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Molecular Breeding for Improved Berry Quality in Ribes, Rubus and Vaccinium
Rex Brennan
Fruit Breeding Group
Vaccinium & Other Superfruits Symposium Maastricht, June 2012
Fruit Breeding at JHI
Commercially-funded breeding
programmes
Raspberry, blackberry
Blackcurrant
New techniques for selecting the
plants we need
Marker–assisted breeding strategies
Faster and more specific cultivar development
Breeding techniques Expensive to run breeding programmes:
Lengthy timescales
Some traits take a long time to screen for, others are impossible to screen on a high-throughput basis
Field/glasshouse costs
Timescales need to be reduced and efficiency needs to be increased
Time to cv. currently 12-15 years
Extensive phenotyping in field, glasshouse and CE rooms
Establish link between genotype and phenotype
Molecular Breeding Faster identification of genetically superior individuals in breeding
populations
Can be utilised in situations where:
Assessment in field takes a long time
Pest resistance (some)
Assessment can only be done on mature plants over time
Fruit quality
Basic research development costs relatively high, deployment costs
low
No environmental effects
Must be associated with detailed phenotyping
Existing markers in Rubus and Ribes Markers linked to pest/disease resistances
Phytophthora root rot (raspberry)
Cecidophyopsis gall mite (blackcurrant)
SSR marker (root rot)
PCR-based marker (gall mite)
Time saved compared to field infestation plots (ca. 4 years) for screening of new lines from breeding programme
Markers now routinely deployed in JHI breeding programmes as a selection tool
Brennan et al., 2009. TAG 118: 205-212Graham et al., 2011. TAG 123: 585-601
Blackcurrant Breeding Objectives
Fruit quality
High Brix/acid ratio
Low total acidity
Anthocyanins
Delphinidins preferentially selected
Vitamin C (AsA)
> 140 mg/100 ml
Sensory traits
Berry size
1 g minimum
Fresh market – 2 g minimum
Agronomic
Environmental resilience
Winter chill levels
< 2000 h/7.2oC
Pest resistance for low-input
growing
Acceptable crop yield
> 6 t/ha
Juice yield also quantified
Trait associations – Ribes fruit quality I
Measurements across reference 9328 mapping
population (ca. 300 plants) for 4 years at JHI
SNP-based linkage map developed using
transcriptome-based 2GS 454 sequencing
Individual traits placed on genetic linkage map
Fruit size
Anthocyanins
Associated molecular markers identified for
validation in other germplasm
CL1028Contig1_5220.0
