We assessed genetic factors on progeny dispersal due to sire color morph genotypes in a field pedigree and lab crosses, and we measured maternal effects by studying both natural and experimentally induced egg size variation. Progeny were released into nature upon hatching, but we recorded dispersal distance at maturity, which reflects effective dispersal after viability selection has run its co...

N a previous paper of this series (BRILES, ALLEN and MILLEN 1957) data were 'presented showing that the B blood group system of chickens constituted a case of genetic polymorphism. Of 73 closed populations tested, 71 had two or more alleles. Moreover a detailed serological study disclosed the existence of 21 alleles in 12 lines derived from nine different original stocks. GILMOUR (1959) studied...

Glutathione(GSH) is an antioxidant that being studied for its ability to improvecellular responses semen preservation challenges. The research goal aimed toevaluate the impact of introducing different glutathioneconcentrations boar freezing extender (0, 1, 5, and 10 mM) onthe Kolbroek sperm's quality after frozen thawed. For 2 h, thecollected sperm-rich fraction was chilled at 17°C. Following 1...

Low-density lipoprotein (LDL) extracted from hen egg yolk has recently been considered to be superior to whole egg yolk in sperm cryopreservation of various animal species. Meanwhile, there was a notion that high-density lipoprotein (HDL) in egg yolk may have a negative effect on post-thaw survival. The role of LDL and HDL in sperm cryopreservation of rhesus monkeys has not been explored. The p...

Background: Low density lipoprotein (LDL) of egg yolk has been successfully used for stallion and bull semen cryopreservation. However, there is limited information to clarify the effect of LDL or lyophilized LDL on ram semen quality. On the other hand, during semen collection, dilution and cryopreservation we need to protect the spermatozoa from lipid peroxidation. Clove bud has polyphenolic c...

the aim of the present study was to investigate the effect of in vitro supplementation of selenium on fresh and frozen spermatozoa quality of buffalo (bubalus bubalis) bulls. five healthy buffalo bulls (5 ejaculates from each bull) were used. each ejaculate was diluted at 37 ˚c with tris-based extender containing 0 (control), 0.5, 1, 2, 4 and 8 μg ml-1 sodium selenite and the sperm motility and...