Vol. 4 (5) : September-October 2013 issue
Green Farming Vol. 4 (5) : 640-642 (September-October, 2013)
Genetic divergence for resistance to shootfly Atherigona soccata Rond. in kharif sorghum, [Sorghum bicolor (L.) Moench]
S.P. MEHTREa1 , R.J. RAVTEa2 and S.L. SAWARGAONKARb3*
aDeptt. of Agril. Botany, Genetics & Pl. Breeding, College of Agric., Marath. Agricu. University, Parbhani - 431 401 (M.S.)
bInternational Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru - 502 324 (Andhra Pradesh))
Designation : 1P.G. Student, 2Assoc. Professor, 3Res. Assoc. *(shrikant_sawargaonkar@gmail.com)
Subject : Crop Genetics and Plant Breeding
Paper No. : P-0169
Total Pages : 3
Received : 09 February 2012
Revised accepted : 12 September 2013
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Citation :
S.P. MEHTRE, R.J. RAVTE and S.L. SAWARGAONKAR. 2013. Genetic divergence for resistance to shootfly Atherigona soccata Rond. in kharif sorghum, [Sorghum bicolor (L.) Moench]. Green Farming Vol. 4 (5) : 640-642 ; September-October, 2013
ABSTRACT
Inclusion of diverse parents in hybridization increased the chances of obtaining high heterosis in hybrids and a broad spectrum of variability in segregating generations. The present study was planned and conducted to know the genetic diversity and nature of clustering pattern in 101 shootfly resistant sorghum (Sorghum bicolor) advanced breeding lines having resistance to shootfly (Atherigona soccata Rond). The genetic diversity for shootfly resistance was assessed using D2 statistics. The analysis of variance revealed significant differences among the genotypes for all the traits studied. The 101 genotypes were grouped into ten clusters where clusterII has maximum (35) number of genotypes followed by cluster I (33), and cluster X (17). Among the seven characters studied number of trichomes (10X microscopic field) contributed the most (34.83%) to the genetic divergence of the genotypes, followed by dead heart damage (%) 28 DAE (28.63%) and seedling vigour (%) 14-16 DAE. However oviposition (%) indicated a narrow range of diversity among the genotypes under study.
Key words :
Atherigona soccata Rond, Genetic diversity, Resistance, Shootfly, Sorghum bicolor.
