Cross table 42: Combination of ino and fallow

First year

mating: hen 1
0-1 fallow
(f)
cock 1
1-0 ino
(i)
1-0 wildtype (/i/f)
0-1 ino (i/f)

The combination of ino and fallow is a combination of sex-linked and recessive factors. Mating a fallow hen and an ino cock gives the young we need. Both have the fallow factor, the cock is wildtype double split, the hen is ino split for fallow.


Second year

mating hen 1
0-1 ino (i/f)
cock 1
1-0 wildtype (/i/f)
1-0 ino-fallow (i+f)
1-0 ino (i/f)
1-0 fallow (f/i)
1-0 wildtype ( /i/f)
1-0 wildtype (/i)
0-1 ino-fallow (i+f)
0-1 ino (i)
0-1 fallow (f)
0-1 wildtype (/f)

Mating the wildtype, double split cock and the ino split fallow hen gives the first combined ino-fallow, cocks and hens. We have to find out the genetical make up of the hens, because we use them in the third year.


Third year

mating hen 1
0-1 ino-fallow (i+f)
cock 1
1-0 wildtype (/i/f)
1-0 ino-fallow (i+f)
1-0 ino (i/f)
1-0 fallow (f/i)
1-0 wildtype (/i/f)
0-1 ino-fallow (i+f)
0-1 fallow (f)
0-1 ino (i/f)
0-1 wildtype ( /f)

The third year the best combination is a wildtype double split cock and an ino-fallow hen. This will bring the best results. (see cross42a)

We have to discuss the purpose of combining this factors. Both are mutation factors of the melanin. Probably the combination is made to intensify the red pigment in the plumage. In this case we have to inspect the amount of red pigment of the birds we are using. The combination of ino and pastel is sometimes made for the same reason. The inheritance of the pastel factor is recessive also. So you can use the same cross-tables 42 and 42a and read for fallow: pastel. Use in this case the red pastel.


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Copyright 2003 by Bob Fregeres

E-mail: fregeres@bourkes-parakeet.nl

2/2/04