Table 3 The results of the PCR diagnostic test for intron 4 of the TYR gene on chickens sampled in the recessive white experimental line at INRA and in five commercial lines of slow-growing type chickens

Sires

6

recessive white

6

-

-

3

colored

-

1

2

Dams

3

recessive white

3

-

-

41

colored

-

5

36

Progeny

38

recessive white

38

-

-

54

colored

-

4

50

Set 2. Commercial lines, slow-growing type, 229 birds

Phenotype

Size and number of amplified band(s) with the PCR diagnostic test

Number

345 bp

481 bp

481 bp+345 bp

Line A

61

recessive white

61

-

-

Line B

30

colored

-

30

-

Line C

55

colored

-

45

10

Line D

5

recessive white

5

-

-

26

colored

-

15

11

Line E

2

recessive white

2

-

-

50

colored

-

48

2