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Heterosis studies in sunflower (Helianthus annuus L.)

The present investigation entitled “Heterosis studies in sunflower (Helianthus annuus L.) was undertaken to estimate the heterosis for seed yield and its components in sunflower. | Int.J.Curr.Microbiol.App.Sci 2019 8 9 2155-2161 EXCELLENT PUBLISHERS International Journal of Current Microbiology and Applied Sciences ISSN 2319-7706 Volume 8 Number 09 2019 Journal homepage http www.ijcmas.com Original Research Article https doi.org 10.20546 ijcmas.2019.809.249 Heterosis Studies in Sunflower Helianthus annuus L. D. Ramaraju A. B. Rajguru H. J. Rajput and R. D. Nimbalkar Division of Botany College of Agriculture Pune Maharashtra India Corresponding author ABSTRACT Keywords Sunflower Heterosis Helianthus annuus Article Info Accepted 20 August 2019 Available Online 10 September 2019 The present investigation entitled Heterosis studies in sunflower Helianthus annuus L. was undertaken to estimate the heterosis for seed yield and its components in sunflower. The four CMS lines and eight restorer lines were crossed in line x tester model to produce 32 hybrids during Summer- 2017-18 and these 32 hybrids along with two checks were evaluated for days to 50 percent flowering day to maturity plant height cm head diameter cm seed filling percentage 100 seed weight g volume weight g 100ml hull content seed yield per plant g and oil content . The magnitude of heterosis over the check Phule Raviraj and MDSFH-411 for most of the characters in the present study were highly appreciable. Among the hybrid viz. CMS-89 x NSH-312 showed the highest significant heterosis for seed yield and its components over the checks Phule Raviraj and MDSFH-411. From the investigation the following hybrids were found promising i.e. CMS-343 x PSMoO-108 CMS-89-1 x NSH-312 CMS-62 x AKSF-12 and CMS-343 x MRHA-2 which showed high per se performance comprising significant standard heterosis for seed yield along with significant heterosis in desirable direction for most of the yield attributes. Introduction The sunflower Helianthus annuus L. is important oil seed crop. The genus Helianthus is grown as a crop for its edible oil and edible fruits. Under this genus there are 67 species .