CL609Contig2_26587.3CL2096Contig1_42914.3CL1694Contig2_35316.2CL1830Contig1_45621.4CL1323Contig1_64926.7CL222Contig2_43229.9g1_K0438.7CL79Contig5_33739.4g2_P03a40.4g1_O1741.6CL181Contig3_11642.2CL1Contig17_183444.0g2_P03b44.7CL105Contig1_120245.5e1_O2047.2gr2_J05_18348.0g2_P1748.1CL124Contig2_89849.4CL1199Contig1_69951.0CL1Contig181_88051.5CL1463Contig2_25651.9g2_D0552.5CL2643Contig1_46854.2g1_P0554.9CL1484Contig1_38255.5g1_M0757.7CL1092Contig1_97176.0CL177Contig2_44576.8CL1060Contig1_48881.3CL139Contig3_84693.3
CL175C
ontig
2_839,
83%
CL2516C
ontig
1_469,
98%
CL495C
ontig
3_954,
89%
CL1913C
ontig
1_419,
57%
CL1636C
ontig
1_1112,
66%
CL115C
ontig
4_555,
78%
CL186C
ontig
2_1502,
84%
CL1247C
ontig
1_287,
73%
SCRI9328 LG1
CL609Contig2_2658 0.0CL2096Contig1_429 2.4CL1694Contig2_353 5.1
CL1830Contig1_456 16.6
CL1323Contig1_649 22.3
CL222Contig2_432 28.1
CL1Contig17_1834 38.4CL105Contig1_1202 39.1
CL1Contig181_880 43.5CL1199Contig1_699 45.9
CL1092Contig1_971 55.7CL177Contig2_445 59.1
CL1247Contig1_287 60.0
CL1060Contig1_488 65.9
CL139Contig3_846 79.2
CL2516C
ontig
1_469, 9
9%
CL186C
ontig
2_1502, 7
0%
CL124C
ontig
2_898, 9
8%
MP7 LG1
Russell et al., BMC Plant Biology 2011, 11:147
Blackcurrant berry weight
CL1028Contig1_5220.0
CL609Contig2_26587.3CL2096Contig1_42914.3CL1694Contig2_35316.2CL1830Contig1_45621.4CL1323Contig1_64926.7CL222Contig2_43229.9g1_K0438.7CL79Contig5_33739.4g2_P03a40.4g1_O1741.6CL181Contig3_11642.2CL1Contig17_183444.0g2_P03b44.7CL105Contig1_120245.5e1_O2047.2gr2_J05_18348.0g2_P1748.1CL124Contig2_89849.4CL1199Contig1_69951.0CL1Contig181_88051.5CL1463Contig2_25651.9g2_D0552.5CL2643Contig1_46854.2g1_P0554.9CL1484Contig1_38255.5g1_M0757.7CL1092Contig1_97176.0CL177Contig2_44576.8CL1060Contig1_48881.3CL139Contig3_84693.3
0
5
10
15
SCRI9328 LG1
HBW_08
HBW_09
HBW_10
Smaller effects on LG4 and LG5, but less consistent
Blackcurrant – Ascorbic acid
CL1028Contig1_5220.0
CL609Contig2_26587.3CL2096Contig1_42914.3CL1694Contig2_35316.2CL1830Contig1_45621.4CL1323Contig1_64926.7CL222Contig2_43229.9g1_K0438.7CL79Contig5_33739.4g2_P03a40.4g1_O1741.6CL181Contig3_11642.2CL1Contig17_183444.0g2_P03b44.7CL105Contig1_120245.5e1_O2047.2gr2_J05_18348.0g2_P1748.1CL124Contig2_89849.4CL1199Contig1_69951.0CL1Contig181_88051.5CL1463Contig2_25651.9g2_D0552.5CL2643Contig1_46854.2g1_P0554.9CL1484Contig1_38255.5g1_M0757.7CL1092Contig1_97176.0CL177Contig2_44576.8CL1060Contig1_48881.3CL139Contig3_84693.3
0
2
4
6
8
10
SCRI9328 LG1
e3_B020.0CL2142Contig1_4259.2CL917Contig1_21320.5CL1Contig926_233 CL1Contig385_91425.4CL1Contig323_123 CL121Contig2_310g2_N20
26.3
CL152Contig3_156526.4CL1Contig968_64 CL1Contig525_204CL125Contig2_1119
