M U 1
CHNG 1- TNG QUAN 3
1.1. GII THIU CHUNG V VIRUS H 3
1.2. BDV 5
1.2.1. B 5
ng Nam 11
N GEN P10 15
N SRBSDV 17
1. NG DNG THC TIN 18
1.5.1. Gii thiu chung v 18
1.5.2. Mt s ng dng ch 21
CHNG 2- VT LI 24
2.1. VT LIT 24
2.1.1. Vt lim 24
t 24
2.1.3. Thit b 25
2.2. PHU 25
c hiu bng k thut PCR 25
n gel agarose 26
i DNA bng enzyme DNA ligase 26
2.2.4. Bin np vi khun E. coli 27
t DNA plasmid t t n 27
2.2.6. Tinh sch DNA t gel agarose 28
2.n phm PCR 29
2.2.8. Phn ng ct DNA bng enzyme ct gii hn 29
2.2.9. Gi n DNA 30
a SDS 31
y E. coli n b dch chit t 32
2.2.12. Tinh s hp qua ct Ni
2+
agarose 32
nh lng protein b hp th
ngoi (A
280
) 33
t bch 33
2.2.15. Phn dch (Western blotting) 33
2.2.16. Tinh s IgG bng ct s-sepharose 34
2.2.17. Ph 35
2.2.18. Ph 36
N GEN P10 T cDNA CN S10 . 37
3.1.1. n gen P10 bng phn ng PCR 37
n gen P10 39
3.1.3. PCR kim tra s t ca pl hp 40
3.1.4. Ki hn gen P10 41
3.1.5. Gi n gen P10 ca chng SRBSDV 44
3.2. BIU HI HP P10 45
3.2.1. Thit k vector biu hin gen P10 45
3.2.2. Biu hi hp P10 52
3.3. G 58
ng min dt bch 58
N VIRUS SRBSDV B TINH SCH 63
nhy c 63
n SRBSDV bt ELISA 64
KT LUN NGH 66
U THAM KHO 67
PH LC i
i li cc ti PGS.TS. Phi
TS. Phan Tu nhi th bng dn,
c t
, anh ch em trong B nh
hc P Thc vt, Vin Di truyng d
t nhiu trong thi gian i B
i li c c Khoa Sinh hc,
i hc Khoa hc T nc bi
c vng kin th
thi gian hc tp tng.
Cu i li cng
u kin tt nh lun
03
H
Bng 1p oligonucleotide s du
Bng 2n phn
Bng 3n phn ng ghn phT
4:
nhn bi
5: -PAGE 12 %
Bng 6n phn
P10
Bng 7n phn ng ct gii hn pGEMT/P10
Bng 8n phn ng ct gii hn pGEMT/P10 28a
Bng 9n phn ng ct gii hn pET28a/P10
Bng 10u kin cm ng biu hi hp
Bng 11: Kt qu
492
th c hiu c bng phn ng ELISA
Bng 12: Kt qu
492
ca phn u ry.
Triu chng c nhim b
Rng Sogatella furcifera truyn SRBSDV
=13 Fijivirus
4: Tinh th virus SRBSDV n bn
t b bnh ti Vi
5in di sn ph
P10
H6 i hn
7: Bin n h
P10 E. coli
8:
9: PCR kim tra khun lc v
P10
10: in di sn phm ct gii h hp pGEMT/P10
11:
BamHI/XhoI
2 vector pET28
P10
13: Bin n h
P10 E. coli DH5
14: in di sn phm PCR t n lc vi cp mi T7-Fw/T7-Rv
15: in di sn phm PCR kim tra plasmid pET28a/P10
16: in di sn phm ct gii h hp pET28a/P10
17: Bin np vector pET28a/P10 n E. coli Rossetta
18n di SDS-PAGE kim tra s t ca protein P10 hp trong
u kin chun
: Kim tra s t ca protein P10 hu ki
v nhi i gian
20: in di sn phm sau tinh sch dch chit t
21: King min dch ct thanh bng thn dch
22: S huyt thanh chu n dch qua ct protein A-
sepharose
23n di SDS- PAGE ki tinh sch c
24: PWestern blotting s d tinh sch (1:2000)
25: Th nhy c tinh sch
26: Th c hiu c tinh sch (1:5000)
BNG U
APS Ammonium persulphate
bp C
CBB Coomassie Brillant Blue
cDNA DNA b sung
dNTPs Deoxy triphosphates nucleotides
dsRNA
E. coli Escherichia coli
EDTA Ethylenediamine tetraacetic acid
ELISA K thu hp th min dt vi enzyme
(Enzyme- linked immunosorbent assay)
EtBr Ethidium Bromide
IPTG Isopropyl--D-Thiogalactopyranoside
kb Kilobase
kDa Kilodalton
LB ng Luria Bertani
ORF c m (open reading frame)
PCR Phn ng chui polymerase (polymerase chain reaction)
SDS-PAGE Sodium dodecyl sulfate polyacrylamide
SRBSDV
strike
dwarf virus)
TAE Tris base Acetic - EDTA
TBE Tris base Axit Boric EDTA
TEMED N,N,N'N'-Tetramethyl-Ethylenediamine
1
(Oryza sativa L.) c i nh
cc quan trng cung cp nguc cho khong th gii. c
ta c ch lc n vi p
ca khong 80% s h . Trong nhng
i mt vi nhic, nh
hc bidch bnh x n sn
xuo. m v u, Vi ng di
chuyn ca nhiu lon dch; dnh virus
din bin rt phc tp, t hi ln.
