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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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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.2017.6(6): 1443-145
DOI: https://doi.org/10.20546/ijcmas.2017.606.169


Mapping of QTLs for Grain Yield and its Component Traits under Drought Stress in Elite Rice Variety of Assam
Rahul K. Verma1, S.K. Chetia2, P.C. Dey3, A.R. Baruah4 and M.K. Modi5
1Department of Agricultural Biotechnology, Jorhat, India
2Regional Agricultural Research Station, Titabar, India
*Corresponding author
Abstract:

Drought is one of the major abiotic stress that limits rice production in Assam, India. A traditional drought tolerant local cultivar ‘Banglami’ was crossed with a high yielding rice variety ‘Ranjit’ and 180 F2 plants were raised. The 110 polymorphic SSR markers were used for genotyping of F2 plants. Out of which, 88 fitted the expected Mendelian segregation, whereas 22 (20.0%) significantly deviated from it (P<0.01). Only 89 SSR markers could be assigned to 12 linkage groups covering a total of 1628.7 cM of the genome. The 120 F2:4 lines were evaluated for various yield traits under drought stress and irrigated conditions. A total of 11 QTLs were identified for grain yield and its component traits with the phenotypic variation ranging from 0.04% to 84% under both hydrological conditions. The QTL for effective booting tillers remained consistent on chromosome 6 under both conditions. The clustering of QTLs was observed for panicle length, number of chaff per panicle and spikelet fertility at the marker interval of RM253-RM30 on chromosome 6. Thus with further fine mapping of these region, it may be possible to tightly tag the QTLs for precise introgression in MAB. The two improved advanced lines (B-42 and B-106) were selected based on yield and grain quality traits under drought stress for development of drought tolerant rice variety in elite genetic background.


Keywords: Rice,Grain yield, Drought tolerance, QTL mapping.
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How to cite this article:

Rahul K. Verma, S.K. Chetia, P.C. Dey, A.R. Baruah and Modi, M.K. 2017. Mapping of QTLs for Grain Yield and Its Component Traits under Drought Stress in Elite Rice Variety of Assam.Int.J.Curr.Microbiol.App.Sci. 6(6): 1443-145. doi: https://doi.org/10.20546/ijcmas.2017.606.169