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Table 3 Phenotypic correlation coefficients of individual variability in number total born piglets (Range_TBP), maximum and minimum number of total born piglets (TBP_Max and TBP_Min), and in addition both the number piglets born alive in first parity (NBA_first) and the individual relative number of still born piglets (SB_rel)a obtained from RA01 (n = 5509, above diagonal) and from RACOM (n = 3926, below diagonal), Pearson correlation coefficients were significant at P < 0.0001, besides those marked by superscript letters

From: Maximum number of total born piglets in a parity and individual ranges in litter size expressed as specific characteristics of sows

 

RA01 (above diagonal)

  

Range_TBP

Max_TBP

Min_TBP

NBA_first

SB_rel

RACOM

Range_TBP

------ 

0.478

−0.669

− 0.145

0.079

(below diagonal)

Max_TBP

0.475

-------

0.316

0.277

0.287

Min_TBP

−0.672

0.332

-------

0.392

0.159

NBA_first

−0.219

0.257

0.452

-------

0.011b

SB_rel

0.086

0.286

0.148

−0.003c

------

  1. aSB_rel was based on phenotypic on all available parities observations on still births adjusted for fixed effects of breed indicator (within RACOM), parity number, herd, year and season using the basic data set (in total, 63,000 records in RA01, 41,500 records in RACOM) for all sows included in the current study
  2. bP = 0.4256
  3. cP = 0.8437