This document appears to be a list of genes or genetic markers from the Medicago truncatula genome arranged in order with their physical position on chromosomes indicated in the left column. There are over 500 entries included in the list with various identifiers like "cp", "OG", "CaM", and others potentially representing different genes or markers. The document provides a dense listing of genetic data from M. truncatula but does not include any additional context or explanation.
3. - Assembly of genomics and germplasm
resources
- Development of comparative maps and
framework genetic markers for target
crops
- Assignment of genes and pathways to
phenotypes
- Validation of genes and pathways
Four objectives
4. Large-scale molecular markers including SSR, SNP
and DArT markers for less-studied crops
Genetic maps with moderate marker density available
Cost-effective SNP genotyping platform i.e.
GoldenGate assays, KASPar assays for a number of
crops
Transcriptomic resources for chickpea, pigeonpea,
sweetpotato, cowpea, cassava
Physical maps for cassava, cowpea
Mutant collections in common bean, potatoes
Utilization of mutant collections in rice for function
analysis
Progress updates- i
5. Cloning of AltSB (SbMATE1) and Pup1 in sorghum and
rice and diagnostic markers
Molecular markers associated with traits of interest to
breeders in cowpea, chickpea
Gene expression analysis for drought tolerance in rice
Bioinformatic tools for comparative genomics
analysis
Gene expression analysis for selected transcription
factors in wheat for drought tolerance
Allele discovery for drought tolerance in sorghum and
rice
Bioinformatic tools for gene expression analysis
ISMU pipeline for analysis of NGS data…
Progress updates- ii
6. Comparative Genomics Challenge Initiative
(PDC: Leon Kochian USDA/ARS & Cornell Uni)
• This CI takes advantage of previous GCP projects
where two genes AltSB (SbMATE1) and Pup1 have
either already been cloned.
Rice PUP1 Sorghum AltSB
Clone
homologs
Clone
homologs
Maize Sorghum Maize Rice
Verify role in
P efficiency
Verify role in Al
tolerance
P Efficient
Maize
P Efficient
Sorghum
Products for breeding programs
in developing countries
Al Tolerant
Maize
Al Tolerant
Rice
Products for breeding programs
in developing countries
Pyramid P Eff & Al Tol
7. • Rice:
QTL mapping and GWAS for Al-tolerance (G7009.07, Susan McCouch);
cloning and characterization of Pup1 and dissemination of breeding
linesto NARS partners (G7010.03.04, Sigrid Heuer)
• Maize:
Cloning and characterization of Al-tolerance
(G7010.03.02, Claudia Guimaraes);
Cloning and characterization of Pup1 (G7010.03.01, Leon Kochian);
breeding for Al-tolerance and P-efficiency (G7010.03.05, Sam Gudu)
• Sorghum:
Cloning and characterization of P-efficiency
(G7009.03, Jura Magalhaes)
breeding for Al-tolerance and P-efficiency (G7010.03.03, Eva
Weltzein)
Comparative genomics RI
8. • Pup1 major tolerance gene is a constitutive enhancer of root growth
• Acts upstream of genes with key function in root growth and stress response
• Final set of Pup1 gene/allele specific markers available
• Development of Pup1-breeding lines by MABC completed
• First field data confirm beneficial effect of Pup1
• Seed increase ongoing at IRRI and ICABIOGRAD
• Mapping of Al-tolerance in rice is underway
Sigrid Heuer, IRRI
9. Genotyping and Phenotyping of
Sorghum Association Panel
• Initially genotyped with Illumina 1536 SNP chip by M Hamblin
• Currently being genotyped by sequencing by Ed Buckler and
Sharon Mitchell as part of their NSF BREAD grant .
-Developed multiplexing approach to sequence multiple
samples in one lane of Illumina High-Seq.
- Developed a bioinformatics pipeline for SNP ID
- Hope to add 100,000 to 200,000 SNPs to each member of
association panel.