26.5
CL1Contig279_332 CL1243Contig1_47626.9CL1Contig16_44227.3CL158Contig3_103427.4CL1121contig1ssr CL1Contig872_24328.6CL351Contig1_63330.0g1_H0930.6g1_L1232.1g1_A0132.5CL662Contig1_69139.1CL168Contig1_153943.2CL199Contig1_79645.2CL1Contig727_45845.4g1_O0246.8CL17Contig1_54547.3CL1464Contig1_81749.9CL4457contig1ssr52.0CL10Contig3_792 CL754Contig1_75858.3CL103Contig5_49158.7
CL2036Contig1_67385.4
0
2
4
6
8
10
SCRI9328 LG5
Ascorbate_08
Ascorbate_09
Ascorbate_08
Ascorbate_09
Blackcurrant total anthocyanins
e4_D030.0CL1397Contig1_47510.8CL2859Contig1_446 CL1Contig889_53423.4CL1259Contig1_11726.8CL1097Contig1_79127.7CL234Contig1_60834.5CL176Contig1_23039.5CL951Contig1_19044.1CL61Contig1_237246.6CL2001Contig1_30448.1CL192Contig3_48048.2CL1343Contig1_57448.9CL1167Contig2_549 CL135Contig1_992CL193Contig1_501 CL1212Contig1_1333CL1033Contig2_690 CL196Contig1_344CL657Contig2_887 CL1061Contig1_121CL1590Contig1_819 CL1Contig109_936CL126Contig2_235 CL1057Contig1_870CL6584contig1ssr
49.3
CL1278Contig2_825 CL1653Contig1_40249.7CL836Contig1_101750.0g2_B2050.3g2_M19_30350.7CL227Contig2_1171 CL1Contig931_1929CL1Contig285_845
50.9
CL1529Contig1_61551.5g2_M19_29351.8e3_M04a54.3CL138Contig1_37156.2CL830Contig1_10060.4CL1488Contig1_19662.3CL1Contig714_20196.0CL1974Contig1_21197.0CL1Contig973_658102.7CL1Contig291_268104.9
0
2
4
6
SCRI9328 LG3
Anthocyanin_08
Anthocyanin_09
Also major QTLs for citrate in this area. Also anthocyanin (pomace) in both years, and Brix
Trait associations – Ribes fruit quality II
Use of gene expression data from ripening
fruit linked to metabolomic analyses
Fruit quality analysed at various stages
Gene expression monitored across stages
using Agilent microarrays
Key genes mapped, markers identified for the
various quality and nutritional traits
Environmental influences on gene expression
Reduction of seedling numbers using marker-assisted breeding - Ribes
Marker for gall mite resistance2012
Marker for berry size Est. 2013
Markers for anthocyanins, sugars, vitamin CEst. 2015
Reduced seedling numbers –but increased relevance to industry needs
Faster field selections and cv. releases
Raspberry quality traits
Commercial traits assessed across seasons and environments:
Ripening
Cropping season
Colour
pH
Anthocyanins
Berry size
Sensory traits
Brix
Volatiles
Raspberry ketone
Experimental outline
Glen Moy x Latham reference mapping population
3 seasons and 3 environments
Assessments of trait of interest
QTL mapping
Candidate gene analysis
Microarray to examine changes in gene expression during
fruit development
