摘要:

SummaryAgglutinins that reacted with red cells from members of a different species (hetero‐agglutinins) were detected in the serum of bovine fetuses beginning with about 5% in the fifth month of gestation, with the frequency of reactive sera increasing to about 50 % near term. The sera were able to agglutinate red cells from an increasing number of species as fetal age increased, but only exceptionally equalled the number agglutinated by sera from the dams.Antibodies that reacted with bovine red cells (isoantibodies) were detected in bovine fetal sera (anti‐L agglutinin, anti‐K hemolysin). However, no fetal serum was found that agglutinated the red cells of the respective dam.All fetal isoantibodies were inactivated by heat (56°C/30 min) and 2‐mercapto‐ethanol (2‐ME) treatment, whereas some heteroagglutinins in serum from one fetus were resistant to inactivation by these methods. This suggests that most of the fetal antibodies were ot

ISSN:0003-3480    

DOI:10.1111/j.1365-2052.1972.tb01228.x

出版商:Blackwell Publishing Ltd    

年代:1972

数据来源: WILEY

摘要:

SummaryWhite crappie,Pomoxis annularis, and black crappie,P. nigromaculatus, were hybridized to produce Fi and F2 generations. There was considerable tissue specific esterase gene function within each parental species. Many of the esterases were homologous but possessed different electrophoretic mobilities between the two species which permitted their use as gene markers. The pattern of inheritance and expression of a number of esterase genes was determined in the Fi and F2 interspecific hybrids.Although certain key morphological phenotypes characteristic of the black crappie predominate in the Fi hybrid, the enzyme phenotypes reflect the contributions of both co‐dominant parental genomes. There is a higher percentage of heterozygotes than expected in the F2 generation which may be indicative of heterosis. The genetic analysis also provided a better understanding of the polypeptide composition of these esterase

ISSN:0003-3480    

DOI:10.1111/j.1365-2052.1972.tb01229.x

出版商:Blackwell Publishing Ltd    

年代:1972

数据来源: WILEY

摘要:

SummaryA colorimetric method was used to study the variations in the haemolytic rates between red cells from different individuals and with different blood factors. Marked differences were observed between the heterozygous and homozygous genotypes of 18 out of 20 different blood factors and between the B1or E3factors, when they occurred in heterozygous genotypes but in different phenogroups. Between MZ twin pairs a continuous variation was found in the haemolytic rates for 17 out of 18 different blood factors, which indicated a quantitative genetic variation depending on individuality, in addition to the dosage‐ and pheotype‐dependent variation.The similar rankings of the haemolytic rates of the blood factors of the B1O3Y2A'E3phenotype in red cells from 11 MZ twin pairs suggested their simultaneous regulation. When the haemolytic rates of different blood factors at four or more loci were compared for 15 MZ twin pairs, the ranking results of a given locus were independent of those of the other loci in all pairs, except

ISSN:0003-3480    

DOI:10.1111/j.1365-2052.1972.tb01230.x

出版商:Blackwell Publishing Ltd    

年代:1972

数据来源: WILEY

摘要:

SummaryAnother factor, the twelfth in number, has been detected in the E blood group system of pigs. It has been named Em and constitutes with factor El a genetically closed subsystem. A new alleleEedgklhas been found in the Black and White‐Přeštice br

ISSN:0003-3480    

DOI:10.1111/j.1365-2052.1972.tb01231.x

出版商:Blackwell Publishing Ltd    

年代:1972

数据来源: WILEY

ISSN:0003-3480    

DOI:10.1111/j.1365-2052.1972.tb01232.x

出版商:Blackwell Publishing Ltd    

年代:1972

数据来源: WILEY

ISSN:0003-3480    

DOI:10.1111/j.1365-2052.1972.tb01233.x

出版商:Blackwell Publishing Ltd    

年代:1972

数据来源: WILEY