Indian Society of Genetics & Plant Breeding

Cytomorphological studies in hybrid between haploid of Gossypium hirsutum (L~) and diploid Gossypium arboreum (L.)

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A hybrid between G. hirsutum haploid (2n = 2x = 26;
AhDh) and G. arboreum L. Var. G 27 (2n = 2x = 26; A1A1)
was obtained. Its hybridity was confirmed on morphological
and cytological basis. This hybrid is considered as a
successful breakthrough in gene transfer between G.
hirsutum x G. arboreum which was earlier considered as
difficult and unsuccessful due to incompatibility caused
by the disintegration of endosperm and failure of embryo
development as well as disharmony between zygote and
surrounding tissue (endosperm zygote imbalance).
Restoration of such balance in haploid might make it
possible for hybrid embryo to develop into normal healthy
seed and adult plant. Further, utilization of this hybrid
for introgression of resistance to sucking pests, drought
as well as wider adaptability from G. arboreum to G.
hirsutum is discussed.

Keywords: Gossypium hirsutum, G. arboreum, haploid, cytomorphology, biotic and abiotic stresses


Year: 2003
Volume: 63
Issue: 2
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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