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Cotton Genomics and Genetics
2013, Vol.4, No.3, 33-44 http://cgg.sophiapublisher.com
Research Report
Open Access
Development of Heterotic Groups (
G. hirsutum vs G. barbadense)
Based on
Combining Ability and Inter specific Hybrids Performance for Yield and Fiber
Quality Traits
Yanal Alkuddsi , S.S. Patil , S.M. Manjula , B.C. Patil , H.L. Nadaf , B.S. Nandihali
Agricultural Research Station, Dharwad Farm, University of Agricultural Sciences, Dharwad, Karnataka, India, 580005
Corresponding author email: y.alkuddsi@hotmail.com;
Authors
Cotton Genomics and Genetics, 2013, Vol.4, No.3 doi: 10.5376/cgg.2013.04.0003
Copyright
© 2013 Yanal Alkuddsi. 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
Utilization of heterosis depends on genetic diversity existing between the parents, magnitude of dominance at the yield
influencing loci and the genetic distance between the chosen parental genotypes. It is possible to maximize heterosis by enhancing
genetic distance between two chosen parental populations. The main objective of the Line x Tester study was to determine the
combining ability status of the barbadense and hirsutum lines included in the heterotic box. These lines were compared with other
barbadense and hirsutum lines. For the pattern of combining ability and the potentiality of the interspecific hybrids developed based
on them. The efforts on creating recombinational variability have begun with two barbadense lines. However to compare the
potentiality of the 8 hybrids with other potential hybrids developed over years at Dharwad centre and best commercial hybrids (
Bt
and non
Bt
), a separate evaluation of these hybrids was taken up. Realizing the need for developing potential interspecific (
G.
hirsutum
×
G. barbadense
) hybrids, a detailed study was initiated at UAS Dharwad to identify hirsutum and barbadense genotypes
capable of giving potential interspecific hybrids. Based on this study done during earlier years in 2009-2010 two barbadense DB 533
and DB 534 and four hirsutum DH 98-27 (T
1
), ZCH 8 (T
2
), 178-24 (T
3
) and DH 18-31 (T
4
) lines giving best hybrids (H x B)
combinations between them were selected. Among four barbadense lines positive
gca
effects for seed cotton yield was recorded by
DB 533 and DB 534 confiriming the potential of these barbadense lines in developing productive interspecific hybrids. Among 23
hirsutum testers, four testers DH 18-31, ZCH 8, DH 98-27 and 178-24 exhibited good positive values of
gca
effects for seed cotton
yield and were located among top ten testers ranks 2, 8, 1 and 7 respectively when compared to other hirsutum testers. The potential
of 8 bench mark crosses of heterotic box ZCH 8 x DB 533, DH 98-27 x DB 534, DH 18-31 x DB 533, ZCH 8 x DB 534, 178-24 x
DB 533, DH 98-27 x DB 533, DH 18-31 x DB 534 and 178-24 x DB 534 recorded higher
per se
performance for seed cotton yield
ranking 1, 2, 4, 6, 8, 10, 11 and 14 out of 49 crosses. These crosses also recorded superior value for yield attributing characters like
number of bolls and mean boll weight. The mean performance of these crosses associated with this heterotic box was found to be
2174 kg/ha as compared to the overall mean of best HB interspecific hybrids which was 1921kg/ha.
Keywords
Heterotic groups; Interspecific hybrids; Combining ability;
G. hirsutum
,
G. barbadens
Introduction
Cotton, being the king of fibers in preparing human
apparel has played a key role in civilization of
mankind. Cotton is providing livelihood directly and
indirectly to over 60 million people and accounting
for about 16 per cent of India’s export earnings. India
was the first country to introduce commercial
cultivation of intra hirsutum hybrids in 1960s and then
interspecific hybrids in 1970s. The success of
interspecific hybrids has led to overcome the acute
shortage of ELS (Extra long stable) cotton which the
country was experiencing during 1970s and the
prominent hybrids from University of Agricultural
Sciences, Dharwad namely Varalakshmi and DCH 32
were instrumental in saving very critical foreign
exchange running to hundreds of crores of rupees.
Preferred citation for this article:
Yanal Alkuddsi et al., 2013, Development of Heterotic Groups (
G. hirsutum
vs
G. barbadense
) Based on Combining Ability and Inter specific Hybrids
Performance for Yield and Fiber Quality Traits, Cotton Genomics and Genetics,Vol.4, No.3 33-44 (doi: 10.5376/cgg.2013.04.0003)
Received: 29 Jun., 2013
|
Accepted: 11 Jul., 2013
|
Published: 13 Nov., 2013
Cotton Genomics and Genetics