Vol. 12, Issue 12 (2023)

Author(s):
Patel AM, Patel DK, Patel JR, Patel NB, Patel PC and Patel YN

Abstract:
Castor is a sexually polymorphic plant with two distinct sex forms: monoecious, which has staminate or male flowers at the base of the inflorescence and pistillate or female flowers at the top. Interspersed staminate flower (ISF) with sporadic male flowers and revertant and pistillate spike with all female flowers and no male flowers. Ankinnedu and Rao (1973) discovered that a monthly mean day temperature of 32 to 33⁰C was ideal for inducing ISF and maintaining the pistillate line in castor. As the fraction of pistillate plants increased with higher nitrogen levels, the number of ISF plants fell. Three systems of femaleness—N, S, and NES—have been identified by a comprehensive examination of the genetic and non-genetic mechanisms determining sexual polymorphism in castor (Classen & Hoffman, 1950). Temperature, photoperiods, soil fertility, plant age and nutrients are among the environmental elements that have a significant impact on castor plant sex expression (1960, Shifriss). However, the relationship between genotype and environment has received relatively little study attention and stability analysis for variables related to sex is completely absent.