Ripening QTLs for the ripening stages were identified across four chromosomes
2, 3, 5 and 6.
Each of the groups had markers that had a significant effect at various ripening stages.
The work identified genetic markers associated with early or late bud break and short or long ripening periods.
ERubLR_SQ06_E010RiMADS_015P14M60-1187Bac25D1026215P13M55-28018P13M40-11421E40M43-15722P12M31-10325P12M61-13726P14M39-23827P13M95-191R29P14M60-11031E40M50-25135ERubLR_SQ01_M2037P13M95-19539P13M40-30940P14M61-22341E40M58-24944P13M40-11546P13M58-24250P13M95-193R53P13M95-287R58P13M95-294R59E40M43-11261ERubLR_SQ19_A0563ERubLR_SQ05_E0266P13M39-147R70P13M40-24971ERubLR_SQ01_I20P12M121-169
73
Rubpara_SQ005_K2377P13M60-321R80P13M60-199R84
F_
PC
O1
(LO
D 4
.7)
F_
Op
en
(LO
D 7
.5)
F_
Se
t (LO
D 6
.4)
F_
PC
O4
(LO
D 3
.8)
F_
Gre
en
(LO
D 4
.2)
He
ight (L
OD
4.1
)
Chromosome 5
E40M50-1670P14M39-2326E40M61-2778P13M95-117R11P14M61-217P13M40-187
14
Rub43a17Rub1b19Rub123a24Rubnebp41929
E41M39-15551P13M40-12952P13M58-26557P13M40-8567P14M39-38368P12M31-14570P13M60-158R72P13M39-109RP14M61-164
74
P14M61-15676E40M43-205E41M31-156
77
Rub118b78E40M43-8279E41M40-31580LEAF10282LEAF9783P13M58-23084P13M55-31590
F_
PC
O2
(LO
D 7
.9)
F_
PC
O4
(LO
D 3
.1)
F_
Gre
en
/Red
(LO
D 6
.0)
Chromosome 6
Anthocyanins in Raspberry Anthocyanins in mapping progeny and parents:
cyanidin-3-sophoroside (C3S)
cyanidin-3-glucoside (C3G)
cyanidin-3-glucosylrutinoside (C3GR)
cyanidin-3-rutinoside (C3R)
pelargonidin-3-sophoroside (P3S)
pelargonidin-3-glucoside (P3G)
pelargonidin-3-glucosylrutinoside (P3GR)
pelargonidin-3-rutinoside (P3R)
Major QTL identified for all anthocyanins across seasons and sites
Several transcription factors underlying QTL:
bHLH, FruitE4 encoding a basic leucine zipper (bZIP) transcription factor
Rub119 encoding a NAM (no apical meristem)-like transcription factor
Markers linked to QTL under validation
QTL for anthocyanin production
P14M60-830.025D10SSR044.625D10_end6.7RUB210a11.6RUB257a13.9RUB137a21.3RUB124a27.9Rubpara_SQ008_D0431.5E40M43-9342.2E40M60-10647.9E40M60-12558.8P13M58-8663.4P13M60-11766.0Rubnebp4c8b67.4E40M43-11668.4P13M40-13170.4ERubLR_SQ07_3_C0775.2E40M43-268 E41M42-14879.6RUB47a88.2P14M39-40290.4P12M95-9592.9P12M31-17196.6E41M60-31597.5P14M39-196100.8E41M39-125101.0RUB262b103.2RUB256e107.2bHLH109.3RUB243a RUB119a111.4Rub232b116.0RUB166b119.2Rub244a125.3
LG 1
07 P
T0
7 O
F0
6 O
F
C3S**
07 P
T0
7 O
F0
6 O
F
C3GR**
07 P
T0
7 O
F0
6 O
F
C3G**
07 P
T0
7 O
F0
6 O
F
C3R**
QTL Peak
5 > LOD > 20
P3S* P3G* P3R*
06 O
F
07 P
T0
7 O
F
07 P
T
06 O
F0
7 O
F
P3GR*
06 O
F
07 P
