Working group session:
Germplasm and Genetic Stocks
Presentation type:
poster
Authors:
Bishnoi, Kiran; Salar, Raj Kumar; Verma, Surender Kumar
Presenter:
Bishnoi, Kiran
Correspondent:
Salar, Raj Kumar; Verma, Surender Kumar
Abstract:
Genetic diversity is desirable for long term crop improvement and reduction of vulnerability to important crop stresses. Many successful cotton cultivars have been developed from closely related parents but limited yield gains in recent years have led some to advocate more extensive use of exotic germplasm (Meredith 1991).Gossypium arboreum possesses many favourable traits for cotton production which the tetraploid cultivars lack. For example drought tolerance, resistance to disease, make G. arboreum well adapted to dry land conditions and low input cultivation practices. Some of the accessions produce fibres with high strength and seeds with high oil content and seed index. The G. arboreum germplasm collection is an invaluable genetic resource for tetraploid improvement; however it has not been well characterised at the molecular level.Microsatellite markers showed considerable genetic variation among the seventeen genotypes of cotton Gossypium arboreum species.The similarity coefficient ranged between 0.78 to 1.00.The maximum numbers of polymorphic bands were obtained from marker MGHES-13 and JESPR-65. Understanding the genetic relationships within G. arboreum would facilitate efficient use of resource for developing superior cotton cultivars with favourable agronomic traits.