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Rice Science ›› 2019, Vol. 26 ›› Issue (4): 248-256.DOI: 10.1016/j.rsci.2019.04.005

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  • 收稿日期:2019-01-28 接受日期:2019-04-28 出版日期:2019-07-28 发布日期:2019-04-04

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. [J]. Rice Science, 2019, 26(4): 248-256.

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链接本文: http://www.ricesci.org/CN/10.1016/j.rsci.2019.04.005

               http://www.ricesci.org/CN/Y2019/V26/I4/248

图/表 12

Table 1 Information of the plant materials.
Species GM variety Non-GM variety
Rice Huahui 1, II Kefeng 6, Kefeng 6, Bar 68-1, Wan 21B, Kangyou 97 II Minghui 86, Minghui 86, Minghui 63, Shanyou 10, Shanyou 63, 80-4B, Donglong, Songjing 6, Zhonghua 11, Zhongzuo 58, Sanjiang 1, Liaojing 371
Cotton LLcotton25, Mon15985, Mon1445, Mon88913 Non-GM variety
Maize Bt176, TC1507,
Mon810, Mon863
Non-GM variety
Soybean Mon89788, A5547-127, GTS40-3-2 Non-GM variety
Beet H7-1 Non-GM variety
Rapeseed GT73, ToPas19/2
Papaya Huanong 1
Tomato Tomato
Potato Potato
Gramineous plant Wheat, oats, barley, mung bean, buckwheat
Model plant Arabidopsis, cauliflower, tobacco
GM, Genetically modified.

Table 1 Information of the plant materials.

Species GM variety Non-GM variety
Rice Huahui 1, II Kefeng 6, Kefeng 6, Bar 68-1, Wan 21B, Kangyou 97 II Minghui 86, Minghui 86, Minghui 63, Shanyou 10, Shanyou 63, 80-4B, Donglong, Songjing 6, Zhonghua 11, Zhongzuo 58, Sanjiang 1, Liaojing 371
Cotton LLcotton25, Mon15985, Mon1445, Mon88913 Non-GM variety
Maize Bt176, TC1507,
Mon810, Mon863
Non-GM variety
Soybean Mon89788, A5547-127, GTS40-3-2 Non-GM variety
Beet H7-1 Non-GM variety
Rapeseed GT73, ToPas19/2
Papaya Huanong 1
Tomato Tomato
Potato Potato
Gramineous plant Wheat, oats, barley, mung bean, buckwheat
