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Molecular Plant Breeding 2010, Vol.1 No.1
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Table 1 Statistics of agronomic traits variance of Yuexiangzhan and the BC
3
F
1
families
Trait Abbv.
Unit
Yuexiangzhan
O.sativa
BC
3
F
1
families
Mean
Min.
Max.
Max.
C.V
1000
-
GW**
g
19.1
18.53
15
27.2
27.2
8.22
GN*
score
125
129.78
38.01
209.75
209.75
22.05
GNP**
score
1462.5
1772.73
460.56
5995.4
5995.4
32.32
SN**
score
139.6
177.41
81.88
312.21
312.21
19.22
SNP**
score
1633.3
2348.13
942.23
7745.1
7745.1
30.22
SSP**
percent
89.5
75.35
47.51
91.28
91.28
10.06
PPN**
score
11.7
13.22
8.5
27
27
20.66
SD**
cm
6.31
7.95
3.23
14.87
14.87
18.63
GY**
g
2.32
2.39
0.88
4.03
4.03
23
GYP*
g
27.14
31.53
11.17
83.53
83.53
29.99
Abbreviation of trait: 1000
-
GW: 1000
-
grain weight, GN: grain number per panicle, GNP: grain number per plant, SN: spikelet
number per panicle, SNP: spikelet number per plant, SSP: seed set percentage, PPN: productive panicle number, SD: spikelet density,
GY: grain yield per panicle, GYP: grain yield per plant; Marked with one asterisk * means significance at P<0.01 level; two
asterisk** means significance at P<0.001 level
Table 2 Pearson correlation coefficients among 10 traits in BC
3
F
1
population
Trait
1000
-
GW
GN
GNP
SN
SNP
SSP
PPN
SD
GY
GN
-
0.088
GNP
-
0.085
0.659
***
SN
-
0.148
*
0.855
***
0.543
***
SNP
-
0.128
*
0.565
***
0.954
***
0.588
***
SSP
0.051
0.458
***
0.348
***
0.006
0.064
PPN
-
0.116
-
0.106
0.536
***
-
0.184
**
0.546
***
0.235
SD
-
0.235
***
0.817
***
0.435
***
0.913
***
0.466
***
0.031
-
0.232
***
GY
0.243
***
0.936
***
0.615
***
0.795
***
0.504
***
0.487
***
-
0.128
*
0.696
***
GYP
0.133
*
0.689
***
0.888
***
0.538
***
0.813
***
0.419
***
0.564
***
0.418
***
0.726
***
Abbreviations of the trait listed in this table are the same as table one
Marked with one asterisk * means significance at P<0.05 level; two asterisk** means significance at P<0.01 level; three asterisk***
means significance at P<0.001 level
generated in the inter-specific and inter-subspecific
crosses, which the polymorphism ranged from
59.6%
-
90% reported by some previous studies
(Moncada et al., 2001; Septiningsih et al., 2003a; Xiao
et al., 1996; Thomson et al., 2003). Gaozhou wild rice
(G52
-
9) used in this study is one of geographic type
wild rice population in China. The reason for the low
polymorphism might be explained that the Gaozhou
wild rice used in this study has higher genetic
similarities with common rice (
O. sativa
.). Among the
162 polymorphic markers, the selected 117 SSR
Markers from mentioned above polymorphic SSRs
were employed to genotype the BC
3
F
1
population.
1.4 QTLs for yield and yield-related traits
Total of 43 QTLs were identified by using the QTL
approach of composite interval mapping (CIM). The
numbers of QTLs were from two to ten detected in
different traits, as well as the phenotypic variance
ranged from 3.74% to 40.51% among the detected
QTLs. The 43 QTLs were mapped on the ten
chromosomes except chromosomes 8 and 9. Some