Cryptococcus neoformansMating and Genetic Crosses

Genetic and non-Genetic variations of body weight in iranian native fowl and their crosses with exotic breeds

Irregular genetic transmission in Tetrahymena crosses.

LLEN (1960) reported briefly an aberration in the breeding behavior of a Astrain (C*) of variety 1 of Tetrahymena pyriformis. Her later studies (ALLEN 1963) established the genetic parameters of the aberration and lead to the conclusion that the total genome of the C* strain is systematically excluded at conjugation. Genomic exclusion does, however, involve a complete reorganization process and...

Genetic recombination in sexual crosses of phycomyces.

Sexual crosses between strains of Phycomyces blakesleeanus , involving three auxotrophic and one color marker and yielding a high proportion of zygospore germination, are described. Samples of 20-40 germ spores from 311 individual fertile germ sporangia originating from five two-factor and three three-factor crosses were characterized. The results show: (1) absence of any contribution of apogam...

Genetic Recombination in Crosses Between Streptomyces aureofaciens and Streptomyces rimosus.

Polsinelli, M. (University of Pavia, Pavia, Italy), and Maria Beretta. Genetic recombination in crosses between Streptomyces aureofaciens and Streptomyces rimosus. J. Bacteriol. 91:63-68. 1966.-Biochemical mutants were obtained from Streptomyces rimosus and S. aureofaciens by ultraviolet irradiation. Crosses were performed between auxotrophic strains of S. rimosus and S. aureofaciens with posit...

Restriction in genetic crosses between Escherichia coli and Shigella flexneri.

Shigella flexneri restricts Escherichia coli deoxyribonucleic acid (DNA) and can modify phage DNA so that it is restricted in E. coli.