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Genome-wide QTL analysis for pre-harvest sprouting tolerance in bread wheat

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Title Genome-wide QTL analysis for pre-harvest sprouting tolerance in bread wheat
 
Creator Mohan, Amita
Kulwal, Pawan
Singh, Ravinder
Kumar, Vinay
Mir, Reyazul Rouf
Kumar, Jitendra
Prasad, Manoj
Balyan, H. S.
Gupta, P. K.
 
Subject Bread wheat
Pre-harvest sprouting
Main-effect QTL
Epistatic QTL
 
Description A framework linkage map comprising
214 molecular marker (SSR, AFLP, SAMPL) loci
was prepared using an intervarietal recombinant
inbred line (RIL) mapping population of bread wheat.
The RIL population that was developed from the
cross SPR8198 (red-grained and PHS tolerant geno-
type) 9 HD2329 (white-grained and PHS susceptible
genotype) following single seed descent segregated
for pre-harvest sprouting (PHS). The RIL population
and parental genotypes were evaluated in six differ-
ent environments and the data on PHS were collected.
Using the linkage map and PHS data, genome-wide
single-locus and two-locus QTL analyses were con-
ducted for PHS tolerance (PHST). Single-locus
analysis following composite interval mapping
(CIM) detected a total of seven QTL, located on
specific arms of five different chromosome (1AS,2AL, 2DL, 3AL and 3BL). These seven QTL
included two major QTL one each on 2AL and
3AL. Two of these seven QTL were also detected
following two-locus analysis, which resolved a total
of four main-effect QTL (M-QTL), and 12 epistatic
QTL (E-QTL), the latter involved in 7 QTL 9 QTL
interactions. Interestingly, none of these M-QTL and
E-QTL detected by two-locus analysis was involved
in Q 9 E and Q 9 Q 9 E interactions, supporting
the results of ANOVA, where genotype 9 environ-
ment interaction were non-significant. The QTL for
PHS detected in the present study may be efficiently
utilized for marker-aided selection for enhancing PHST in bread wheat.
This work was supported by Department
of Biotechnology (DBT), Government of India, New Delhi and
the Indian National Science Academy (INSA), New Delhi. The
support by the DST through FIST-programme and by the
University Grants Commission (UGC), New Delhi through
SAP-DRS programme is also gratefully acknowledged
 
Date 2014-02-12T10:17:09Z
2014-02-12T10:17:09Z
2009
24 October 2008
 
Type Article
 
Identifier Euphytica, 168: 319-329
http://hdl.handle.net/123456789/123
 
Language en
 
Publisher Springer