View Full Table | Close Full ViewTable 1.

Description of the data set for average annual productivity (PRODAM), yearling weight (YW), postweaning BW gain (PWG), scrotal circumference (SC), and stayability at 6 yr (STAY) in Nelore (Nel) and composite beef cattle (Com).

 
Trait
PRODAM, kg
YW, kg
PWG, kg
SC, cm
STAY, 0 or 1
Item Nel Com Nel Com Nel Com Nel Com Nel Com
Information eliminated
    % animals with record 74.87 58.63 36.44 23.99 36.44 24.29 30.79 20.67 63.36 58.95
    % contemporary groups 62.42 47.86 19.72 29.89 19.78 29.86 15.51 30.94 62.76 53.78
Information remained
    No. of animals in the pedigree 62,106 130,103 155,322 204,663 154,488 198,790 105,102 110,777 67,211 79,507
    No. of sires with progeny record 784 753 1,111 688 1,103 684 1,000 480 713 532
    No. of dams with progeny record 22,550 37,656 50,720 51,887 50,409 50,114 30,691 24,694 23,527 21,891
    No. of animals with record 32,054 46,889 99,242 80,269 98,461 76,956 48,855 32,177 35,409 26,586
    Mean of the trait 129.30 149.48 307.44 279.40 116.59 82.74 27.44 28.65
    SD of the trait 29.31 38.80 46.46 54.07 34.03 45.98 3.38 4.06
    No. of contemporary group 118 292 737 1,175 734 1,151 354 576 181 220
    No. of weaning management group 2,218 1,816 2,205 1,733 1,477 1,202
    No. of successful records 10,322 10,636
    % success 29.20 40.00



View Full Table | Close Full ViewTable 2.

Posterior mean, SD, and 95% highest posterior density interval (HPD) of some parameters for average annual productivity (PRODAM), yearling weight (YW), postweaning BW gain (PWG), scrotal circumference (SC), and stayability at 6 yr (STAY) in Brazilian Nelore and composite beef cattle

 
Nelore
Composite beef cattle
Parameter Mean SD 95% HPD Mean SD 95% HPD
Heritability
    PRODAM 0.23 0.01 0.21 to 0.26 0.14 0.01 0.12 to 0.16
    YW 0.37 0.01 0.36 to 0.39 0.39 0.01 0.37 to 0.41
    PWG 0.21 0.01 0.19 to 0.22 0.21 0.01 0.19 to 0.23
    SC 0.47 0.01 0.45 to 0.50 0.30 0.02 0.27 to 0.33
    STAY 0.25 0.01 0.23 to 0.27 0.20 0.02 0.16 to 0.25
Weaning management group effect as a proportion of phenotypic variance
    YW 0.06 0.00 0.05 to 0.07 0.08 0.00 0.07 to 0.09
    PWG 0.14 0.01 0.13 to 0.16 0.14 0.01 0.13 to 0.15
    SC 0.03 0.00 0.02 to 0.03 0.02 0.00 0.02 to 0.03



View Full Table | Close Full ViewTable 3.

Posterior mean, SD, and 95% highest posterior density interval (HPD) of genetic and environmental correlations between average annual productivity (PRODAM), yearling weight (YW), postweaning BW gain (PWG), scrotal circumference (SC), and stayability at 6 yr (STAY) in Brazilian Nelore and composite beef cattle

 
Nelore
Composite beef cattle
Parameter Mean SD 95% HPD Mean SD 95% HPD
Genetic correlation
    PRODAM–YW 0.02 0.03 –0.04 to 0.07 0.08 0.04 0.00 to 0.16
    PRODAM–PWG 0.20 0.03 0.13 to 0.26 0.07 0.05 –0.02 to 0.18
    PRODAM–SC 0.08 0.03 0.02 to 0.14 0.30 0.05 0.20 to 0.40
    PRODAM–STAY 0.99 0.00 0.98 to 0.99 0.85 0.04 0.77 to 0.91
    YW–PWG 0.78 0.01 0.76 to 0.80 0.94 0.01 0.93 to 0.95
    YW–SC 0.40 0.02 0.36 to 0.43 0.74 0.02 0.70 to 0.78
    YW–STAY –0.02 0.03 –0.08 to 0.04 0.10 0.06 –0.01 to 0.22
    PWG–SC 0.23 0.02 0.19 to 0.28 0.66 0.03 0.60 to 0.71
    PWG–STAY 0.11 0.04 0.04 to 0.17 0.14 0.07 0.00 to 0.29
    SC–STAY 0.01 0.03 –0.06 to 0.08 0.19 0.07 0.06 to 0.33
Environmental correlation
    PRODAM–YW 0.12 0.01 0.10 to 0.14 0.02 0.01 0.01 to 0.03
    PRODAM–PWG 0.08 0.01 0.07 to 0.10 0.01 0.00 0.00 to 0.02
    PRODAM–STAY 0.10 0.00 0.09 to 0.11 0.01 0.00 0.00 to 0.02
    YW–PWG 0.68 0.00 0.68 to 0.69 0.39 0.01 0.38 to 0.40
    YW–SC 0.33 0.01 0.31 to 0.35 0.14 0.01 0.13 to 0.16
    YW–STAY 0.10 0.01 0.08 to 0.12 0.00 0.01 –0.01 to 0.02
    PWG–SC 0.24 0.01 0.23 to 0.26 0.06 0.01 0.05 to 0.07
    PWG–STAY 0.07 0.01 0.05 to 0.08 0.00 0.01 –0.01 to 0.01



View Full Table | Close Full ViewTable 4.

Estimates of annual genetic changes (±SE) from 1996 to 2010 for average annual productivity (PRODAM), yearling weight (YW), postweaning BW gain (PWG), scrotal circumference (SC), and stayability at 6 yr (STAY) in Brazilian Nelore and composite beef cattle

 
Trait
Cattle PRODAM, kg YW, kg PWG, kg SC, cm STAY, %1
Nelore 0.66 ± 0.05*** 1.16 ± 0.07*** 0.78 ± 0.05*** 0.07 ± 0.00*** 0.60 ± 0.05***
Composite 0.05 ± 0.04 0.70 ± 0.04*** 0.37 ± 0.03*** 0.05 ± 0.00*** 0.07 ± 0.04
1Expected breeding value expressed on percent probability.
***Genetic trend significantly different from 0 (P < 0.0001).