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Molecular Plant Breeding 2011, Vol.2, No.13, 92
-
97
http://mpb.sophiapublisher.com
92
A Letter Open Access
QTL Analysis of Plant Height in Photoperiod-thermo Sensitive Male Sterile
Wheat
Liping Zhang
1,2*
, Xiaoqin Xu
1,2*
, Chanping Zhao
1,2
, Fuhua Shan
1
, Shaohua Yuan
1
, Qun Xiang
1,2
1. Beijing Research Center for Hybrid Wheat, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097;
2. Capital Normal University, Beijing, 100048
Corresponding author email:
smzargar@rediffmail.com;
Author
* The authors who contribute equally
Molecular Plant Breeding, 2011, Vol.2 No.13 doi: 10.5376/mpb.2011.02.00013
Received: 14, Apr., 2011
Accepted: 12, Jul., 2011
Published: 20, Jul., 2011
This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and
reproduction in any medium, provided the original work is properly cited.
Preferred citation for this article:
Zhang et al., 2011, QTL Analysis of Plant Height in Photoperiod-thermo Sensitive Male Sterile Wheat, Molecular Plant Breeding Vol.2 No.13 (doi:
10.5376/mpb.2011.02.0013)
Abstract
Plant height is an important agronomic trait of wheat. Study on its genetic basis has important guiding significance in
breeding practice, variety improvement and extension. In this study, a population of 234 doubled haploid derived from the cross
between BS366 (photopeiod-thermo sensitive male sterile line) and Baiyu149 (normal variety) was used to detect the QTLs for plant
height. The individuals of the population and their parents were planted at Beijing and Funan in 2007 and 2008, respectively. Based
on the method of composite interval mapping (CIM), 25 QTLs of plant height, which were located on chromosomes 1A, 1B, 2A, 2B,
2D, 3B (two), 3D (two), 4B, 5A (two), 6A, 6B (three), 6D, 7A (three), 7B (four) and 7D chromosomes, were detected, explained
2.11%
～
9.64% of the phenotypic variation. The additive effect was between 3.35 and 16.19. Seven QTLs were detected at both
Beijing and Funan in 2007, which were located on 1B, 2A, 3B (2), 3D, and 6B (2). While five QTLs were detected in the two
locations in 2008, which were located on 2B, 6B, 7B (2), and 7D. The QTLs on chromosome 7A were only found in Beijing, a
possible explanation was that different environments induced varied heterogenic expression. One QTL on 6B was detected under four
envirenments, which suggested that the QTL was stable across environments and could be applied for marker-assisted breeding.
Keywords
Wheat (
Triticum aestivum
L.); Plant height; QTL
Background
Wheat is one of the most important grain crops in
China, plant height is an important factor affecting
wheat yield, varieties with excessive plant height are
susceptible to lodging under the condition of high
fertilizer, which results in decreased yield; varieties
with excessive plant dwarfed are susceptible to
crowding of canopy leaves, and with bad ventilation
and light transmission in at middle to bottom part,
which affects seed-filling, thus results in abortive
grain and decreased yield. Plant height is important
objective traits in wheat breeding. Study on its genetic
basis has important guiding significance in breeding
practice, variety improvement and extension. Since
the application of Nonglin 10 harboring dwarf gene in
wheat breeding in the 1960s, more than 20 dwarf
genes were identified (Cheng et al., 1995, Crops, (4):
36-37; Li et al., 1998). Among them, Rht1 and Rht2
from Nonglin 10 and Rht8 from red wheat were
mainly used in wheat breeding, and they were located
on the 4BS, 4DS, and 2DS chromosomes, respectively
(Liu et al., 2003, Genetics Research in China-Abstract
Book of the 7
th
Conference in Genetics Society of
China, pp.128-129). At present, wheat production
increased significantly due to breeding and
popularization of the varieties harboring dwarf gene
and semi-dwarf gene in the global.
Wheat plant height is usually show quantitative trait,
which is controlled major dwarf genes and
quantitative trait loci (QTL) affected. With the
development of quantitative genetics, more and more
QTLs of plant height were found. Results of previous
studies showed that the major portion of 21
chromosomes in wheat related to the genetic variation
of plant height (Ellis et al., 2005). Zhou et al (2004)
who used the 104 RIL lines crossing between
wangshuibai and Alondra, obtained four QTLs for