Abstract

From a crop survey of the Peninsular Indian arboreum cottons in the Cocanadas (race indicum) zone, Balasubra- manyan, Ramaswamy and Jagannatha Rao (1946) reported on the occurrence of three new genotypes not recorded earlier in this region. They were (a) Green stem/Ghost Spot-Ros Ros; (b) Fully immature lint Im and. (c) Incomplete boll dehiscence - dep and the inheritance of these characters in a few combinations of crosses has since been reported by Balasubramanyan et al (1950). The Green stem/Ghost Spot type was characterised by the complete absence of anthocyanin pigment in all plant parts and by the presence of a white patch in the place usually occupied by the red spot in the petal. The corolla colour of the new type was yellow and hence the white patch designated as 'Ghost' (Hutchinson, 1932) was easily visible. The inheritance of this Green stem/Ghost spot complex in relation to different anthocyanin and corolla colour factors, in five inter-racial crosses in G. arboreum involving Sun-red and Deep-red; Yellow corolla, Pale-yellow and White corolla genotypes is reported in this paper.

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