Model plant Arabidopsis, cauliflower, tobacco
GM, Genetically modified.
Table 2 The detailed sequences of the PCR primers and probes for quanlitative PCR.
Gene Primer Primer sequence (5′-3′) Product size (bp) Annealing temperature (ºC) Reference
PLD PLD-F
PLD-R
PLD-P
TGGTGAGCGTTTTGCAGTCT
CTGATCCACTAGCAGGAGGTCC
FAM-GTTGTGCTGCCAATGTGGCCTG-TAMRA
68 58 JRC, 2006
PLD-F1
PLD-R1
CGGCTTGGGATGTGCTCTA
TGGATGCTCCTGTCAATGGTG
268 54
PLD-F2
PLD-R2
CTGAGTGTCGTCTGTGGGTGTTCC
CCGTGCTAAAGATGGGTGAGG
245 58
PLD-F3
PLD-R3
GAACAACACCATTGACAGGAGCAT
CCACATTGGCAGCACAACATAGA
241 56
SPS SPS-F
SPS-R
SPS-P
CGGTTGATCTTTTCGGGATG
TTGCGCCTGAACGGATAT
FAM-GACGCACGGACGGCTCGGA-TAMRA
81 54 Ding et al, 2004
SPS-F1
SPS-R1
TTGCGCCTGAACGGATAT
GGAGAAGCACTGGACGAGG
277 54 Jiang et al, 2009
SPS-F2
SPS-R2
GCCATGGATTACATATGGCAAGA
ATCTGTTTACTCGTCAAGTGTCATCTC
287 56
RBE4 RBE4-F
RBE4-R
RBE4-P
GTTTTAGTTGGGTGAAAGCGGTT
CCTGTTAGTTCTTCCAATGCCCTTA
FAM-TCTGGTTGGGAATAGATACT-MGBNFQ
106 54 Jeong et al, 2007
RBE4-F1
RBE4-R1
TCCAATGCCCTTAAACTTTATCA AACGATCTAATTCTGGGCTTTAT 206 54 Jeong et al, 2007
RBE4-F2 RBE4-R2 AGGGCATTGGAAGAACTAACAG
CACCACCATCTTGAACAGGAAT
264 54
RBE4-F3
RBE4-R3
TAGTTGGGTGAAAGCGGTTAG
CACCACCATCTTGAACAGGAAT
343 54
GOS9 GOS9-F
GOS9-R
GOS9-P
TTAGCCTCCCGCTGCAGA
AGAGTCCACAAGTGCTCCCG
FAM-CGGCAGTGTGGTTGGTTTCTTCGG-TAMRA
68 56 Hernández et al, 2005
GOS9-F1
GOS9-R1
ACTTACGGGATGGTCTTTGCA
GCAATCAATCCATTACCTGCTC
255 54
GOS9-F2
GOS9-R2
TAAGTTGCTTCGACGTACAGGA
TAGATGACGGTGACGAGGATAGAGT
303 56
GOS9-F3
GOS9-R3
GCTGCCCGTTAATACATGTTCCT
CTAAAAGCAGTTCCACCACCTTGT
301 56
PEPC PEPC-F
PEPC-R
PEPC-P
TAGGAATCACGGATACGCA
TGAACTCAGGTTGCTGGAC
FAM-AGGGAGATCCTTACTTGAGGCAGAGAC-TAMRA
80 54
PEPC-F1
PEPC-R1
GGTCCCTGATACGCTTTA
TCTGCCCACTCACTGCTA
153 54
PEPC-F2
PEPC-R2
GCCGTTGTCGCTTGTTGTGTTC
CAGAGACTGCGTATCCGTGATTCCT
183 60
PEPC-F3
PEPC-R3
TCCCTCCAGAAGGTCTTTGTGTC
GCTGGCAACTGGTTGGTAATG
271 56

