LTHOUGH close inbreeding does divide a population up into lines, members A of which are in general very similar-wRIGHT claims there was never any difficulty in telling to which of his 23 lines of inbred guinea pigs any individual guinea pig belonged-it has often been observed that some characters in some lines become more variable with inbreeding. The characters for which this has been found to...

• Shank length is positively correlated with the husk length, number, ear and weight, but negatively width. highly heritable, 10 quantitative trait loci for shank were identified in three RIL populations. Five candidate genes may affect hormone metabolism sphingolipid biosynthesis to regulate cell elongation, division so on. In maize, a unique tissue linking stem ear. (SL) mainly affects transp...

Both epigenetic alterations and genetic variations play essential roles in tumorigenesis. The epigenetic modification of DNA methylation is catalyzed and maintained by the DNA methyltransferases (DNMT3a, DNMT3b and DNMT1). DNA mutations and DNA methylation profiles of DNMTs themselves and their relationships with chicken neoplastic disease resistance and susceptibility are not yet defined. In t...

Varicella-zoster virus was serially propagated in a chemically transformed and cloned line of embryo cells (designated "104 C1") derived from the inbred strain 2 guinea pig. When strain 2 guinea pigs were immunized with varicella-zoster virus subcultivated in the syngeneic cell line, they produced high-titer virus-specific antiserum which lacked antibody against cellular determinants. This immu...