摘要:

SummaryTests of over 2000 pigs, with the blood group reagents Ac, Ap and 0, and the reagents Ha, Hb, He, Hd, He and Hc/c, confirmed that theHlocus affects the expression of A and 0 antigens. The ‘exceptional’ phenotypes Ap and — were found in Ha homozygotes of Miniature pigs and in Hcd homozygotes of a semi‐inbred Landrace line. They were also found in unrelated pigs of other breeds, and moreover in some individuals with genotypesHaHcd,HabHcd,H‐H‐andHaHaborHabHab.The mechanism of the effect of theHlocus on the A phenotypes may consist in the interaction of certain, not yet completely defined,Hgenotypes, or in linkage of the H system with the hypothetica

ISSN:0003-3480    

DOI:10.1111/j.1365-2052.1974.tb01307.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY

摘要:

SummaryIn Jersey cattle the plasma alkaline phosphatase (AP) activity was found to be markedly age‐dependent. Among animals grouped with regard to age a marked decrease in the average plasma AP activity was shown to take place until an age of 21/2to 3 years. For the J substance and β‐lactoglobulin phenotypes a dependency of age was not observed in the material studied.Excluding animals less than 3 years old and thus eliminating variation in AP activity due to age, a significant association (P<0.01) between AP activity and J phenotypes was observed among 91 animals. The Jcsphenotype was associated with low AP activity and the japhenotype with high AP activity. On the average the J substance phenotypes, Jcs, Jsand ja, exhibit an increasing plasma AP activity of 3.6, 4.2 and 6.8 King Armstrong Units, respectively, and a corresponding decrease in J substance.In a similar comparison of the β‐lactoglobulin phenotypes and plasma AP activity involving 82 lactating cows, an excess of the β‐lactoglobulin BB phenotypes with high AP activity just at P = 0.05 wa

ISSN:0003-3480    

DOI:10.1111/j.1365-2052.1974.tb01308.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY

摘要:

SummaryAt the instigation of the South Devon Cattle Breeders' Society of South Africa we studied the genetic relationships of South Devon cattle (South Africa) and Gelbvieh cattle (Germany) with eight other breeds including Red Angus and Black Angus (USA). On the basis of comparisons at ten immungenetic loci Gelbvieh and South Devon cattle are nearly as genetically similar as Red and Black Angus. The results indicate that Gelbvieh and South Devon had a common ancestry on the Continent and are distinct from other British breeds such as Hereford, Angus and Jersey. This study illustrates the application of studies of the genetic similarities of different breeds to the rational development of future breeding and preservation programs.

ISSN:0003-3480    

DOI:10.1111/j.1365-2052.1974.tb01309.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY

摘要:

SummaryAttempts were made to detect porcine thrombocyte antibodies by three techniques. No antibodies were detected by immunodiffusion; hetero‐antibodies were detected by both the fluorescent antibody and thrombo‐agglutination techniques; but iso‐antibodies were only detected by thrombo‐agglutination. With the latter, however, there were ill‐defined end‐points which made the interpretation of negative results difficult. It was therefore suitable only for positive reactions of str

ISSN:0003-3480    

DOI:10.1111/j.1365-2052.1974.tb01310.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY

摘要:

SummaryAttempts were made to detect antibodies to porcine thrombocytes by two indirect techniques. Only hetero‐antibodies were detected by complement fixation; iso‐antibodies were detected by the antiglobulin consumption technique. The latter gave consistent reliable results, the difference between positive and negative results being clear‐cut, but was found to be laborious.The problems of porcine thrombocyte serology are disc

ISSN:0003-3480    

DOI:10.1111/j.1365-2052.1974.tb01311.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY

摘要:

Summary1. A marked deficiency of the low activity carbonic anhydrase isoenzyme (CAI) has been found in chinchillas, resulting in a 90% reduction in CAI.2. The trace of CAI found in deficient animals exhibits a similar immunological reaction and electrophoretic migration to the usual CAI (+).

ISSN:0003-3480    

DOI:10.1111/j.1365-2052.1974.tb01312.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY

ISSN:0003-3480    

DOI:10.1111/j.1365-2052.1974.tb01313.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY

ISSN:0003-3480    

DOI:10.1111/j.1365-2052.1974.tb01314.x

出版商:Blackwell Publishing Ltd    

年代:1974

数据来源: WILEY