T0
7 O
F
07 P
T
06 O
F0
7 O
F
P14M60-830.025D10SSR044.625D10_end6.7RUB210a11.6RUB257a13.9RUB137a21.3RUB124a27.9Rubpara_SQ008_D0431.5E40M43-9342.2E40M60-10647.9E40M60-12558.8P13M58-8663.4P13M60-11766.0Rubnebp4c8b67.4E40M43-11668.4P13M40-13170.4ERubLR_SQ07_3_C0775.2E40M43-268 E41M42-14879.6RUB47a88.2P14M39-40290.4P12M95-9592.9P12M31-17196.6E41M60-31597.5P14M39-196100.8E41M39-125101.0RUB262b103.2RUB256e107.2bHLH109.3RUB243a RUB119a111.4Rub232b116.0RUB166b119.2Rub244a125.3
P14M60-830.025D10SSR044.625D10_end6.7RUB210a11.6RUB257a13.9RUB137a21.3RUB124a27.9Rubpara_SQ008_D0431.5E40M43-9342.2E40M60-10647.9E40M60-12558.8P13M58-8663.4P13M60-11766.0Rubnebp4c8b67.4E40M43-11668.4P13M40-13170.4ERubLR_SQ07_3_C0775.2E40M43-268 E41M42-14879.6RUB47a88.2P14M39-40290.4P12M95-9592.9P12M31-17196.6E41M60-31597.5P14M39-196100.8E41M39-125101.0RUB262b103.2RUB256e107.2bHLH109.3RUB243a RUB119a111.4Rub232b116.0RUB166b119.2Rub244a125.3
LG 1
07 P
T0
7 O
F0
6 O
F
C3S**
07 P
T0
7 O
F0
6 O
F
C3GR**
07 P
T0
7 O
F0
6 O
F
C3GR**
07 P
T0
7 O
F0
6 O
F
C3G**
07 P
T0
7 O
F0
6 O
F
C3G**
07 P
T0
7 O
F0
6 O
F
C3R**
07 P
T0
7 O
F0
6 O
F
C3R**
QTL Peak
5 > LOD > 20
P3S* P3G* P3R*
06 O
F
07 P
T0
7 O
F0
6 O
F
07 P
T0
7 O
F0
6 O
F
07 P
T0
7 O
F
07 P
T
06 O
F0
7 O
F0
7 P
T
06 O
F0
7 O
F0
6 O
F0
7 O
F
P3GR*
06 O
F
07 P
T0
7 O
F0
6 O
F
07 P
T0
7 O
F
07 P
T
06 O
F0
7 O
F
P13M55-1250.0P13M39-450R9.4P14M61-9724.8GalSNP30.6RUB126b33.0P14M39-9834.1Rub278b39.8Rub236b44.3P13M40-23946.0P12M31-20046.9P13M55-25948.9RUB57a51.7RUB153a52.2P13M60-172R54.2P12M61-16554.5E40M43-30055.7FRUITE458.0P13M39-303R60.7P13M58-28873.2Rub212a78.1E41M40-20581.9Rub264b298.9ERubLR_SQ19_3_G09100.4ERubLR_SQ01_B06101.3RubEndoSQ004_N23102.6ERubLRSQ07_2_H02103.3RUB280a103.8RUB167aR110.5RUB260a113.7E41M41-185118.2
LG 4
QTL Peak
3 > LOD > 7.3
07 P
T0
7 O
F0
6 O
F
C3R**
07 P
T0
6 O
F
C3G**
07 P
T0
6 O
F
C3S** P3S*
06 O
F
P3R*
06 O
F
P3GR*
07 P
T0
7 O
F0
6 O
F
P3G*
06 O
F
P13M55-1250.0P13M39-450R9.4P14M61-9724.8GalSNP30.6RUB126b33.0P14M39-9834.1Rub278b39.8Rub236b44.3P13M40-23946.0P12M31-20046.9P13M55-25948.9RUB57a51.7RUB153a52.2P13M60-172R54.2P12M61-16554.5E40M43-30055.7FRUITE458.0P13M39-303R60.7P13M58-28873.2Rub212a78.1E41M40-20581.9Rub264b298.9ERubLR_SQ19_3_G09100.4ERubLR_SQ01_B06101.3RubEndoSQ004_N23102.6ERubLRSQ07_2_H02103.3RUB280a103.8RUB167aR110.5RUB260a113.7E41M41-185118.2
P13M55-1250.0P13M39-450R9.4P14M61-9724.8GalSNP30.6RUB126b33.0P14M39-9834.1Rub278b39.8Rub236b44.3P13M40-23946.0P12M31-20046.9P13M55-25948.9RUB57a51.7RUB153a52.2P13M60-172R54.2P12M61-16554.5E40M43-30055.7FRUITE458.0P13M39-303R60.7P13M58-28873.2Rub212a78.1E41M40-20581.9Rub264b298.9ERubLR_SQ19_3_G09100.4ERubLR_SQ01_B06101.3RubEndoSQ004_N23102.6ERubLRSQ07_2_H02103.3RUB280a103.8RUB167aR110.5RUB260a113.7E41M41-185118.2
