIUS B,et al.A whole genome scan for quantitative trait loci affecting teat number in pigs[J].Journai of animal science, 2001, 79(9):2320-2326.