Molecular Breeding

, Volume 19, Issue 2, pp 163–177 | Cite as

QTL mapping for yield and yield contributing traits in two mapping populations of bread wheat

  • N. Kumar
  • P. L. Kulwal
  • H. S. Balyan
  • P. K. GuptaEmail author
Original Paper


In bread wheat, single-locus and two-locus QTL analyses were conducted for seven yield and yield contributing traits using two different mapping populations (P I and P II). Single-locus QTL analyses involved composite interval mapping (CIM) for individual traits and multiple-trait composite interval mapping (MCIM) for correlated yield traits to detect the pleiotropic QTLs. Two-locus analyses were conducted to detect main effect QTLs (M-QTLs), epistatic QTLs (E-QTLs) and QTL  ×  environment interactions (QE and QQE). Only a solitary QTL for spikelets per spike was common between the above two populations. HomoeoQTLs were also detected, suggesting the presence of triplicate QTLs in bread wheat. Relatively fewer QTLs were detected in P I than in P II. This may be partly due to low density of marker loci on P I framework map (173) than in P II (521) and partly due to more divergent parents used for developing P II. Six QTLs were important which were pleiotropic/coincident involving more than one trait and were also consistent over environments. These QTLs could be utilized efficiently for marker assisted selection (MAS).


Bread wheat Pleiotropic QTL Single-locus analysis Two-locus analysis 



National Agricultural Technology Project, Indian Council of Agricultural Research, New Delhi and Department of Biotechnology, Government of India supported this work. During the period of this study, N.K. and P.L.K. each held a Senior Research Fellowship of the Council of Scientific and Industrial Research (CSIR), New Delhi and P.K.G. held positions of UGC Emeritus Fellow (2002–2003) and INSA Senior Scientist. Thanks are due to Professor Jun Zhu, Zhejiang University, Hangzhou, China for conducting two-locus QTL analysis and to G.B.P.U.A. & T., Pantnagar and P.A.U., Ludhiana, India for their help in conducting field trials.


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Copyright information

© Springer Science+Business Media B.V. 2006

Authors and Affiliations

  • N. Kumar
    • 1
  • P. L. Kulwal
    • 1
    • 2
  • H. S. Balyan
    • 1
  • P. K. Gupta
    • 1
    Email author
  1. 1.Molecular Biology Laboratory, Department of Genetics & Plant BreedingCh. Charan Singh UniversityMeerutIndia
  2. 2.Department of Agricultural Botany, Biotechnology CenterDr. Panjabrao Deshmukh Agricultural UniversityAkolaIndia

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