ti Ngh An, b
i dim bn 3.510 ha b mt trng.
i ti 28 tnh min Bi
tng dim bi 24.000 ha. B,
nh l c
Southern rice black strike dwarf virus - t
i c Fijivirus 2, thuc h Reoviridae. H gen
n RNA sc t
1,8 t
n S10 d
n RNA s
c nh nht protein v
bo th c chu nh
virus trong chi Fijivirus.
Vic ch nhim SRBSDV hic thc hin bng
-PCR nhn RNA sa virus
mu bi k thu
ng thn tin cho vic tiu king rung. Vic
nh mt nhiu thn t
2
trong vich bt hi nhiu hecta sng
y, vic s
n nay.
Vi m
P10
,
c hi
P10 ca virus
Vit
Namnhm phc v
.
3
-
1.1. GII THIU CHUNG V VIRUS H
t trong nhnh nguy him nh
gim snp, dn sp
ng mc bit trong bi cnh thay
do vi thuc
n bin ph i c
b c tt.
Trong sn xup khoi cho thc
v khong 16 loi virus
ph lc 1). Trong s , Rice hoja blanca virus
(m ti Nam M), Rice giallume virus (m
b t Rice stripe necrosis virus (m t
n thy tc tr, ch
i nghim tr binh
), bnh Tungro, bm thi
[7, 11-13, 16].
Ngh tr Vii mt vt dch bnh
virus din bin rt phc tp. Trong khi d
n mit nh min B
phi mt vi dch SRBSDVy, ng u bnh virus h
n hin nay cn ph kt hi
i ng t o sn xu
hinh t hiu qu.
nh bn cht h gen, mc
ng di truy t bi
chng
mn t hiu qu nh d
4
ngh u v virus Vit Nam hin mi tp trung n
b nh, dii truyn
bnh, trng gi,
n
bich bnh virus rt phc tn vi
u khoa h
gii trong vic
ng b , p m
ng virus h Vit Nam. Mt s
n Bo v thc vi hi
t thanh, RT-n
xut thann t k p
mc hi (Rice grassy stunt virus-Rice
ragged stunt virus-Rice black streaked dwarf virus-RBSDV),
c (Rice stripe virus-RSV), tungro (Rice tungro spherical virus-RTS
s Nam (Southern rice black strike dwarf virus-
u v quan h gin i ri ry
(r i truyn
bnh virus h n ti Vin
Bo v thc vu v virus ha ti Vin Di truy
ngh Sinh hc li tp trung gen, to
ging chng chu virus bng c RNAi. Hin Vin Di
truy gen cn
bo th c
p v gen ct k
t hoc mt s n gen.
G t h u v p
Quc gia Nht Bn, Vin Di truyn xuc 7 b kit ch loi virus
t thanh bao g
xo c (RSV), tungro (Rice tungro
spherical virus-RTSV), tungro (Rice tungro bacilliform virus RTBV), b
5
(Rice dwarf virus- Rice gall dwarf virus-RGDV) vi s
cho hu n b u virus
h Vit Nam trong th
c vi din bin phc tp ca dch virus hic biSRBSDV
vu v virus hn pht c, t
gii quyt tn g
u v bn ch, din bi
d thu u hin gen, bt hot bin.
1.2. B SRBSDV
1.2.1. B
1.2.1.1. Tình hình bệnh trên thế giới
B (Rice black streaked dwarf
virus-RBSDV) n l Nht B
[27]. RBSDV c ghi nhch c Nht Bn, Trung
Qut dch b Nht bc ghi nh
nh 1961, r 1967. Trung
Quc dch bnh
i mch. T l bnh RBSDV 1976 [22].
n ca bnh k ng ch
xut hin cc b i t l nhim thp c c. Tt khu vc
b bRBSDV
t s c Nht Bn,
virus ch i t mt
c ca Tohoku, RBSDV i c i
t l nhim thp [18].
Ti Nht Bn, u n i quan h cht ch gia
s l nhim bnh vi s nh cdi
s l nhim bnh gim m
6
st gi i mch. Trung Quc,
s ch nh gia tt bi
di[33] st gi t l bnh li
gi di t di Nht bn
n nhau. Tuy
ng ghi nhn v s dch chuyn qua li ca ry
i L. striatellus, gia Nam Trung Qut Bn [19].
1.2.1.2. Tình hình bệnh ở Việt Nam
8/2009, ,
(
)
5.506 ha,
gn 3.510 ha b mt trng.
,
,
,
,
.
.
(TH3-3, Nh
Bio 404, B ) (
p Vit Nam (NNVN), 7/9/2009).
9,
,
(, 14/9/2009).
i cuc h
(NN&PTNT) 23/9/2009 cho bit t -19/9, Cc Bo v thc vt
y mu ti mt s tnh min Bc. n 5 tn
m b A
v m bnh,
8.000 ha b bnh rt n
kh t trng (, 24/9/2009).
i Ngh An,
li
, n NN &PTNT
B
T.S. Rogelio-
7
(IRRI)
.
,
2
.
8/9/2009 B NN&
31 (: 31/-BNN-
BVTV)
.
, 23/9/2009,
&
.
,
p
2 virus
(24/9/09).
10 2009,
o v thc vt,
o v thc vt,
i hp . Kt qu
c
i Ngh
Bc trong v SRBSDV.
nh, B p ban ch ng dch do th ng
ng ban ch o.
Trong v a Cc Bo v thc vti
nh i ti 28 ti tng di nhim
ti nh b nhim bnh bao gm:
+ Bc B: 20 tc Giang, Bc Kn, Bi
nh, Ninh
, Qung Ninh, ,
+ Bc Trung B: 5 t An, Qung Tr, Qu
Th).
8
+
: 3 tnh (Qung Nam, Qu
Trong v a Cc Bo v thc vt
nh vi ti 28 tng di
nhi u v i nh t
ph ha. t hin bm:
+ Bc B (19 tnh): Bc K
La, Bc Giang, H c Ninh, Hi
nh, Qu
+ Bc Trung B (6 tnh): Ngh An, Th, Qung
Tr
i Nam Trung B (3 tnh): Qung Nam, Qung.
T 2013, bnh d u hiu tm lng, ch t hin
cc b mt s tha ruch v
tim a sng thu hoo cnh
min Bn Trung.
1.2.1.3. Đặc điểm triệu chứng bệnh lúa lùn sọc đen
Biu hin bnh cm SRBSDV rt ging vi biu hin ca bnh
u chng cm bnh bao g
i th c
binhy d m
ho t tri c v s
c cch dn nh,
ng. T bng ny
chc nhiu r b t hin nhiu u
t d nhn tht nh bnh
n c hoc tr ng b
9
n, trt, g
(R , sc phin, sc b, sc than, pht)
: Triu ch nhim b
1.2.1.4. Vector truyền bệnh
n SRBSDV rng (Sogatella furcifera). C ry
n bnh. R
y b b truyn khi cht.
Mu v c lan truyn b c ti
10
c thc hi3
(Sogatella furcifera), (Nilaparavata lugens)
(Laodelphax striatellus).
(100 %
3 - 4 /). ,
.
.
2: Rng Sogatella furcifera truyn virus SRBSDV
M u v n SRBSDV ca r ng
Sogatella furcifera c Trung Quc thc hin nhnh
n ca bnh hiu
qu nht. B-c s
mt ca SRBSDV trong tt c a S. furcifera,
bao g n n. S. furcifera
nhim SRBSDV s
l n trng. M ry S.
furcifera m cho 48-
87-i gian ti thi rng truyn virus cho
--n
ca ry. Kt qu ng t n d b
nhim SRBSDV t rng nht.
Rn
R
11
nh lng vc, c
ph ca rn ch
rng truy
bnh tn t rng sng qua
c di chuyn r t s
c v tip theo.
1.2.2. Virus
1.2.2.1. Tình hình nghiên cứu virus gây bệnh lúa LSĐ ở Việt Nam
bit ln nht gic vc v
SRBSDV
. Thc t u h gen ca
ta hin nay ch dng li vic d bo th ca SRBSDV Trung Quc
thit k p mi nhn bo th khong 1 kb r
u gi h gen, v ng di truy
ng mi; u t chn
o ging chng bnh virus b
cu v SRBSDV ci
hn Bo v thc v
trng v
ii h
Ni)
2 (
Bo v thc vt)
(60
).
-
2 viru
/n .
tra ELISA,
(
, ,
):
12
+
.
RRSV.
+
. .
,
,
.
,
,
(Reoviridae) .
2
.
,
2
10
ch 2 virus
.
tra RT-
,
,
-
(RRSV).
-
, Nam
,
.
h
4
u hin vi
n t n th
bnh.
,
[23, 24, 30, 34].
c thc hin
ti Vin Bo v thc vu Vin Bo v thc vt
ch vi nh d
k thut RT-PCR, gi sn phu hin t.
m triu chng b
c tiu th n t, kt qu o nhm khng
13
sn ph
S3 ca h u Vin Bo v thc v
u lan truyn thc hin ti Vin Bo v thc v
i truyn bng giu c
Trung Quc.
D NN & PTNT thng nht gi lnh ti
Vi
(SRBSDV).
1.2.2.2. Đặc điểm sinh học của SRBSDV
T t bt hiO. sativa) ti mt
s c tnh Qum
bnh thm, mt hit sn nh.
nh ch t bin chng ca RBSDV. Gn
t qu u v i truyn bnh, cn cht
h c Trung Qut lu
mt chng virus mi vi SRBSDV. Kt lu khoa
h
+ Virus mi truyn bng mc
m quan trFijivirus.
+ H u th i
n t.
+ T gen ca hai bin chng (Qu
m cho th
axit amin ca hai bin ch n so vi
s n chng cFijivirus
nm trong khong vi nhau. Mng
i gi Rice black streaked dwarf virus (RBSDV), Maize
14
rough dwarf virus Mal de Rio Cuarto virus (MRCV)
Fijivirus-2 cFijivirus, so v
mi thuc p Fijivius,
h Reoviridae.
+ ViSRBSDV ng v triu chng b
m, song RBSDV tp trung ch yu u trong khi virus mi
ch mi ghi nhn ng thi truyn bnh
rn din c trong khi ry
li ph bi c Trung Quc [14, 16, 17].
Mu v c lan truyc ti
3 (S. furcifera),
(N. lugens) (L. striatellus).
(100%
3 4 /). ,
.
. SRBSDV
nh 3
(Echinochloa crusgalli), (Pennisetum flaccidum) Juncellus serotinus
t trong hoc xung quanh runm bnh [6, 8, 17].
i c Fijivirus-2, thu
Reoviridae. H gen n RNA s
c t t t n S10 d
tn RNA st
polypeptide (chng
a mt
protein v ng
a mng
n pI
15
(Isoelectrics point) u a m
t axit amin 608 ng 22 25% vi
a mt
) trng
24 kDa ch
n t ln nht v nucleotide so v
trong p Fijivirus- ng so v
ng so vu
a mu
1.044
630
ng
a m 1.674
ng
[16, 17]. M
gi h p tnh Hi Nam Trung Qut qu
nucleotide c ng 98-99% so vi
chng Qu 17 h ng SRBSDV
Qu
cFijivirus-2, hai ch ng m axit
-78% so vi RBSDV, 65% so v i Fiji disease
virus (FDV) [16y, t khi d
n
cui Trung Qu nucleotide ca h gen RBSDV
1.3. N GEN P10 SRBSDV
i cFijivirus-2, thu
Reoviridae. H gen n RNA s
16
c t t t n S10 d
n RNA si [14n S10 , u
1.797 bp, 35,6%,
80%
Fijivirus 2 [29].
cha m1.674 nucleotide, cho 557 axit amin,
84,3% 83,5%
.
, u
rus.
Protein P10 62,6 kDa,
8 do
Fijivirus
ddii xng icosahedral [37]. ~ 70 nm,
mt v n gnh c
T=13 [7, 38].
3:
v
=13 ca chi Fijivirus [38]
Protein P10
,
. Kt qu s
P10
y
,
, trong khi
550
.
17
(codon ATT), methionine (codon ATG)
valine (codon GTT).
P10 t
[30].
4 : Tinh th
ti Vi7].
1.4. N SRBSDV
Vin bnh khi gieo tr
bu hit bnh
do RBSDV rc hin b hai bnh
m v triu chng b n nay,
.
,
(RT-
).
ng s (2006) [32]
u qu khi cn ch t cnh . Tuy
(08)
m a, theo