Studies on introgression for fibre traits in cotton
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Date
2006
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UAS, Dharwad
Abstract
An investigation was carried out at Agricultural Research Station, Dharwad Farm
during kharif 2005-06 to study genetic introgression for fibre traits in a cross between G.
herbaceum var. DDhc-11 (cultivated diploid variety) and G. anomalum to improve fibre
properties in desi cotton in the present study four populations viz., BC1F3, BC2F2, BC3F1 and
F4 were studied.
Distinguishable morphological characters such as leaf colour, leaf hairiness, stem
colour, stem hairiness, anther colour, filament colour and bract shape were studied for all four
populations. Based on recombination for morphological traits several crosses of
recombination viz., 31 in BC1F3, 32 in BC2F2, 19 in BC3F1 and 12 in F4 were studied. All
plants of four populations were studied for halo length and detailed yield contributing
characters. Based on sufficient lint availability some of the plants were studied for fibre
properties in detail.
In all the four populations desirable plants for seed cotton yield (100-298 g/plant),
GOT (36-39.6%), boll weight (2.45 to 3.0 g), boll number (55-183), 2.5% span length (25-27
mm), fibre strength (21-24.78 g/tex), micronaire (3.3 – 5.1), suitable count (20-40) were
studied as against 89 g/plant (SCY), 32 per cent (GOT), 2.0 (boll weight), 49.87 (boll
number), 23.11 (fiber length), 19.16 (fibre strength), 5.09 (micronaire) and 20 (count) of
DDhc-11.
The similarity to the extent >0.75 between DDhc-11 and highly desirable plants
interms of seed cotton yield and high fibre strength plants number 3-6 [(120 g/plant), (19.9
g/tex)], 18.2 [(218 g/plant), (20.8 g/tex)], 2-9 [(188 g/plant), (20.2 g/tex)] and 1-2 [(87
g/plant), (21 g/tex) were identified.
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Keywords
Genetics and Plant Breeding