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What Are We Fast-Tracking?Crop Trait Locus MarkerPeach Fruit flesh softening type
(melting, non-melting, non-softening) and
flesh adhesion to stone (freestone/clingstone). Also mealiness, firmness, flesh bleeding in storage
F-M locus on Prunus chromosome 4
SSR: endoPG-1 and SCAR: endoPG-6
Peach Fruit sweetness (SSC) and acidity (TA)
QTL on Prunus chromosome 4
SSR: BPPCT023
Apple Fruit acidity, crispness, and juiciness
Ma locus with QTLs on Malus chromosome 16
SSRs: CH05c06 and Hi04e04
Apple Fruit firmness QTL on Malus chromosome 1 SSR: Md-Exp7
Cherry Fruit size, firmness, and flavor
QTL on Prunus chromosome 2
SSRs: CPSCT038 and BPCT034
Cherry Fruit acidity QTL on Prunus chromosome 3
SSR: BPPCT039
PBA: crop-wide
PBA: breeding program
Breeding markersScr
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Mar
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Cross
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MA
B P
IPE
LIN
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MA
B P
IPE
LIN
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Promising targets
How Are We Fast-Tracking?
Efficient routine breeding operations
PBA: crop-wide
PBA: breeding program
Breeding markersScr
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serv
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Mar
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prior
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Cross
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sche
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Promising targets
How Are We Fast-Tracking?
1.
PRIORITIZATION. Many M-L-T assocs to choose from (e.g. RosBREED table).Made shortlist of ~6 each crop; current breeding priorities, apparent strength* Proxy for $ x G x H
PBA: crop-wide
PBA: breeding program
Breeding markersScr
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serv
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Mar
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prior
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Cross
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Promising targets
How Are We Fast-Tracking?
2. * Proxy for any future service breeders can access
GENETIC SCREENING EFFICIENCY. Nahla’s Corvallis lab designated as project’s Genotyping Center
3.
IMPROVED MARKERS. Tested known markers, all worked.* Normally will have
to access GDR to develop then test new mkrs at locus
PBA: crop-wide
PBA: breeding program
Breeding markersScr
eenin
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serv
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Mar
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prior
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Cross
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sche
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Promising targets
How Are We Fast-Tracking?
4.
VALIDATION. * Needs repres. segregating germplasm, phenotypes for traits of interest, genotypes for specific trait locus markers. We are using CR Sets,
Yr 1 phenotypic data, mkrs of previous slides
Currently collating that data
Then analysis - PBA
Genotyping:Nahla & April, Ksenija & Terrence
Phenotyping:All crop teams
Germplasm…
Data quality control…
PBA: crop-wide
PBA: breeding program
Breeding markersScr
eenin
g
serv
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Mar
ker
prior
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Cross
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sche
me
Promising targets
How Are We Fast-Tracking?
5.
UTILITY. As for Validation but ensure use breeding program germplasm
Output = functional genotypes of imp. breeding parents
PBA: crop-wide
PBA: breeding program
Breeding markersScr
eenin
g
serv
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Mar
ker
prior
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Cross
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sche
me
Promising targets
How Are We Fast-Tracking?
6.
MAPS (CROSS PLANNING). Functional genotypes simply used to inform crossing.Avoid inferior crossesTarget superior crosses