3. Results and discussion
3.1. Cotton transformation and regeneration
A total of 2346 hypocotyl explants were co-cultivated with
Agrobacterium culture in 4 independent experiments and 475
transformed explants were further selected by using kanamycin
100 mg/l. The callus formation was observed after 20 days culture
on callus induction medium. The embryogenic callus was
observed after 3–4 subculture and embryo formation were
observed just after five sub-cultures. The developed embryos
were germinated elongated in the elongation medium. After
two weeks proper root formation took place upon culture in
the rooting medium. Total, nineteen PCR positive cotton
plants were regenerated from transformed tissue and hardened
into big pots (Fig. 2, Table 1).
3.2. Molecular confirmation of transformants
The developed plants were shifted to bigger pots and maintained
under greenhouse. The presence of bC1gene was confirmed
by PCR amplification of developed plants (Fig. 3).