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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
IJCMAS is now DOI (CrossRef) registered Research Journal. The DOIs are assigned to all published IJCMAS Articles.
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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 2018: 95.39
Index Copernicus ICI Journals Master List 2017 - 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 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2017.6(6): 61-73
DOI: https://doi.org/10.20546/ijcmas.2017.606.007


Concept of Heterotic Group and its Exploitation in Hybrid Breeding
Ashok Kumar Meena1*, Deshraj Gurjar2, S.S. Patil and Bheru Lal Kumhar3
1University of Agriculture Sciences Dharwad, Dharwa- 580005, India
2Maharana Pratap University of Agriculture and Technology, Udaipur, India
3Agricultural Research Station, Ummedganj, Agriculture University, Kota, India
*Corresponding author
Abstract:

Narrow genetic base is one of the most important limiting factors for yield improvement and is a bottleneck in any of the breeding programs. Information on genetic diversity and heterotic groups is very useful in inbred line development and help breeders to utilize their germplasm in a more efficient and consistent manner through exploitation of complementary lines for maximizing the outcomes of a hybrid breeding program. Development of hybrid oriented heterotic populations and application of schemes for improving combining ability is an integral part of hybrid breeding in maize and other cross pollinated crops. Broadening the genetic base of heterotic pools is a key to ensure continued genetic gain in hybrid breeding. The selection of parents and breeding strategies for the successful hybrid production will be facilitated by heterotic grouping of parental lines and determination of combining abilities of them. Assigning germplasms into different heterotic groups and patterns is fundamental for exploitation of heterosis for hybrid development. If once heterotic groups and their pattern are identified then large number of hybrid combination can be developed, within short period of time because grouping of lines in different clusters would avoid the development and evaluation of unnecessary hybrids from these heterotic patterns. Our objectives of this review are (i) Review various methods used to assign germplasm into heterotic groups and identify their heterotic pattern in different crops on the basis of experimental evidence supporting them. (ii) Listing out various heterotic groups and heterotic patterns in different crops and (iii) Examine advantages and disadvantages of the concept of heterotic groups and patterns.


Keywords: Genetic diversity, Germplasm, Heterotic groups and heterotic patterns.
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How to cite this article:

Ashok Kumar Meena, Deshraj Gurjar, S.S. Patil and Bheru Lal Kumhar. 2017. Concept of Heterotic Group and its Exploitation in Hybrid Breeding.Int.J.Curr.Microbiol.App.Sci. 6(6): 61-73. doi: https://doi.org/10.20546/ijcmas.2017.606.007