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Molecular Plant Breeding 2010, Vol.1 No.1
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Table 4 QTL for yield and yield-related traits detected in the BC
3
F
1
and BC
3
F
3
populations
QTL
Chr.
Marker Interval
BC
3
F
1
families in Guangzhou 2007
BC
3
F
3
families in Guangzhou 2008
LOD
score
Additive effect
R
2
(%)
LOD
score
Additive effect
R
2
(%)
Productive panicle number
qPPN
-
1
-
1
1
RM84
-
RM490
2.40
1.89
7.90
qPPN
-
2
-
1
2
RM341
-
RM106
5.70
9.35
28.89
qPPN
-
3
-
1
3
RM282
-
RM49
10.34 10.78
40.51
qPPN
-
7
-
1
7
RM82
-
RM1134
2.77
1.28
4.63
3.93
0.98
15.48
Seed set percentage
qSSP
-
10
-
1
10
RM222
-
RM4915
2.85
-
4.86
4.76
2.77
-
1.06
10.97
qSSP
-
11
-
1
11
RM202
-
RM287
4.50
-
8.82
23.80
qSSP
-
12
-
1
12
RM6288
-
RM6296 2.95
-
5.08
5.58
Grain yield per panicle
qGY
-
2
-
1
2
RM110
-
RM211
3.66
-
0.49
10.01
2.38
-
0.48
8.40
qGY
-
4
-
1
4
RM348
-
RM349
2.70
0.56
15.65
qGY
-
10
-
1
10
RM7492
-
RM222
2.63
0.38
5.49
Grain yield per plant
qGYP
-
1
-
1
1
RM581
-
RM24
2.02
3.68
3.29
3.29
4.19
19.63
qGYP
-
2
-
1
2
RM110
-
RM211
5.29
10.87
16.34
qGYP
-
3
-
1
3
RM282
-
RM49
9.92
13.31
24.04
Grain number per plant
qGNP
-
1
-
1
1
RM84
-
RM490
2.16
330.01
5.32
qGNP
-
2
-
1
2
RM110
-
RM211
4.86
684.72
17.23
qGNP
-
2
-
2
2
RM341
-
RM106
4.43
837.64
33.44
Spikelet number per plant
qSNP
-
2
-
1
2
RM110
-
RM211
5.12
819.87
16.67
qSNP
-
2
-
2
2
RM341
-
RM106
8.51
1073.85
31.15
background of Yuexiangzhan, which contributed up to
74.42%. This would be higher percentage than that
reported in previous studies. In previous studies, the
beneficial alleles from the same donor of wild rice
accounted for 33%, 51%, 56% and 53% by
Septiningsih
et al
. (2003a), Xiao
et al
. (1998),
Moncada
et al.
(2001), and Thomson
et al.
(2003),
respectively. And Lee
et al
. (2005)
reported 20.6%
of QTLs identified with desirable agronomic traits.
The higher percentage obtained in this study might
imply that the Gao52-9 present more favorable alleles
compared with other wild rice (
O. rufipogon
) used in
previous studies.
It is very important that the QTLs detected at different
research groups in different time are comparative and
accreditable. QTLs detected in this research can be
compared with previous QTL studies using different
parents. Nine QTLs conferring the same traits were
mapped on the same or adjacent regions that were
similar as previous reported studies.. Three QTLs
(
qGWt
-
5
-
1, qGWt
-
5
-
2, qGWt
-
11
-
1)
of these nine
accredited QTLs have a large effect, which could
predict that three mentioned QTLs be major genes.
qGWt
-
5
-
1
and
qGWt
-
11
-
1
were mapped in the same