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Table 2 Locations, effects and significance of QTL detected for papaya fruit quality traits

From: Linkage mapping and quantitative trait loci analysis of sweetness and other fruit quality traits in papaya

Trait

QTL

LG

QTL Peaka

LOD

Interval (cM)

Closest marker

Posb

%Varc

P d

AEe

Flesh sweetness

SWE_2016

7

33.7

15.1

31.7–34.6

sCT_80_62821387

33.6

11.6

**

−0.64

SWE_2017

3

6.2

7.0

0.0–11.2

sCT_6_9957924

6.2

3.3

–

-0.46

7

4.0

13.2

0.0–14.0

sCT_12_17261968

0.0

10.6

***

−0.68

Fruit weight

WEI_2016

1

52.9

6.2

48.8–56.8

sCT_20_25190533

52.8

14.2

–

148.33

4

18.6

4.2

14.7–21.0

sCT_6_10945637_2

19.1

12.7

**

71.29

10

15.6

3.2

0.0–26.5

sCT_48_47598629

6.5

4.6

–

78.21

WEI_2017

1

51.1

5.5

45.8–55.8

sCT_20_25182916

51.1

13.9

–

140.40

4

17.6

5.6

16.0–20.6

sCT_6_10847720

17.6

11.3

**

129.78

10

15.6

3.6

0.0–26.5

sCT_48_47598629

6.5

5.2

–

93.81

Fruit length

LEN_2016

1

30.4

5.8

19.3–39.2

sCT_42_43407698

36.2

17.2

–

1.93

6

47.0

8.1

0.0–12.2

sCT_50_48742082

47.0

12.3

*

0.70

LEN_2017

1

29.4

5.9

15.3–49.8

sCT_42_43407698

36.2

19.8

–

1.84

3

4.3

4.5

43.1–50.0

sCT_6_9994764_1

3.3

5.8

*

0.32

Fruit width

WID_2016

4

13.4

17.3

12.8–16.0

sCT_6_10818885

13.9

19.5

**

0.39

WID_2017

1

99.9

15.1

94.2–105.7

sCT_43_43923875

99.8

6.5

–

0.34

4

13.9

20.7

13.8–17.1

sCT_6_10818885

13.9

12.5

**

0.45

6

49.7

13.7

45.3–55.8

sCT_50_48651826

50.0

3.3

**

−0.17

9

51.5

11.7

47.1–55.3

sCT_37642_123643261

50.4

6.8

***

−0.65

Skin freckle

FRE_2016

2

25.0

7.6

17.0–27.0

sCT_3_6222563

28.0

7.45

*

−0.23

9

10.5

5.5

0.0–32.2

sCT_33_36735495

9.5

8.5

*

−0.41

FRE_2017

2

26.0

5.6

15.0–27.0

sCT_3_6222563

28.0

6.27

*

−0.03

6

39.1

5.1

28.5–49.7

sCT_16_21825379_2

39.1

3.23

**

0.47

9

8.2

4.3

0.0–32.2

sCT_33_36735495

9.5

7.45

*

−0.25

Fruit firmness

FIR_2016

1

80.4

8.7

75.0–85.8

sCT_751_106036863

81.0

16.3

*

−0.74

3

6.2

7.7

0.0–10.2

sCT_6_9957924

6.2

6.1

*

0.10

5

13.3

3.4

0.0–22.8

sCT_7_12095557

6.3

4.3

–

0.38

9

16.5

5.1

11.4–23.4

sCT_33_36735495

9.5

3.1

–

0.30

10

4.9

5.2

0.0–17.5

sCT_48_47598629

6.5

4.4

*

−0.28

FIR_2017

1

82.0

9.3

78.3–86.1

sCT_751_106036864

82.8

15.5

*

−0.69

3

6.2

6.4

0.0–12.2

sCT_6_9957924

6.2

7.7

*

0.16

9

16.5

5.0

11.4–23.4

sCT_33_36735495

9.5

6.8

–

0.27

10

4.9

4.7

0.0–17.5

sCT_48_47598629

6.5

5.8

*

−0.25

Flesh thickness

THI_2016

4

3.0

11.7

0.0–5.5

sCT_6_10509125

3.1

8.4

**

0.26

9

34.9

9.9

32.5 39.7

sCT_114_74895785

34.9

4.3

–

0.61

THI_2017

9

44.1

13.4

34.8–50.4

sCT_34334_12288738

44.5

6.5

–

0.60

  1. aPosition of QTL peak (cM). bClosest marker position. cPercentage of explained phenotypic variance. dSignificance in single marker analysis at p-value ≤0.05 (*), 0.01 (**) and 0.001 (***) determined by Kruskal-Wallis test. eAdditive effect (where a positive value indicates that alleles from RB2 contributed to increasing the trait score and a negative value indicates that alleles from Sunrise Solo contributed to increasing the trait score)