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Molecular marker
technology in cotton
Preetha, S* and Raveendren T. S
Centre for Plant Breeding and Genetics (CPBG),
Tamilnadu Agricultural University, Coimbatore-641001,
Tamilnadu, India.
*Corresponding author
E-mail:preethii1@rediffmail.com.
Accepted
18 April, 2008 |
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Molecular markers have been a valuable tool in cotton
breeding investigations. Various marker techniques used in
cotton include Restriction Fragment Length Polymorphism (RFLP),
Random Amplified Polymorphic DNA (RAPD), Amplified Fragment
Length Polymorphism (AFLP), Simple Sequence Repeats (SSR),
Inter Simple Sequence Repeats (ISSR) and Sequence Related
Amplified Polymorphism (SRAP).They have large number
applications like characterization of gene pool, DNA
fingerprinting, phylogenetic analysis, molecular dissection
of complex traits, and characterization of genome
organization . Several challenges have been overcome in
cotton genomic research and now genetic linkage maps of
cotton have been developed based on both intraspecific (intrahirsutum)
and interspecific (Gossypium hirsutum x Gossypium
barbadense) population and the QTLs responsible for leaf
shapes, plant trichomes, photopheriodism, stomatal
conductance, disease resistance, yield and fibre quality
traits have been mapped. This article would give an overview
of genomic research on cotton.
Key
words:
Cotton, DNA markers, diversity studies, QTL mapping. |
