Genetic Variability in Bracco Italiano Dog Breed Assessed by Pedigree Data

Figures & data

Figure 1. Pedigree completeness level in the whole pedigree data files (GS and GD, grandparents; GGS and GGD, great grandparents).

Figure 2. Inbreeding trend for birth year.

Table 1. Numbers of offspring per sire and per dam, numbers of popular sires and popular dams and percentage of sires and dams that are popular.

Number of sires	1783	Number of dams	2916
Sire offspring		Dam offspring
Maximum	191	Maximum	73
Medium	13.5	Medium	8.2
Number of popular sires	18	Number of popular dams	15
% of total sires	1.01	% of total dams	0.51

Table 2. Main genealogical parameters computed for the Bracco Italiano dog pedigree.

Whole population	24,613
Males	12,191
Females	11,890
Inbreed in the whole population	16,832
Reference population	9006
Males	4589
Females	4417
Inbreed in the reference population Base population	3055
(one or two unknown parents = ft)	616

Table 3. Top 9 ancestors contributing to genetic variability of the reference population.

Ancestors	Sex	Year of birth	Genetic variance, %	Progeny
CI027616	M	1979	11.05	78
CI043072	M	1979	8.18	91
CI054207	M	1986	7.53	191
CI013840	M	1970	5.51	108
CI018248	M	1975	4.85	95
CI052431	F	1985	4.77	34
CI053314	M	1985	3.81	33
CI016197	F	1970	3.50	9
CI013252	M	1970	3.38	53

Table 4. Distribution of inbreeding coefficients in the whole population.

Range	No.
0.00 < F < 0.05	9849
0.05 < F < 0.10	3931
0.10 < F < 0.15	1821
0.15 < F < 0.20	608
0.20 < F < 0.25	291
0.25 < F < 0.30	260
0.30 < F < 0.35	60
0.35 < F < 0.40	12

Table 5. Population statistic on average inbreeding.

Traced generation	Animals, n	Average F, %	Inbred, %	Average F for inbred, %	Mean AR, %
0	532	0.00	0	0	0
1	1860	0.00	0	0	0.55
2	1737	0.70	4.19	16.55	1.19
3	1502	2.34	19.38	12.05	1.82
4	1562	3.00	43.04	6.96	2.46
5	1814	3.88	61.04	6.35	3.01
6	1738	3.61	73.51	4.91	3.53
7	1789	4.13	85.72	4.82	3.92
8	1738	4.66	94.08	4.95	4.15
9	1762	5.30	97.27	5.45	4.46
10	2017	5.76	99.90	5.77	4.75
11	1917	6.52	100.00	6.52	4.98
12	1784	6.04	99.33	6.08	5.04
13	1828	6.27	98.74	6.35	5.16
14	756	6.21	100.00	6.21	5.33
15	237	8.46	100.00	8.46	5.34
16	40	12.39	100.00	12.39	5.58

AR, average relatedness.