Table 4

QTL detected after multiple-trait analyses for gill index and ion plasma concentrations 24 h after an osmotic challenge at 30 ppt salinity

Analysis

Traitsa

LG (Chr)b

Max LRTc

Position d

CI e

QTL effectf

nHg


Na+1

Na+2

Cl-1

Cl-2

Gill index

LR

HR


Significant QTL


2 traits

Cl-

RT4 (Omy25)

32.6 *

14

2-25

0.51

0.29

5

3

RT10 (Omy6)

37.1 *

21

14-27

0.26

0.41

4

2


Challenge 2

RT10 (Omy6)

46.5 ***

21

16-28

0.29

0.45

6

4

RT19 (Omy11)

39.4 *

119

105-119

0.28

0.31

8

3


4 traits

Plasma ions

RT10 (Omy6)

65.4 *

20

18-28

0.27

0.43

0.26

0.41

4

9


5 traits

All traits

RT10 (Omy6)

76.8 *

26

20-37

0.25

0.31

0.23

0.33

0.32

9 (4)

6(2)


Suggestive QTL


2 traits

Na+

RT14 (Omy19)

34.6

27

20-34

0.30

0.35

6

4

Cl-

RT5 (Omy22)

33.1

30

0-34

0.36

0.29

0

7

RT23 (Omy8)

35.8

114

103-123

0.37

0.52

5

7

RT26 (Omy24)

32.6

55

42-55

0.35

0.26

7

1


Challenge 1

RT7 (Omy15)

37.1

0

0-10

0.45

0.38

7

3


Challenge 2

RT9 (Omy12)

36.1

17

8-25

0.45

0.49

3

6

RT23 (Omy8)

36.2

108

90-128

0.41

0.53

3

8


4 traits

Plasma ions

RT5 (Omy22)

60.2

30

0-34

0.32

0.31

0.37

0.29

4

8

RT19 (Omy11)

63.8

119

93-119

0.36

0.29

0.29

0.30

11

4


5 traits

All traits

RT4 (Omy 25)

64.9

10

0-11

0.23

0.33

0.54

0.33

0.39

13(2)

2(2)

RT19 (Omy11)

76.5

119

83-119

0.34

0.36

0.26

0.31

0.29

13(1)

4(1)


a: Challenge 1,2: multiple-trait analysis for respectively (Na+1,Cl-1) and (Na+2, Cl-2); Na+, Cl-: multiple-trait analysis for respectively (Na+1, Na+2) and (Cl-1, Cl-2); Plasma ions: multivariate analysis for (Na+1, Na+2, Cl-1, Cl-2).

b : linkage group, according to Guyomard et al. [19] and corresponding physical chromosomes (Chr) according to Phillips et al. [20].

c: maximum likelihood test value (LRT) and corresponding chromosome-wide significance level (no indication: P < 0.10; *: P < 0.05; ***: P < 0.005); *** also indicates a genome-wide significance level at P < 0.05.

d: position on the consensus linkage group rebuilt with the families of the design.

e: confidence interval of the position estimated with the 'drop off' method.

f: mean QTL substitution effect (in phenotypic standard deviation of the trait) in the families with significant QTL effect (P < 0.05).

g: nH is the total number of F1 parent segregating for the QTL (in brackets: number of parents for gill index). LR and HR indicate the line having transmitted the allele with an increasing effect on the trait.

Le Bras et al. BMC Genetics 2011 12:46   doi:10.1186/1471-2156-12-46

Open Data