Table 2 The detailed sequences of the PCR primers and probes for quanlitative PCR.

Gene Primer Primer sequence (5′-3′) Product size (bp) Annealing temperature (ºC) Reference
PLD PLD-F
PLD-R
PLD-P
TGGTGAGCGTTTTGCAGTCT
CTGATCCACTAGCAGGAGGTCC
FAM-GTTGTGCTGCCAATGTGGCCTG-TAMRA
68 58 JRC, 2006
PLD-F1
PLD-R1
CGGCTTGGGATGTGCTCTA
TGGATGCTCCTGTCAATGGTG
268 54
PLD-F2
PLD-R2
CTGAGTGTCGTCTGTGGGTGTTCC
CCGTGCTAAAGATGGGTGAGG
245 58
PLD-F3
PLD-R3
GAACAACACCATTGACAGGAGCAT
CCACATTGGCAGCACAACATAGA
241 56
SPS SPS-F
SPS-R
SPS-P
CGGTTGATCTTTTCGGGATG
TTGCGCCTGAACGGATAT
FAM-GACGCACGGACGGCTCGGA-TAMRA
81 54 Ding et al, 2004
SPS-F1
SPS-R1
TTGCGCCTGAACGGATAT
GGAGAAGCACTGGACGAGG
277 54 Jiang et al, 2009
SPS-F2
SPS-R2
GCCATGGATTACATATGGCAAGA
ATCTGTTTACTCGTCAAGTGTCATCTC
287 56
RBE4 RBE4-F
RBE4-R
RBE4-P
GTTTTAGTTGGGTGAAAGCGGTT
CCTGTTAGTTCTTCCAATGCCCTTA
FAM-TCTGGTTGGGAATAGATACT-MGBNFQ
106 54 Jeong et al, 2007
RBE4-F1
RBE4-R1
TCCAATGCCCTTAAACTTTATCA AACGATCTAATTCTGGGCTTTAT 206 54 Jeong et al, 2007
RBE4-F2 RBE4-R2 AGGGCATTGGAAGAACTAACAG
CACCACCATCTTGAACAGGAAT
264 54
RBE4-F3
RBE4-R3
TAGTTGGGTGAAAGCGGTTAG
CACCACCATCTTGAACAGGAAT
343 54
GOS9 GOS9-F
GOS9-R
GOS9-P
TTAGCCTCCCGCTGCAGA
AGAGTCCACAAGTGCTCCCG
FAM-CGGCAGTGTGGTTGGTTTCTTCGG-TAMRA
68 56 Hernández et al, 2005
GOS9-F1
GOS9-R1
ACTTACGGGATGGTCTTTGCA
GCAATCAATCCATTACCTGCTC
255 54
GOS9-F2
GOS9-R2
TAAGTTGCTTCGACGTACAGGA
TAGATGACGGTGACGAGGATAGAGT
303 56
GOS9-F3
GOS9-R3
GCTGCCCGTTAATACATGTTCCT
CTAAAAGCAGTTCCACCACCTTGT
301 56
PEPC PEPC-F
PEPC-R
PEPC-P
TAGGAATCACGGATACGCA
TGAACTCAGGTTGCTGGAC
FAM-AGGGAGATCCTTACTTGAGGCAGAGAC-TAMRA
80 54
PEPC-F1
PEPC-R1
GGTCCCTGATACGCTTTA
TCTGCCCACTCACTGCTA
153 54
PEPC-F2
PEPC-R2
GCCGTTGTCGCTTGTTGTGTTC
CAGAGACTGCGTATCCGTGATTCCT
183 60
PEPC-F3
PEPC-R3
TCCCTCCAGAAGGTCTTTGTGTC
GCTGGCAACTGGTTGGTAATG
271 56
Supplemetnal Table 1 Final real-time quantitative PCR reaction systems and programs.
Reaction system (µL) Reaction program
2×FastStart Universal Probe Master dNTP
(10 Mm)
Primer Each
(10 µM)
Probe
(10 µM)
DNA
(50 ng/μL)
Step1 Step 2 Cycles of Step 2
SPS-F/R/P 10 0.4 0.8 0.4 1.0 95 °C
10 min
95 °C
15 s
60 °C
60 s
40
PLD-F/R/P 10 0.4 0.4 0.4 1.0 95 °C
10 min
95 °C
15 s
60 °C
60 s
45
RBE4-F/R/P 10 1.0 1.0 0.4 1.0 95 °C
10 min
95 °C
30 s
60 °C
60 s
40
GOS-F/R/P 10 1.6 0.6 0.4 1.0 95 °C
10 min
95 °C
30 s
60 °C
60 s
40
PEPC-F/R/P 10 0.4 0.8 0.4 1.0 95 °C
10 min
95 °C
15 s
60 °C
60 s
40

Supplemetnal Table 1 Final real-time quantitative PCR reaction systems and programs.

