Analysis of polygenic selection in purebred and crossbred pig genomes using generation proxy selection mapping

Table 4 Descriptive statistics by subset for AGE (difference, in months, between each pig’s birth date and January 2006)

Subset	Populations	Pigs, n	Mean	SD	Minimum	Maximum
1	Duroc	16,595	144.9	20.44	55	171
2	Landrace	15,457	144.0	18.23	55	171
3	Yorkshire	15,772	144.2	18.46	64	171
4	Crossbred	8447	142.8	17.20	110	164
5	Duroc and Landrace	32,066	144.5	19.41	55	171
6	Duroc and Yorkshire	32,387	144.6	19.50	55	171
7	Duroc and crossbred	25,053	144.2	19.43	55	171
8	Landrace and Yorkshire	31,240	144.1	18.34	55	171
9	Landrace and crossbred	23,905	143.6	17.88	55	171
10	Yorkshire and crossbred	24,230	143.7	18.04	64	171
11	Duroc, Landrace and Yorkshire	47,849	144.4	19.10	55	171
12	Duroc, Landrace, and crossbred	40,513	144.1	18.98	55	171
13	Duroc, Yorkshire, and crossbred	40,837	144.2	19.06	55	171
14	Landrace, Yorkshire, and crossbred	39,688	143.8	18.11	55	171
15	Duroc, Landrace, Yorkshire, and crossbred	56,296	144.2	18.84	55	171

ISSN: 1297-9686