GENETICS OF SEX IN THE HEMP (CANNABIS SATIVA L.)

Abstract

Sex inheritance and phenogenetics in the hemp have been studied experimentally. Cases of sex reversion induced by mechanical injury or by abnormal photoperiod have been observed. Female plants are homogametic, as well as monoecious plants having female habitus. Monoecity is recessive with respect to female sex. Males are heterozyous with respect to an epistatic factor. High mortality of seedlings before their emergence and after the emergence was observed to decrease and to increase the sex ratio respectively. The senescence of the pollen resulted in a considerable decrease of viability in general, and in particular, of the proportion of male specimens.