Reaction system (µL) Reaction program
2×FastStart Universal Probe Master dNTP
(10 Mm)
Primer Each
(10 µM)
Probe
(10 µM)
DNA
(50 ng/μL)
Step1 Step 2 Cycles of Step 2
SPS-F/R/P 10 0.4 0.8 0.4 1.0 95 °C
10 min
95 °C
15 s
60 °C
60 s
40
PLD-F/R/P 10 0.4 0.4 0.4 1.0 95 °C
10 min
95 °C
15 s
60 °C
60 s
45
RBE4-F/R/P 10 1.0 1.0 0.4 1.0 95 °C
10 min
95 °C
30 s
60 °C
60 s
40
GOS-F/R/P 10 1.6 0.6 0.4 1.0 95 °C
10 min
95 °C
30 s
60 °C
60 s
40
PEPC-F/R/P 10 0.4 0.8 0.4 1.0 95 °C
10 min
95 °C
15 s
60 °C
60 s
40
Table 3 The interspecific specificity of the five endogenous reference genes among the 29 non-rice species using qualitative PCR.
Species/Variety GOS9 PEPC PLD RBE4 SPS
F/R F1/R1 F2/R2 F3/R3 F/R F1/R1 F2/R2 F3/R3 F/R F1/R1 F2/R2 F3/R3 F/R F1/R1 F2/R2 F3/R3 F/R F1/R1 F2/R2
Non-GM cotton - - - - P - - - - - - - - - - P P - -
LLcotton25 - - - - P - - - - - - - - - P - P - -
Mon15985 - - - - P - - - - - - - - - P P P - -
Mon1445 - - - - P - - - - - - - - - P P P - -
Mon88913 - - - - P - - - - - - - - - - - P - -
Non-GM maize - - - - P - - - P - - P - - - - P - -
Bt176 - - - - P - - - P - - - - P - - P - -
TC1507 - - - - P - - - P - - - - - - - P - -
Mon810 - - - - P - - - P - - P - - - - P - -
Mon863 - - - - P - - - P - - P - - - - P - -
Non-GM soybean - - - - P - - - - - - - - - P - P - -
Mon89788 - - - - P - - - - P - - - - P P P - -
A5547-127 - - - - P - - - - - - - - - P P P - -
GTS40-3-2 - - P - P - - - - - - - - - P - P - -
GT73 - - - - P - - - - - P P - - - - P - -
ToPas19/2 - - - - P - - - - - P P - - - P P - -
Non-GM beet - - - - P - - - - - - - - - - - - - -
H7-1 - - - - P - - - - - - - - - - - - - -
Papaya - - - - - - - - - - - - - - - P P - -
Tomato - - - - P - - - - - - - - - - P P - -
Wheat - - - - P - - - - - - P - - - - P - -
Oat - - - - P - - - - - - P - - - - P - -
Barley - - - - P - P - - - - P - P - - P - -
Tobacco - P - - P - - - - - - - - - - - P - -
Cauliflower - - P - P - - - - - - P - - - - P - -
Mung bean - - - - P - - - P P - - - - - P P - -
Potato - - - - P - - - - - - - - - - P P - -
Buckwheat - - - - P - - - - - - - - - - - P - -
Arabidopsis - - - - - - - - - - - - - - - - P - -
‘P’ means the positive result and ‘-’ means the negative result.

Table 3 The interspecific specificity of the five endogenous reference genes among the 29 non-rice species using qualitative PCR.

Species/Variety GOS9 PEPC PLD RBE4 SPS
F/R F1/R1 F2/R2 F3/R3 F/R F1/R1 F2/R2 F3/R3 F/R F1/R1 F2/R2 F3/R3 F/R F1/R1 F2/R2 F3/R3 F/R F1/R1 F2/R2
Non-GM cotton - - - - P - - - - - - - - - - P P - -
LLcotton25 - - - - P - - - - - - - - - P - P - -
Mon15985 - - - - P - - - - - - - - - P P P - -
Mon1445 - - - - P - - - - - - - - - P P P - -
Mon88913 - - - - P - - - - - - - - - - - P - -
Non-GM maize - - - - P - - - P - - P - - - - P - -
Bt176 - - - - P - - - P - - - - P - - P - -
TC1507 - - - - P - - - P - - - - - - - P - -
Mon810 - - - - P - - - P - - P - - - - P - -
Mon863 - - - - P - - - P - - P - - - - P - -
Non-GM soybean - - - - P - - - - - - - - - P - P - -
Mon89788 - - - - P - - - - P - - - - P P P - -
A5547-127 - - - - P - - - - - - - - - P P P - -
GTS40-3-2 - - P - P - - - - - - - - - P - P - -
GT73 - - - - P - - - - - P P - - - - P - -
ToPas19/2 - - - - P - - - - - P P - - - P P - -
Non-GM beet - - - - P - - - - - - - - - - - - - -
H7-1 - - - - P - - - - - - - - - - - - - -
Papaya - - - - - - - - - - - - - - - P P - -
Tomato - - - - P - - - - - - - - - - P P - -
Wheat - - - - P - - - - - - P - - - - P - -
Oat - - - - P - - - - - - P - - - - P - -
Barley - - - - P - P - - - - P - P - - P - -
Tobacco - P - - P - - - - - - - - - - - P - -
Cauliflower - - P - P - - - - - - P - - - - P - -
Mung bean - - - - P - - - P P - - - - - P P - -
Potato - - - - P - - - - - - - - - - P P - -
Buckwheat - - - - P - - - - - - - - - - - P - -
Arabidopsis - - - - - - - - - - - - - - - - P - -
‘P’ means the positive result and ‘-’ means the negative result.
Fig. 1. Qualitative detection sensitivity of the five primers. A, PEPC-F1/R1. B, SPS-F1/R1. C, GOS9-F3/R3. D, SPS-F2/R2. E, PEPC-F3/R3. Lane M, 100 bp marker; Lane N, Negative control; Lane P, Positive control; Lanes 1 to 9, 10%, 5%, 1%, 0.5%, 0.1%, 0.05%, 0.01%, 0.005% and 0% of DNA concentrations, respectively.