LG 4
QTL Peak
3 > LOD > 7.3
07 P
T0
7 O
F0
6 O
F
C3R**
07 P
T0
6 O
F
C3G**
07 P
T0
6 O
F
C3S** P3S*
06 O
F
P3R*
06 O
F
P3GR*
07 P
T0
7 O
F0
6 O
F
P3G*
06 O
F
Kassim et al., 2009
Raspberry Volatiles Analysis
Season Field 2006 Field 2007 Polytunnel 2007
Sample Progeny Progeny Progeny
Volatile Mean± SEM Min-Max Mean ± SEM Min-Max Mean ± SEM Min-Max
b-damascenone 72.29 ± 4.02 0 – 463.8 87.10 ± 6.82 0 – 872.10 64.88 ± 4.71 3.17 - 368.8
b-ionone 13.65 ± 0.53 0.46 – 47.88 9.83 ± 0.44 0.61 – 44.33 6.43 ± 0.36 0.25 - 33.02
a-ionone 7.31 ± 0.19 1.65 – 17.16 3.86 ± 0.14 0.79 – 13.82 5.16 ± 0.24 0.22 - 21.61
a-ionol 2.24 ± 0.09 0.16 – 7.28 1.83 ± 0.09 0.24 – 11.68 5.96 ± 0.30 0.16 - 29.97
Linalool 4.72 ± 0.32 0.67 – 22.26 2.90 ± 0.17 0.33 – 14.52 4.39 ± 0.20 0.90 - 29.28
Geraniol 2.64 ± 0.08 0.68 – 8.87 1.82 ± 0.07 0.44 – 10.74 3.68 ± 0.14 0.11 - 15.46
(Z)-3-hexenol 22.35 ± 0.34 0.71 – 28.15 9.06 ± 0.29 0.63 – 28.18 16.70 ± 0.67 0.07 - 54.03
Acetic acid 1.39 ± 0.06 0.06 – 8.26 0.64 ± 0.05 0.01 – 4.05 0.72 ± 0.03 0.01 - 3.54
Hexanoic acid 6.54 ± 0.35 0.89 – 41.68 7.97 ± 0.30 1.71 – 22.88 7.04 ± 0.34 0.28 - 30.84
Acetoin 1.02 ± 0.05 0.09 – 4.74 1.03 ± 0.04 0.10 – 4.79 0.80 ± 0.05 0.02 – 4.95
Benzyl alcohol 0.59 ± 0.03 0.15 – 2.18 1.07 ± 0.04 0.09 – 3.16 2.67 ± 0.11 0 - 9.94
E41M60-1840.0FRUITE8OMT9.3ERUB271PR11.8ERubLR_SQ01_P18unk14.4ERubLR_SQ01_FG23Pgl15.2Ri26Sprot16.5RiSnf117.3ERubLR_SQ07_1_E10TF18.5RUB279a20.0ERubLR_SQ13.2C12IPPI20.8RubnebH1522.3ERubLR_SQ12.4_A04DMQ22.4ERubLR_SQ4.2_A08LTP23.5P13M58-11231.1P12M121-12733.7P13M55-11235.4RUB20a37.1P13M55-9838.7P12M121-18647.2ERubLR_SQ13.2_E09Exp53.2454C6570_ISPH57.8P12M31-15564.0Rub242a68.2E41M31-15370.0E41M31-14771.7P13M55-25173.2RiM01573.3RiCTR1 454C2985_PhysynRub177a1
73.7
E40M55-17574.5ERubLR_SQ07_4_D05unk77.0RUB19a77.9Rub2a179.6RUB2a280.5E41M31-16084.3RUB233a85.2ERubLRcont74PME-I87.1E41M31-16788.3P13M95-214R88.4P14M61-12489.6RißGal191.7Ri9022_RZnf93.5Ri9022_BRX93.9RiMYB95.7Ri9022SSR0196.4E40M43-9597.7Ri9022_GTPbindp98.7Ri9022_AP2_prot100.3454C3991_PME102.3P13M60-223R102.9E41M40-136104.4P14M39-145108.2P14M60-131117.1ERubLath2_cont24119.1ERubLath2_cont21119.6ERubLR_SQ12.2_C05Acon126.2P14M60-129130.7ERubLR_SQ10.2_E02SAM135.7ERubLR_SQ05.3_D11AOC136.4E41M39-138140.8P13M40-203147.6Rub120a150.6RUB223a153.0P14M39-92157.5Rub238h161.2Rub259b168.3RUB259f180.7
a-io
nol_
07 9
0%
a-io
nol_
06 9
0%
a-io
none_06 9
5%
a-io
none_07 P
T 9
5%
