Six experiments were conducted to determine the ability of exogenous estradiol-17/3 to increase numbers of sperm in the oviducts, uteri and cervices of inseminated estrous ewes. In a 2 x 3 factorial experiment, ewes were mated during either early or late estrus; ewes in each group were either not treated or were treated with estradiol by subcutaneous injection once, at 6 hr after mating (30 /ag...

We evaluated the mating ability of male western corn rootworms, Diabrotica virgifera virgifera Leconte (Coleoptera: Chrysomelidae), for 20 d after initial mating, using a series of laboratory experiments. Males mated an average of 2.24 times within 10 d after their first mating and averaged 0.15 matings between days 11 and 20 after their first mating. Because estimating the mating frequency in ...

a determination of the genetic variation of the fungus isolated from graminous weeds which is highly beneficial to know probable genetic recombination in the fungus populations was done for the first time in iran through pcr reaction. the isolates of fungus “magnaporthe grisea” from graminous weed hosts and from rice were analyzed through rapd-pcr to assay the mating type and genetic diversity....

the incidence of virulence factors among 114 enterococcus faecalis and 35 enterococcus faecium strains from different clinical specimens were compared with those isolated from control groups. a few of the isolates expressed two or more of the following traits simultaneously: hemolysin, aggregation substance, gelatinase, dnase, hemagglutinin and antibiotic resistance. the frequencies of hemolysi...

This paper provides a general method to derive algebraic expressions of genotype frequencies for multiple loci under various mating systems, including random mating, back-crossing, selfing, and full-sib mating. For each mating system, general equations are presented. In the case of three loci, comprehensive tables provide recurrence equations for genotype frequencies under random or self mating...