Fig. 1. Qualitative detection sensitivity of the five primers. A, PEPC-F1/R1. B, SPS-F1/R1. C, GOS9-F3/R3. D, SPS-F2/R2. E, PEPC-F3/R3. Lane M, 100 bp marker; Lane N, Negative control; Lane P, Positive control; Lanes 1 to 9, 10%, 5%, 1%, 0.5%, 0.1%, 0.05%, 0.01%, 0.005% and 0% of DNA concentrations, respectively.

Supplemental Fig. 1. Intraspecific specificity of the five endogenous reference genes among the 18 rice varieties.Lane M, 100 bp marker; Lane N, negative control; P, Positive control; Lanes 2-17, Huahui 1, II Kefeng 6, II Minghui 86, Shanyou 10, Wan 21B, Shanyou 63, Kangyou 97, 80-4B, Minghui 86, Bar68-1, Donglong, Kefeng 6, Minghui 63, Songjing 6, Zhonghua 11, Zhongzuo 58, Sanjiang 1 and Liaojing 371, respectively.

Supplemental Fig. 1. Intraspecific specificity of the five endogenous reference genes among the 18 rice varieties.Lane M, 100 bp marker; Lane N, negative control; P, Positive control; Lanes 2-17, Huahui 1, II Kefeng 6, II Minghui 86, Shanyou 10, Wan 21B, Shanyou 63, Kangyou 97, 80-4B, Minghui 86, Bar68-1, Donglong, Kefeng 6, Minghui 63, Songjing 6, Zhonghua 11, Zhongzuo 58, Sanjiang 1 and Liaojing 371, respectively.

Table 4 Optimized PCR reaction of the five selected specific primers.
Primer Annealing temperature
(ºC)
Final concentration
(µmol/L)
GOS9-F3/R3 58 0.1
SPS-F1/R1 56 0.4
SPS-F2/R2 58 0.1
PEPC-F1/R1 56 0.2
PEPC-F3/R3 58 0.1

Table 4 Optimized PCR reaction of the five selected specific primers.

Primer Annealing temperature
(ºC)
Final concentration
(µmol/L)
GOS9-F3/R3 58 0.1
SPS-F1/R1 56 0.4
SPS-F2/R2 58 0.1
PEPC-F1/R1 56 0.2
PEPC-F3/R3 58 0.1
Table 5 Interspecific specificity (Ct values) of the five endogenous reference genes among the 29 non-rice species using real-time PCR.
Species Variety PLD SPS GOS9 RBE4 PEPC
Cotton LLcotton25 39.60 - - - -
Maize Non-GM variety - 39.69 36.96/37.76/37.79 - 39.31
TC1507 - - - 38.28/36.97/36.80 -
Mon863 - - - 38.51 -
Soybean Non-GM variety - - 38.98 38.19 -
Mon89788 - 39.31 - 39.19 -
GTS40-3-2 - - - - 39.14
Rapeseed GT73 - - - 39.05 -
Beet Non-GM variety 39.36/38.50/38.42 - 38.16/39.81/38.19 38.28/37.99/37.43 39.98
H7-1 - - 39.28 - -
Tomato Non-GM variety - - 39.94/37.68 - -
Oat Non-GM variety - - 38.03 - -
Barley Non-GM variety - - 38.29 - -
Tobacco Non-GM variety - - 36.58/37.48/38.54 - -
Cauliflower Non-GM variety - - 39.49 38.19 -
Potato Non-GM variety - - 39.55 39.35 -
Buck wheat Non-GM variety - - 39.26 39.24 39.28
Arabidopsis Non-GM variety - - 39.32/39.51 37.27/38.30/37.68 -
Rice Kefeng 6 30.11/30.09/29.92 33.86/34.21/34.43 30.16/30.00/30.07 29.79/29.88/29.67 31.02/30.76/31.43
‘-’ means data are not available. Species with no Ct values for all the genes are not shown.

