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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 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2017: 100.00
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00
For more details click here

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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
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Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2017.6(11): 1240-1247
DOI: https://doi.org/10.20546/ijcmas.2017.611.147


Heterosis and Inbreeding Depression Studies for Yield and Yield Related Traits in Tomato (Solanum lycopersicum L.)
M. Sunil Kumar1*, A.K. Pal2, B. Rajasekhar Reddy3, Anil K. Singh2 and Anand K. Singh2
1(Horticulture), PJTSAU, Hyderabad, Telangana, India
2Institute of Agricultural Sciences, BHU, Varanasi, India
3Indian Institute of Vegetable Research, Varanasi, India
*Corresponding author
Abstract:

Standard heterosis over two checks was studied in 30 crosses of tomato. Degree and direction of heterosis is important for commercially exploitation of tomato. All these crosses showed marked variations for yield and yield related traits in the expression of standard heterosis. Standard heterosis for total yield per plant was found to be 62.46 per cent over first check (SH1) and 30.84 per cent over second check (SH2). Highest heterotic effects for yield traits over SH1 was observed for number of seeds per fruit followed by plant height, number of fruits per cluster, number of fruits per plant and fruit diameter while the traits showing highest heterotic effects over SH2 were fruit diameter followed by plant height, number of seeds per fruit, number of fruits per plant and number of primary branches per plant. The maximum significant positive heterosis for total yield per plant was estimated for the cross Azad T-5 × DT-2 with 62.46 over SH1 and 30.84 over SH2 followed by Sel-7 × DT-2 with 56.08 over SH1 and 25.7 over SH2 and then the cross Punjab Upma × DT-2 with 50.76 over SH1 and 21.42 over SH2. In F2 progenies inbreeding depression was also studied for 16 characters of 30 hybrids. In many crosses significant inbreeding depressions were found for the studied characters. In most of the crosses high heterosis for total yield per plant and its related traits was invariably accompanied by high inbreeding depression in F2 generation. To develop high yielding tomato hybrids the most important criteria is the selection of good parents.


Keywords: Standard heterosis, Total yield per plant, Check, Yield traits, Inbreeding depression, Hybrids.
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How to cite this article:

Sunil Kumar, M., A.K. Pal, B. Rajasekhar Reddy, Anil K. Singh and Anand K. Singh. 2017. Heterosis and Inbreeding Depression Studies for Yield and Yield Related Traits in Tomato (Solanum lycopersicum L.).Int.J.Curr.Microbiol.App.Sci. 6(11): 1240-1247. doi: https://doi.org/10.20546/ijcmas.2017.611.147