b-io
none_07 9
0%
b-io
none_07P
T 9
0%
dam
ascenone_06 9
5%
dam
ascenone_07P
T 9
0%
b-a
lcohol_
06 9
5%
b-a
lcohol _
07P
T 9
0%
hexanoic
acid
07P
T 9
0%
hexenol_
06 L
OD
3.0
hexenol_
07P
T L
OD
3.0
rasp k
eto
ne_07P
T 9
5%
3
Volatiles QTL and some of the underlying genes:Phytoene synthasePMRISPHCTR1 IPPI
Vaccinium
Mapping of key traits
Mapping population developed (Draper
x Jewel), segregating for:
Fruit size
Firmness
Flavour
Sugar/acid ratios
Tetraploid mapping developed at JHI for
potato used to map traits
Linkage Analysis and QTL Mapping Separate markers into linkage groups, based on independent
segregation
Order markers to obtain linkage maps
Relate marker data to phenotypic traits to identify regions
containing QTLs
• Putative quality-related QTL mapped using TetraploidMapsoftware
• Identification of linked markers in progress
• Berry Weight• Total Anthocyanins (Cyanidin-3-glucoside equivalents mg/L)• Sugar:Acid ratio
Sc6Ms4f07c0.0ScCo2784.0Jo36828a18.5Jo50936b29.7Jo116433.7ScCA344b34.2Jo43043.2JoCon78c60.7Pb-CA85564.3NbVac28857366.7ScContig600b69.1Pb-CA34469.7Jo1107a86.9Jo50936a91.8Jo53769b92.6Jo38168c100.0ScCA344a115.4NbVc110398a148.7NbVc123749151.1Sc5ms-2C09a157.7Jo53769a174.6Jo50936c181.2Jo94595b181.9JoCon78a183.3ScContig600a188.0Jo1030b195.7Sc5ms-2C09b202.0Jo628a210.9ScCA325a220.0ScCo646221.9NbVc124930223.3ScCa106223.4PbCA94b224.5ScCA325b230.0Jo1030a231.5Sc2Ms2a02a234.6Jo628b247.2Jo94595a281.1Jo536b307.3NbVc110398b313.8Nb6ms2c10315.2Jo991a331.7ScCo505338.5Jo799b355.5Sc6Ms4f07a359.6Pb-NA172365.2Pb-CA61385.9ScVc.287779c418.4Jo73891c431.1NbVac123022434.3JoSL282b442.9Jo1107b459.7JoNA619b471.4Pb-NA1778482.3Jo36828b521.5Pb-NA800582.7
Wdth
(P<
0.0
01)
Wdth
(P<
0.0
1)
Wgt(P
<0.0
1) Anth
o(P
<0.0
1)
Anth
o (P
<0.0
1)
Sug:A
cd
(P<
0.0
1)
Scar (P
<0.0
1)
12
Vaccinium Fruit Quality QTL
Summary Marker-assisted breeding in berry fruit
offers potential for faster cultivar development and reduction in both time and costs of breeding programmes
Exploitation of genomics resources now possible even for minor crops
Focus must be on quality traits important to industry and end-users
Combining markers for both quality and agronomic traits is the long-term aim
Improved phenotyping methods are essential
Acknowledgements
James Hutton InstituteChristine Hackett Rob HancockDerek StewartPete Hedley
RubusJulie GrahamKay SmithMary WoodheadSandie WilliamsonAlastair Patterson (University of Strathclyde)
RibesSandra Gordon Dorota JarretJoanne RussellLinzi Jorgensen
VacciniumSusan McCallumJulie GrahamNahla Bassil (USDA, OR)Jim Hancock (Michigan State U)