Studies on the combining ability of dwarf restorer lines in sunflower (Helianthus annuus L.)
2012
Gejli, K., Main Agricultural Research Station, Raichur (India). Department of Genetics and Plant Breeding | Goud Shanker, I., Main Agricultural Research Station, Raichur (India). Department of Genetics and Plant Breeding | Boraiah, K.M., Main Agricultural Research Station, Raichur (India). Department of Genetics and Plant Breeding
The present investigation was undertaken to assess the combining ability for dwarfness among the given testers and also to estimate the extent of heterosis for ten different characters in 90 hybrids which were derived by crossing ten diverse cms lines with nine dwarf testers in a line × tester mating design during rabi 2008-09. The resultant hybrids and parents along with standard check RSFH-130 were evaluated for plant height and other yield contributing traits. CMS-107A among lines and R-411R among testers were found to be best general combiners for dwarfness and other yield contributing traits. The best cross combinations for seed yield per plant CMS-104A × RHA-288 and oil content CMS-131A × R-186-1 with high sca effect have been identified. The cross CMS-105A × R-186-1 recorded a significant heterosis over better parent (- 10.65%) for plant height and seed yield and the cross CMS-X × R-4-2-Br recorded a significant heterosis over standard check (-37.30%) for plant height.
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