摘要:

SummaryThe relationship was investigated between performance differences, and genetic distance between parental breeds, and heterosis increment in milk and fat yield. Heterosis increments were positively correlated with both yield difference and genetic distance but only the relation between heterosis of fat yield and genetic distance between parental breeds was statistically significant. It appears that measures of genetic distance could provide a useful tool in selecting breeds for crossbreeding.

ISSN:0003-3480    

DOI:10.1111/j.1365-2052.1984.tb01114.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

SummaryIn a recent paper we gave evidence by two‐dimensional electrophoresis that, in man, the class II antigen associated glycoprotein p31 (also called Ii, In, M1, DRγ, XMl) is expressed not only in the membranes of B lymphocytes but also in those of muscle, liver and brain. It can therefore be assumed that the p31 is not really associated with the human class II antigens but is a ubiquitous molecule.Here we demonstrate for the first time that the muscle membranes of cattle and pig contain corresponding polypeptides, with a molecular weight of about 31 kDa and an isoelectric point around 7.5, which comigrate in two‐dimensional electrophoresis with p31 derived from the human muscle. Thus, in cattle and pig too, these proteins seem to be equivalent to the class II antigen associated p31, showing a tissue distribution wider than observed up to now. The molecules can be concentrated by ion‐exchange chromato

ISSN:0003-3480    

DOI:10.1111/j.1365-2052.1984.tb01115.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

SummaryThe plasma protease inhibitor system (Pi) of Standardbred horses was studied by thin‐layer, high‐voltage, acid polyacrylamide gel electrophoresis (pH 4.6) followed by protein staining and staining for trypsin and chymotrypsin inhibition. In addition to the eight Thoroughbred alleles (PiF, g, i, L, N, S1, S2, u), another 10 alleles, designatedPiH, j, k,o,p,q,r,v,x, z, were postulated to account for the 98 Pi types which were observed in Standardbreds. Detailed inhibitory spectra of the ‘new’ alleles were determined and further exceptions to the Pil, Pi2 classification of Juneja et al. (1979) were found. Limited family data demonstrated the genetic nature of the ‘new’ variants and confirmed the allelic inheritance of the ‘new

ISSN:0003-3480    

DOI:10.1111/j.1365-2052.1984.tb01116.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

SummaryBiochemical variation of four genetic markers (Hb, Al, Tf, ‘X’ protein) in the blood of four Spanish goat breeds was analysed with starch gel electrophoresis. The frequencies at all of these loci have been calculated for the Spanish goats and compared with some of the goat breeds studied so far by other auth

ISSN:0003-3480    

DOI:10.1111/j.1365-2052.1984.tb01117.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

SummaryA simple two‐stage technique for preserving bovine lymphocytes is described. Lymphocytes from animals chosen at random were used. The experiments indicate that the optimum temperature for freezing and the optimum concentration of dime‐thylsulphoxide (DMSO) as cryoprotectant were in the range ‐29 °C to ‐31 °C and 17.5 % to 20 % respectively. These concentrations of DMSO are much greater than those reported in most othe

ISSN:0003-3480    

DOI:10.1111/j.1365-2052.1984.tb01118.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

ISSN:0003-3480    

DOI:10.1111/j.1365-2052.1984.tb01119.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

ISSN:0003-3480    

DOI:10.1111/j.1365-2052.1984.tb01120.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

ISSN:0003-3480    

DOI:10.1111/j.1365-2052.1984.tb01121.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

Correspondence with Editor regarding glucosephosphate isomerase polymorphism in sheep

ISSN:0003-3480    

DOI:10.1111/j.1365-2052.1984.tb01122.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY