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Searching for Genes Important in Seed Development
At1g19000
At1g74840
BY: Mike Douglas
![Page 2: Searching for Genes Important in Seed Development At1g19000 At1g74840 BY: Mike Douglas](https://reader035.vdocument.in/reader035/viewer/2022070606/5a4d1b567f8b9ab0599a9a69/html5/thumbnails/2.jpg)
MYB-Related
Transcription Factor
At1g19000(GENE MODEL)
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Genotyping
Expected Wild Type Band:
1104 bpT-DNA Mutant Band:
1076 bpT-DNA Mutant Band
325 bp
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Plant Layout Chart & Genotyping Results
15 : 13 : 3Homozygous Wild-Type : Heterozygous : Homozygous Mutant
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Where is AT1g19000 Expressed?
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Cloning of Promoter Region in E. Coli Plasmid Vector
ECO-RI Digestion
1 kb
Lad
der
(+) C
olon
y
Col
ony
I
Col
ony
II
Col
ony
III
Col
ony
IV
(+)
(-)1617
1287
3500
Sequence using T7 and
SP6 PrimersBlast: T7 Sequencing vs. Actual Promoter Sequence Identities = 637/637 (100%)
T7 Sequencing
Blast: SP6 Sequencing vs. Actual Promoter Sequence Identities = 708/709 (99%)
1 MUTATION
SP6 Sequencing
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Mutant Phenotypes• No Obvious Physical Phenotype• Nomarski Imaging
WILD TYPE EMBRYOS
HOMOZYGOUS MUTANT EMBRYOS
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At1g74840(GENE MODEL)
MYB-Related
Transcription Factor
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Genotyping1
kb la
dder
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 WIL
D T
YP
E
(+)
(-)
1 kb
Lad
der
(-)
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Plant Layout Chart & Genotyping Results
ALL 18 Plants are WILD TYPE
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Where is AT1g74840 Expressed?
Expected RT-PCR product: 603 bp
Ladd
er
Leaf
+R
T
Sili
que
+RT
gDN
A
TA L
eaf +
RT
TA S
eed
+RT
H20
Ladd
er
NOTE: No Tubulin Band
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Cloning of Promoter Region in E. Coli Plasmid Vector
ECORI Digestion
T7 and SP6 Sequencing
Blast: T7 Sequencing vs. Actual Promoter Sequence Identities = 719/722 (99%) Plus/Plus
Blast: SP6 Sequencing vs. Actual Promoter Sequence Identities = 705/706 (99%) Plus/Minus
4 MUTATIONS
Col
ony
I
Col
ony
II
Col
ony
III
1 kb
Lad
der
1888
3500
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Phylogenic Relationship of At1g19000 and At1g74840
Cross to make DOUBLE MUTANT- may eliminate possible redundancy for mutant phenotype