• Have phenotyped entire panel for Al tolerance – waiting for
genotyping to be completed to conduct GWAS on Al tolerance.
• Have phenotyped the IGD part of the panel (converted lines) for
P efficiency at Embrapa.
•Will soon phenotype panel for P efficiency and root architecture in
low P soils in greenhosse at Cornell
Leon Kochian, USDA/ARS & Cornell Uni
10. GWAS of Rice 3D Root Architecture Traits
• Have completed phenotyping rice for 3-D RSA traits under
control conditions in gel-based media. Phenotyped the
McCouch’s NSF-TV rice diversity panel (500 lines) and also
bi-parental mapping population (168 lines).
• That involved phenotyping approximately 2000 individual
plants in gellan gum cylinders.
• Roots imaged at 3, 6, 9, & 12 days after
planting to include dynamic
growth parameters.
• Randy is in Taiwan for the summer
where he as nearly completes 3D
reconstructions and quantification
of his 20 RSA traits.
• GWAS analysis will be completed
in Fall with 950k SNP chip.
Leon Kochian, USDA/ARS & Cornell Uni
11. Breeding value of AltSB
0.00
1.00
2.00
3.00
Control (-Al) TT tt
Yield(tons/ha)Allelic substitution effect:
100 RILs BR007 x SC283
r=0.28 (P=0.0047):
nutrient sol. vs. field
Drought x Al
tt TT 0.5 - 1 ton/ha
Chr 3
Map position (cM)
-log10(p)
0 50 100 150 200 250
024681012
Gy
Gy_flo
Rnrg
Alt
SB
• Background SNP markers
• Association pipeline for Al
tolerance
• Assessment of AltSB on
acid soils (grain yield
advantage)
Jura Magalhaes, EMBRAPA
12. Establish network for genomics community for
enhanced discussions in the area of
development and application of genomic tools
Develop user friendly portal that will present
information on tools, resources developed by
GCP or available in public domain to offer one-
stop shop solution to the breeding community
Broker-access to economically priced
genotyping and sequencing services
Agricultural Genomics Network
(AGN)
13. Consensus:
AGN is a GREAT initiative, it would encourage new
breeders also to have access and provide all help to
implement molecular breeding.
AGN will keep the existing GCP community vibrant and
active in post-GCP era!
Markers of choice for breeding applications:
SNPs (also SSRs in some cases!)
Genotyping through outsourcing is preferred and
accepted solution by NARS breeders
Discussions on AGN
14. Suggestions:
A broader survey about requirements of tools,
resources on portals may be conducted
Some basic information about molecular breeding
together with tutorials may be kept on portal
Helpdesk to respond on genomics related questions in
time is URGENTLY required.
Portal can be in wiki style
Sustainability is an important issue in post-GCP era.
Discussions on AGN
15. Comparative genomics
vs
species specific genomics research
Excellent for understanding the genome
evolution, gene function and trait mechanism
Applied aspects- few examples?
Cloning of one gene in one species- how useful
this is for the other species? Pup1 and Al-
tolerance in cereals?
Development of diploid genome physical map
for applications in 4x groundnuts?
Species specific genomic resource
development is no more an expensive and time
consuming task?
16. Challenges/ Opportunities
Data management and sharing (continuous discussions
Analysis of large scale datasets especially NGS data
(working with international players/Theme 3)
Outsourcing vs. in-house work to generate data in cost-
effective and timely fashion (BGI collaboration)
Conversion of genomics research platform in breeding
application platforms (KASar assays in collaboration
with Theme 2/ IBP)
Capacity building – an important component of
Genomics Integrated Breeding Services
17. Utilization of developed genomic resources
Assemble large scale informative SNPs for breeding
applications
Accelerated activities of Comparative Genomics CI
towards identifying diagnostic markers for Al-tolerance
and P-uptake in targeted cereals
Publication of large scale datasets
Engage CGIAR community by implementing AGN under
GIBS
Perspectives
Thank you !