Table 5 Interspecific specificity (Ct values) of the five endogenous reference genes among the 29 non-rice species using real-time PCR.

Species Variety PLD SPS GOS9 RBE4 PEPC
Cotton LLcotton25 39.60 - - - -
Maize Non-GM variety - 39.69 36.96/37.76/37.79 - 39.31
TC1507 - - - 38.28/36.97/36.80 -
Mon863 - - - 38.51 -
Soybean Non-GM variety - - 38.98 38.19 -
Mon89788 - 39.31 - 39.19 -
GTS40-3-2 - - - - 39.14
Rapeseed GT73 - - - 39.05 -
Beet Non-GM variety 39.36/38.50/38.42 - 38.16/39.81/38.19 38.28/37.99/37.43 39.98
H7-1 - - 39.28 - -
Tomato Non-GM variety - - 39.94/37.68 - -
Oat Non-GM variety - - 38.03 - -
Barley Non-GM variety - - 38.29 - -
Tobacco Non-GM variety - - 36.58/37.48/38.54 - -
Cauliflower Non-GM variety - - 39.49 38.19 -
Potato Non-GM variety - - 39.55 39.35 -
Buck wheat Non-GM variety - - 39.26 39.24 39.28
Arabidopsis Non-GM variety - - 39.32/39.51 37.27/38.30/37.68 -
Rice Kefeng 6 30.11/30.09/29.92 33.86/34.21/34.43 30.16/30.00/30.07 29.79/29.88/29.67 31.02/30.76/31.43
‘-’ means data are not available. Species with no Ct values for all the genes are not shown.
Table 6 Intraspecific specificity (Ct values) of the three endogenous reference genes among 18 rice varieties using real-time PCR.
Variety PLD SPS PEPC
Huahui 1 26.98 29.44 27.77
II Kefeng 6 27.01 29.49 27.73
II Minghui 86 26.58 29.08 27.32
Shanyou 10 27.27 29.97 28.08
Wan 21B 27.45 29.94 28.15
Shanyou 63 27.10 29.80 27.69
Kangyou 97 27.01 29.61 27.62
80-4B 27.28 29.98 27.99
Minghui 86 26.15 28.56 27.01
Bar 68-1 26.58 29.11 27.47
Donglong 26.60 29.10 27.29
Kefeng 6 26.50 29.22 27.41
Minghui 63 27.04 29.82 28.12
Songjing 6 26.09 29.32 27.51
Zhonghua 11 26.66 29.31 27.56
Zhongzuo 58 27.27 29.78 27.91
Sanjiang 1 27.17 29.52 27.82
Liaojing 371 27.05 29.57 27.59
Average 26.92 29.48 27.67
SD value 0.34 0.38 0.31
RSD (%) 1.26 1.29 1.13
RSD, Relative standard deviation.

Table 6 Intraspecific specificity (Ct values) of the three endogenous reference genes among 18 rice varieties using real-time PCR.

