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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2020)
[Effective from January 1, 2020]
For more details click here

ICV 2018: 95.39
Index Copernicus ICI Journals Master List 2018 - IJCMAS--ICV 2018: 95.39
For more details click here

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Original Research Articles

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2018.7(2): 3533-3542
DOI: https://doi.org/10.20546/ijcmas.2018.702.419


Gene Action and Heterosis Studies for Growth, Earliness, Yield and Downy Mildew Disease [Pseudoperonospora cubensis (Berk. and Curt.) Rostow.] in Ridge Gourd [Luffa acutangula (Roxb.) L.]
Anand Narasannavar1*, V. Devappa2, B. Fakrudin3, M. Pitchaimuthu4 and S. Sriram5
1Department of Vegetable Science
2Department of Plant Pathology
3Department of Biotechnology and Crop Improvement, College of Horticulture, UHS Campus, Bengaluru, Karnataka, India
4Division of Vegetable Science, 5Division of Plant Pathology, IIHR, Hessaraghatta, Bengaluru, Karnataka, India
*Corresponding author
Abstract:

Thirty five F1,s with their twelve parents in ridge gourd [Luffa acutangula (Roxb.) L.] were tested for combing ability and heterosis for growth, earliness, yield and downy mildew disease. The variance due to Specific Combining Ability (SCA) is higher than the General Combining Ability (GCA) for all the characters, suggested that non-additive gene action had greater role in the inheritance of all the characters. Out of 13 parents, COHB-1, COHB-3, COHB-5, Pusa Nutan and Deepthi were adjusted as good general combiners for most of the traits. Regarding to sca effects, COHB-6 × Deepthi for vine length, COHB-4 × Arka Sujat for days to first pistillate flowering, COHB-6 × Pusa Nasdar for days to first harvesting, COHB-1 × Deepthi for fruit yield per vine, COHB-2 × Pusa Nutan for downy mildew per cent disease index exhibited highest sca effects in desirable direction. The extent of heterosis over the three best crosses for fruit yield per vine (155.73 to 185.29 % over better parent and 5.09 to 25.95 % over commercial check) revealed that there is a great scope of realising higher yield in ridge gourd through heterosis breeding. The cross combination COHB-1 × Deepthi registered the highest economic heterosis (25.95 %) for total fruit yield per vine including earliness and downy mildew per cent disease index.


Keywords: Ridge gourd, Heterosis, Combining ability, Earliness and downy mildew disease
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How to cite this article:

Anand Narasannavar, V. Devappa, B. Fakrudin, M. Pitchaimuthu and Sriram, S. 2018. Gene Action and Heterosis Studies for Growth, Earliness, Yield and Downy Mildew Disease [Pseudoperonospora cubensis (Berk. and Curt.) Rostow.] in Ridge Gourd [Luffa acutangula (Roxb.) L.].Int.J.Curr.Microbiol.App.Sci. 7(2): 3533-3542. doi: https://doi.org/10.20546/ijcmas.2018.702.419