Dudhe M.Y.,ICAR Indian Institute of Oilseeds Research IIOR |
Rajguru A.B.,Zonal Agriculture Research Station ZARS |
Bhoite K.D.,Agricultural Research Station ARS |
Madhuri P.,ICAR Indian Institute of Oilseeds Research IIOR
Sabrao Journal of Breeding and Genetics | Year: 2017
The trial comprising of 32 sunflower germplasm accessions including three checks were evaluated at three semi-arid dryland locations of Telangana and Maharashtra states. In Telangana the location was Indian Institute of Oilseeds Research (IIOR), Hyderabad, and two locations at Maharashtra i.e. Zonal Agriculture Research Station (ZARS), Solapur and Agricultural Research Station (ARS), Savalvihir, MPKV, Rahuri. The objective of the study is to study the genetic variation among the germplasm and to identify the better performing accessions across the locations. The environment at IIOR, Hyderabad can be considered to be the most stable environment for seed yield and ZARS Solapur can be considered to be the most stable environment for maturity days because closer to the center of the site regression biplot. Based on site regression (SREG) model analysis and per se performance genotype GP2-1217 for seed yield and maturity is an ideal genotype across environments. The magnitude of phenotypic coefficient of variation (PCV) values for all the traits were higher than the corresponding genotypic coefficient of variation (GCV) values indicating that all seven traits are under the influence of environmental effect. High heritability associated with high genetic advance as percent of mean were recorded for plant height, indicating less environmental influence on plant height and role of additive gene action.Two major clusters were identified based on heat map diversity approach. The high yielding and medium duration check genotypes DRSF-113 grouped under Ist cluster whereas check Morden which is dwarf and early duration genotype grouped under IInd cluster. The yield traits like 50% flowering and maturity days falls under one group and showed more or less similar type of pattern in the expression of traits. Based on diversity analysis genotypes identified into two major clusters that can be utilised for the development of high yielding and medium duration diverse gene pool in sunflower. © Society for the Advancement of Breeding Research in Asia and Oceania (SABRAO) 2017.