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

Kumar, N. ; Kulwal, P. L. ; Balyan, H. S. ; Gupta, P. K. (2007) QTL mapping for yield and yield contributing traits in two mapping populations of bread wheat Molecular Breeding, 19 (2). pp. 163-177. ISSN 1380-3743

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Official URL: http://www.springerlink.com/content/y0253620728476...

Related URL: http://dx.doi.org/10.1007/s11032-006-9056-8

Abstract

In bread wheat, single-locus and twolocus 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).

Item Type:Article
Source:Copyright of this article belongs to Springer.
Keywords:Bread Wheat; Pleiotropic QTL; Single-locus Analysis; Two-locus Analysis
ID Code:74974
Deposited On:20 Dec 2011 05:38
Last Modified:20 Dec 2011 05:38

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