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Cotton Genomics and Genetics
2013, Vol.4, No.6, 73-92 http://cgg.sophiapublisher.com
Research Report
Open Access
Heterosis Studies and
Per se
Performance of Intra Hirsutum Hybrids
(
G.hirsutum
x
G.hirsutum
) for Kapas Yield and Its Components in Cotton
Yanal Alkuddsi
1
, M.R. Gururaja Rao
2
, S.S. Patil
1
, Mukund Joshi
3
, T.H.Gowda
4
,
1 Department of Genetics and Plant Breeding ,University of Agricultural Sciences, Dharwad, Karnataka, India
2 Department of Genetics and Plant Breeding, University of Agricultural Sciences, Bangalore, Karnataka, India
3 Department of Agronomy, University of Agricultural Sciences, Bangalore, Karnataka, India
4 Head of Agricultural Research Station, Bavikere, Therikere, Karnataka, India
Corresponding author email: y.alkuddsi@hotmail.com;
Authors
Cotton Genomics and Genetic, 2013, Vol.4, No.6 doi: 10.5376/cgg.2013.04.0006
Copyright
© 2013 Yanal Alkuddsi et al. This is an open access article published under the terms of the Creative Commons Attribution License, which permits
unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Fourty eight intra hirsutum hybrids from Line x Tester design along with three checks ((BUNNY
Bt
, RCH2
Bt
, RAHH 95)
(one repeated two times) was laid out in Randomized Complete Block Design (RCBD) with two replications. Each entry was sown
in 3 row plots of 6 m length spaced at 90 cm with recommended dose of fertilizer and treatment of seeds with imidochloprid were
sown on 10-7-2008 at the Agricultural Research Station, Bavikere, UAS, Bangalore. The analysis of variance among 48 hybrids and
checks tested in 2 replications indicated that mean sum of squares for hybrids was highly significant for all the characters except
number of monopodia per plant, mean boll weight and seed index indicating presence of significant differences among the hybrids
evaluated in respect of these traits. The mean sum of squares for hybrids vs checks was highly significant for plant height number of
sympodia per plant, number of bolls per plant, kapas yield per plant and ginning outturn revealing superiority of hybrids over checks
and presence of heterosis in respect of these traits. The performance of three top hybrids viz., RAH 97 x SC 18, RAH 146 x RGR 37
and RAH 146 x RGR 58 in respect of kapas yield per plant needs to be verified for their performance on large scale basis. Two
hybrids RAH 97 x SC 18 and RAH 146 x RGR 37 were superior over standard commercial check RAHH 95 for kapas yield per plant,
number of sympodia per plant, number of monopodia per plant, number of bolls per plant and ginning outturn and the hybrid RAH
146 x RGR 58 exceeded best
Bt
check hybrid (RCH2
Bt
) for kapas yield per plant.
Keywords
Heterosis;
Per se
performance; Intra hirsutum
Introduction
Cotton is an important fiber yielding crop of global
importance, which is grown in tropical and subtropical
regions of more than 80 countries the world over. It
provides livelihood to about sixty million people and
is an important agricultural commodity providing
remunerative income to million of farmers both in
developed and developing countries. In India, inspite
of severe competition from synthetic fibers in recent
years, it is occupying the premiere position with 70
per cent share in the textile industry.
Gossypium hirsutum
L. provides 90% of world fiber
and is major cash and industrial crop. Cotton is grown
on almost 32.4 million hectares in more than 90
countries of temperate, sub-tropical, and tropical
regions of the world. The four main producing
countries are China, India, USA and Pakistan and
accounted for approximately three quarters of world
output. If Uzbekistan and Brazil are added, six
countries would account for 83% of world cotton
production. Cotton is long day and often
cross-pollinated crop, and usually requires little heavy
soil, moderate rainfall and mostly sunshine. Intra-
hirsutum hybrids have been released for commercial
cultivation in all nine major cotton growing states.
These hybrids cover maximum area, among cotton
hybrids, under cultivation and can be grown both
under irrigated and rainfed conditions. Intra- hirsutum
hybrids are more tolerant to sucking pests than inter
specific hybrids between
G. hirsutum
and
G.
barbadense
.
Preferred citation for this article:
Yanal Alkuddsi et al., 2013, Heterosis Studies and
Per se
Performance of Intra Hirsutum Hybrids (
G.hirsutum
x
G.hirsutum
) for Kapas Yield and Its
Components in Cotton, Cotton Genomics and Genetics, Vol.4, No.6 73-92 (doi: 10.5376/cgg.2013.04.0006)
Received: 13 Sep., 2013
|
Accepted: 23 Jul., 2013
|
Published: 25 Nov., 2013
Cotton Genomics and Genetics