Mitochondrial inheritance in haploid × non-haploid crosses in Cryptococcus neoformans

Mechanisms of Uniparental Mitochondrial DNA Inheritance in Cryptococcus neoformans

In contrast to the nuclear genome, the mitochondrial genome does not follow Mendelian laws of inheritance. The nuclear genome of meiotic progeny comes from the recombination of both parental genomes, whereas the meiotic progeny could inherit mitochondria from one, the other, or both parents. In fact, one fascinating phenomenon is that mitochondrial DNA in the majority of eukaryotes is inherited...

SXI1α controls uniparental mitochondrial inheritance in Cryptococcus neoformans

In the great majority of sexual eukaryotes, mitochondria are inherited almost exclusively from a single parent [1,2]. However, the mechanisms for uniparental mitochondrial inheritance remain largely unknown. Here, we identify a gene that controls mitochondrial inheritance in the fungus Cryptococcus neoformans. Strains of the basidiomycete yeast C. neoformans are predominantly haploid and exist ...

Haploid Cultures

Prezygotic and Postzygotic Control of Uniparental Mitochondrial DNA Inheritance in Cryptococcus neoformans

UNLABELLED Uniparental inheritance of mitochondrial DNA is pervasive in nonisogamic higher eukaryotes during sexual reproduction, and postzygotic and/or prezygotic factors are shown to be important in ensuring such an inheritance pattern. Although the fungus Cryptococcus neoformans undergoes sexual production with isogamic partners of opposite mating types a and α, most progeny derived from suc...

Development of yellow rust resistant doubled haploid lines of wheat through wheat ´ maize Crosses

In order to produce doubled haploid lines of bread wheat resistant to strip or yellow rust, three F1 wheat hybrids were crossed using pollens of three maize hybrids. Out of 1071 pollinated florets, success in seed set ranged from 63.1% to 93.3% (mean 78%). Differences in seed set among the crosses were not significant. Embryo formation in the seeds developed on different crosses also varied fro...