Basic HTML Version
Molecular Plant Breeding 2011, Vol.2, No.13, 92
-
97
http://mpb.sophiapublisher.com
93
plant height were located on the 1D, 2B, 4A and 4D
chromosomes, respectively, and single QTL explained
10.3%~33.8% of the phenotypic variation. Wang et al
(2008) identified three QTLs for plant height from
218 F
2:3
lines crossing between Bainong 64 and
Jingshuang 16, which were located on the 2B, 4D and
6A chromosomes, respectively. QTLs for plant height
were located on the 4D and 5A chromosomes (Chu et
al., 2008). Liu et al (2002) found seven QTLs for plant
height, which were located on the 1B, 4B (two), 6A
(two), 6D and 7A chromosomes, respectively, and
single QTL explained 5.2%~50.1% of the phenotypic
variation. Wang et al (2009) who analyze seven QTLs
for plant height in F
2
populations, which were located
on 2D, 4D, 5B and 6D chromosomes, the contribution
rate was 1.6%~20%.
Previous research has shown that the materials of
genetic and QTL mapping for plant height were
conventional wheat varieties. In this study, a
population of 234 doubled haploid derived from the
cross between BS366 (photopeiod-thermo sensitive
male sterile line) and Baiyu149, which were planted at
two place in two years, respectively, was used to
detect the QTLs for plant height based on the method
of composite interval mapping (CIM). This work will
provide theoretical basis for improvement of BS366
plant height, and reference value for molecular marker
assisted breeding of conventional wheat plant height.
1 Results
1.1 Genetic analysis
The results showed that average plant height of BS366
and Baiyu149 were 73.8 cm and 89.5 cm under the
condition of four kinds of test environmental. The
difference between the two was 15.7 cm, and
represent significant difference at the level of 0.01
possibility. Plant height analysis in DH population
showed that significant difference between strains,
and the coefficient of variation was 12%~13%.
Distributions of plant height (Figure 1) and skewness
(Table 1) from DH population indicated that plant
height have shown a continuous distribution and
two-dimensional transgressive segregation in four
Figure 1 Distribution of plant height in DH population
Note: A: Beijing 2007; B: Fu’nan 2007; C: Beijing 2008; D: Fu’nan 2008