Detection of QTLs for Yield Heterosis in Rice Using a RIL Population and Its Testcross Population
Table 5
QTLs associated with yield traits detected for the phenotypic performance in the recombinant inbred line and testcross populations and for the mid-parent heterosis ().
Interval
RIL
Testcross
R2
Effect
R2
Effect
R2
NP
qNP2
RM240-RM207
0.66
9.49
0.94
4.98
D
qNP9
RM8206-RM219
0.35
4.06
A
NGP
qNGP2
RM240-RM207
−13.06
6.80
−12.17
2.11
D
qNGP3
RM15303-RM16
−6.68
3.42 (0.68)
−10.32
1.83
D
qNGP4
RM349-RM3333
4.62
1.51
A
qNGP5
RM274-RM334
5.28
1.38
A
qNGP6.1
RM190-RM587
7.31
0.52
8.30
2.31
OD
qNGP6.2
RM549-RM3330
−4.95
1.09
A
qNGP7
RM70-RM18
−5.54
1.39
−10.99
1.64
D
qNGP10
RM6704-RM3773
18.88
7.39
22.31
23.01
OD
NSP
qNSP2
RM6-RM207
−14.06
7.50
−19.16
1.69
D
qNSP3.1
RM15139-RM15303
−5.46
1.32
A
qNSP3.2
RM15717-RM6759
−7.62
0.60
−7.19
2.99
OD
qNSP4
RM6992-RM349
6.24
1.21
A
qNSP5
RM274-RM334
6.04
1.10
A
qNSP6
RM276-RM549
−7.47
1.50
−9.81
0.76
D
qNSP7
RM70-RM18
−6.55
1.78
A
qNSP12
RM511-RM28313
6.13
1.01
11.50
0.97
D
SF
qSF1
RM11869-RM12178
−1.62
3.31
A
qSF2
RM6-RM240
1.39
3.63
A
qSF3
RM15303-RM16
−1.28
3.84
−3.95
2.93
D
qSF5.1
RM18038-RM18189
2.29
7.76 (1.21)
A
qSF5.2
RM274-RM334
3.72
0.99
OD
qSF6
RM190-RM587
4.46
2.20
3.71
1.28
OD
qSF8
RM23001-RM210
1.38
3.68
A
qSF10
RM6704-RM3123
1.04
1.93 (1.05)
10.88
27.21 (3.22)
10.09
22.81 (4.48)
OD
qSF12
RM28313-RM28597
−2.06
3.69
A
TGW
qTGW1
RM11869-RM12178
0.58
4.44
A
qTGW2.1
RM13576-RM263
0.54
5.65
A
qTGW2.2
RM207-RM266
0.36
5.18
0.61
8.84
D
qTGW3.1
RM14383-RM14629
−0.67
1.94
OD
qTGW3.2
RM15139-RM16
1.45
27.21
2.33
37.83
0.84
6.65
D
qTGW5
RM437-RM18189
−1.25
17.71
−0.90
6.16
0.41
1.48
D
qTGW6
RM3330-RM7193
0.45
1.80
OD
qTGW10
RM3123-RM228
−0.32
1.25
−0.51
1.98
D
qTGW12
RM28597-RM17
0.55
3.79
A
GY
qGY2
RM6-RM240
−1.17
3.63 (1.54)
A
qGY5
RM18038-RM18189
−3.89
4.12
−3.15
3.69
OD
qGY10
RM6704-RM6100
3.55
4.87
3.09
5.11
OD
, number of panicles per plant; NGP, number of grains per panicle; NSP, number of spikelets per panicle; SF, spikelet fertility; TGW, 1000-grain weight; GY, grain yield per plant. are designated following the rules recommended by McCouch and CGSNL [31]. the QTL effects were significant at the level of . In the RIL, the effect refers to the additive effect of replacing a Teqing allele with an IR24 allele. In the testcross, the effect refers to the increase of genetic effect when a Zhong 9A/Teqing heterozygote is replaced with a Zhong 9A/IR24 heterozygote. In , the effect refers to the increase of dominance effect when a Zhong 9A/Teqing heterozygote is replaced with a Zhong 9A/IR24 heterozygote. of phenotypic variance explained by the given QTL. Value in parenthesis refers to the contribution due to genotype-by-environment interaction. , genetic action mode. A, additive; D, dominance; OD, overdominance.
