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Chromosome Linkages PDF Print E-mail
Wednesday, 16 July 2008


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URL: http://home.ezweb.com.au/~kazballea/genetics/linkages.html
Last updated: 27 May, 2007

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Linkages

  • Introduction on linkages
  • Linkages tables, categorised into chromosome groups
  • Map units

 


Chromosome Linkages Table


The following linkage map table is based on the following books:

1. Crawford (ed.) (1990) Poultry Breeding and Genetics.
2. Stevens, L. (1991) Genetics and Evolution of the Domestic Fowl.
3. Muir and Aggrey (ed.) (2003) Poultry Genetics, Breeding and Biotechnology, CABI Publishing.

# All hashed data is from the last book (Muir & Aggrey), & is based on the following quote from this book (page 499):

The classical linkage groups I, IV and Z correspond to chromosomes 1, 2 and Z, and linkage group II to linkage group E22C19W28. These results also clearly show that several of the linkages reported in the past are incorrect. For example, naked neck and blood group P are located not on chromosome 1 (linkage group 1) but on chromosome 3 and extension of eumelanin (MC1R) is not located on chromosome 1 but located on microchromosome 11 (Takeuchi et al., 1996; Sazanov et al., 1998; Kerje et al., 2003, unpublished).

*Note, the recessive white locus (Tyrosinase) map reference is from Dr Ron Okimoto (pers. comm.)

 
       
Locus Map Unit
Distance
Locus Description
Comments
Group I : (# Chromosome 1- new)
Cp
 
 Creeper  
 
0.4
    
R
   Rose Comb  
 
30
    
U
   Uropygial linkage not given to lav

----------------------------
-----------
------------------
--------------
the below not linear
     
lav
32.5
 Lavender lav 32.5 map units to R
 
?
   linkage not given between lav & Mp
Mp
16
 
 Mp 16 map units to R
the above not linear
     
 
      
Group II (# linkage group E22C19W28- new)
fr
   Fray  
 
46
    
Cr
   Crest  
 
12.5
    
I, ID, IS
   Dominant White, Dun, Smoky  
 
17
    
F
   Frizzle  
 
 
    
Group III: (# Chromosome 1- old)
 
 
    
w
 
 Yellow Skin  
 
22
    
Ea-H
   Blood Group H  
 
21
    
se
   Sleepy Eye se is 45 map units from P
 
3
    
Ea-J
   Blood Group J  
p
36
    
O
   Blue Egg-Shell  
 
4
    
Cha
   Charcoal  
 
0.3
    
P
   Pea Comb *Carefoot believed E locus linked to P -43 cM, this later determined incorrect.
 
32
    
Db
   Dark Brown Db is 32 Map units from P
 
12
    
Ml
   Melanotic Ml is 45 + map units from P
 
10
    
Pg
   Pattern  
 
?
    
T
   Tardy  
 
?
    
Ea-P
   Blood Group P (#Chromosome 3 -new)
 
28
    
Na
   Naked Neck (#Chromosome 3 -new)
q
43
    
h
   Hookless - Silkiness  
 
11
    
Fl
   Flightless  
 
?
    
c
   Recessive White Tyrosinase
 
      
Group IV (#Chromosome 2 -new)
DV, DC
 
 Duplex Comb  
 
27
    
M
   Multiple Spurs  
 
33
    
Po, Pod
   Polydactyly, Duplicate  
       
Group V: (Z Chromosome -sex chromosome)
 
 
    
ro
   Restricted Ovulator  
 
3
    
sh
   Shaker  
p
14
    
n
   Naked  
 
7
    
px
   Paroxysm  
 
1.9
    
ln
   Liver Necrosis  
 
3.1
    
dwB, dwM, dw
   Dwarf  
 
3.4
    
wl
   Wingless  
 
0.6
    
pn
 
 Prenatal Lethal  
 
3
    
Kn, Ks, K
 
 Slow Feathering  
 
1.1
    
S, Sal-s, sal
 
 Silver, Imperfect Albinism  
 
4
    
lk
 
 Lady Killer  
 
12
    
Li
 
 Light Down  
 
7
    
y
 
 Recessive White Skin  
 
13
    
br
 
 Brown Eye  
q
27
    
Id, ida, idc,idM
   Dermal Melanin Inhibitor  
 
14
    
BSd, B
   Sex-linked Dilution, Barring  
 
13
    
ko
   Head Streak  
       
Group VI: (W Chromosome -sex chromosome- females only)
       
 
 
    
Group VII (Chromosome 6)
the below not linear
     
Gc, Alb
     
Ade-A
      
Pgm-2
      
the above not linear
     
 
 
    
Group VIII (Chromosome 7)
Ade-B
 
   adenine synthesis B
 
 
    
Group X (Microchromosome 17)
       
p
 
    
B-G
      
       
Ea-B
 
    
 
0.4
    
B-F
   MHC  
R-Rs 1
     
B-L
      
lr-GAT
      
NOR
   Nucleolar organiser region  
q      
       
Ea-B
      
       
#Microchromosome 11
       
E, ER, ER- Fay, eWh, e+, eb, es, ebc, ey, eq
   E Series  
 
 
    

 

 

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