Studies on physiological efficiency of bt cotton hybrids and their non bt counterparts
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Date
2010-05-20
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Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani
Abstract
A field experiment entitled "Studies on physiological efficiency of
Bt cotton (Gossypium hirsutum) hybrids and their non-Bt counterparts" was
conducted at the farm of Cotton Research Scheme, Marathwada
Agricultural University, Parbhani during kharif season, 2009-10.
The experiment was sown in simple randomized block design with
three replications and six Bt cotton hybrids along with their non-Bt
counterparts. Observations on plant height, leaf area, leaf chlorophyll
content, relative leaf water content, specific leaf weight, seed cotton yield
and its components and length of root and shoot etc were recorded.
The hybrid Ajeet 155 Bt out yielded other hybrids owing to
moderate leaf area and highest number of bolls per plant, bigger boll size
and high harvest index and biological yield was also high.
The characters leaf area, number of bolls per plant, biological yield
and harvest index showed highly significant positive correlation with seed
cotton yield per plant.
As a consequence of Bt gene, there was reduction in plant height and
increase in leaf area and tqtal dry matter produced per plant. Average of
partly red leaves was more in Bt hybrids compared to their non-Bt counterparts.