Variety PLD SPS PEPC
Huahui 1 26.98 29.44 27.77
II Kefeng 6 27.01 29.49 27.73
II Minghui 86 26.58 29.08 27.32
Shanyou 10 27.27 29.97 28.08
Wan 21B 27.45 29.94 28.15
Shanyou 63 27.10 29.80 27.69
Kangyou 97 27.01 29.61 27.62
80-4B 27.28 29.98 27.99
Minghui 86 26.15 28.56 27.01
Bar 68-1 26.58 29.11 27.47
Donglong 26.60 29.10 27.29
Kefeng 6 26.50 29.22 27.41
Minghui 63 27.04 29.82 28.12
Songjing 6 26.09 29.32 27.51
Zhonghua 11 26.66 29.31 27.56
Zhongzuo 58 27.27 29.78 27.91
Sanjiang 1 27.17 29.52 27.82
Liaojing 371 27.05 29.57 27.59
Average 26.92 29.48 27.67
SD value 0.34 0.38 0.31
RSD (%) 1.26 1.29 1.13
RSD, Relative standard deviation.
Table 7 Quantitative detection sensitivity of the three endogenous reference genes.
Gene Parameter Ct value R2 Efficiency (%)
50 ng (1.06 × 105) 5 ng (1.06 × 104) 0.5 ng (1.06 × 103) 0.05 ng (106) 0.005 ng (10.6) 0.0025 ng (5.03)
PLD Mean ± SD 21.90 ± 0.10 25.27 ± 0.08 28.64 ± 0.13 32.11 ± 0.10 35.41 ± 0.59 37.09 ± 0.75 0.997 94.90
RSD 0.432 0.314 0.469 0.299 1.665 2.015
SPS Mean ± SD 25.05 ± 0.02 28.05 ± 0.15 31.45 ± 0.10 34.81 ± 0.16 37.85 ± 0.17 39.29 ± 0.30 0.998 101.90
RSD 0.061 0.054 0.322 0.468 0.451 0.775
PEPC Mean ± SD 21.17 ± 0.01 24.55 ± 0.08 28.06 ± 0.01 31.34 ± 0.12 34.79 ± 0.25 35.86 ± 0.23 0.999 96.90
RSD 0.047 0.333 0.036 0.373 0.725 0.064
RSD, Relative standard deviation. Data in the parenthesis are the copy number of DNA.

Table 7 Quantitative detection sensitivity of the three endogenous reference genes.

Gene Parameter Ct value R2 Efficiency (%)
50 ng (1.06 × 105) 5 ng (1.06 × 104) 0.5 ng (1.06 × 103) 0.05 ng (106) 0.005 ng (10.6) 0.0025 ng (5.03)
PLD Mean ± SD 21.90 ± 0.10 25.27 ± 0.08 28.64 ± 0.13 32.11 ± 0.10 35.41 ± 0.59 37.09 ± 0.75 0.997 94.90
RSD 0.432 0.314 0.469 0.299 1.665 2.015
SPS Mean ± SD 25.05 ± 0.02 28.05 ± 0.15 31.45 ± 0.10 34.81 ± 0.16 37.85 ± 0.17 39.29 ± 0.30 0.998 101.90
RSD 0.061 0.054 0.322 0.468 0.451 0.775
PEPC Mean ± SD 21.17 ± 0.01 24.55 ± 0.08 28.06 ± 0.01 31.34 ± 0.12 34.79 ± 0.25 35.86 ± 0.23 0.999 96.90
RSD 0.047 0.333 0.036 0.373 0.725 0.064
RSD, Relative standard deviation. Data in the parenthesis are the copy number of DNA.
Supplemetnal Table 2 Digital PCR results of the RBE4 and PEPC genes.
Sample Gene Positive Number Average
1 2 3 4
Huahui 1 RBE4 1142 1136 1104 1109 1122.75
PEPC 1276 1251 1249 1234 1252.5
Wan 21B RBE4 1006 1014 1036 1033 1022.25
PEPC 989 975 992 1005 990.25

Supplemetnal Table 2 Digital PCR results of the RBE4 and PEPC genes.

Sample Gene Positive Number Average
1 2 3 4
Huahui 1 RBE4 1142 1136 1104 1109 1122.75
PEPC 1276 1251 1249 1234 1252.5
Wan 21B RBE4 1006 1014 1036 1033 1022.25
PEPC 989 975 992 1005 990.25
Fig. 2. Schematic digital PCR results of the two rice samples. A, RBE4 PCR result of Huahui 1. B, PEPC result of Huahui 1. C, RBE4 PCR result of rice Wan 21B. D, PEPC result of Wan 21B.

Fig. 2. Schematic digital PCR results of the two rice samples. A, RBE4 PCR result of Huahui 1. B, PEPC result of Huahui 1. C, RBE4 PCR result of rice Wan 21B. D, PEPC result of Wan 21B.

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