CYTOLOGICAL STUDIES OF VENTURIA INAEQUALIS

摘要

A cytological study ofVenturia inaequalishas revealed that only one meiosis occurs in the ascus, and that the haploid number of chromosomes is seven. Most asci originate through typical hooks, but in a number of perithecia these croziers are absent, and large budding cells give rise to small ascus-shaped structures. Variations in nuclear stainability were observed among perithecia at the same stage of maturity. Attempts were made to characterize the seven chromosomes.