Molecular Breeding

, Volume 19, Issue 2, pp 163–177

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. Gupta
Original Paper

DOI: 10.1007/s11032-006-9056-8

Cite this article as:
Kumar, N., Kulwal, P.L., Balyan, H.S. et al. Mol Breeding (2007) 19: 163. doi:10.1007/s11032-006-9056-8

Abstract

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).

Keywords

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

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
  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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