Fatores ambientais sobre o desempenho de progênies de diferentes touros da raça Nelore no semiárido brasileiro

Fernandes, Luis Miguel Gonçalves; Mota, Iara Souza; Paula, Brenda Marques de; Oliva, Raquel Gonçalves; Cunha, Gabriel Santos Persiquini; Chaves, Amália Saturnino

Luis Miguel Gonçalves Fernandes ^**Correspondingauthor: miguelgfff@hotmail.com

Federal University of Minas Gerais, Institute of Agricultural Sciences, Montes Claros, Minas Gerais, Brazil

Iara Souza Mota

Federal University of Minas Gerais, Institute of Agricultural Sciences, Montes Claros, Minas Gerais, Brazil

Brenda Marques de Paula

Federal University of Minas Gerais, Institute of Agricultural Sciences, Montes Claros, Minas Gerais, Brazil

Raquel Gonçalves Oliva

Federal University of Minas Gerais, Institute of Agricultural Sciences, Montes Claros, Minas Gerais, Brazil

Gabriel Santos Persiquini Cunha

Federal University of Minas Gerais, Institute of Agricultural Sciences, Montes Claros, Minas Gerais, Brazil

Amália Saturnino Chaves

Federal University of Minas Gerais, Institute of Agricultural Sciences, Montes Claros, Minas Gerais, Brazil

*Correspondingauthor: miguelgfff@hotmail.com

Tabelas (5)
Fórmulas (1)

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Table 1
Number of observations (N), mean, minimum (Min), maximum (Max) and respective standard deviations (SD) for weaning weight¹ 1 Weaning=205 days; (WW), average daily gain at weaning (ADGW), yearling weight² 2 Yearling=12 months; (YW), average daily gain up to yearling age (ADGY), 18-month weight³ 3 18 months. (18W), average daily gain up to 18- month (ADG18), yearling (YSC) and 18-month (18SC) scrotal circumference.

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Table 2
Summary of analysis of variance for weaning weight¹ 1 Weaning=205 days; (WW), average daily gain at weaning (ADGW), yearling weight² 2 Yearling=12 months; (YW), average daily gain up to yearling age (ADGY), 18-month weight³ 3 18 months. SV= Source of variation; DF= Degrees of freedom; MB= Month of birth; R = coefficient of determination; CV= coefficient of variation. (18W) and average daily gain up to 18-month (ADG18) of PB (purebred) and OR (open registry) Nellore cattle

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Table 3
Number of observations (N), and estimated means forweaning weight¹ 1 Weaning=205 days; (WW), average daily gain at weaning (ADGW), yearling weight² 2 Yearling=12 months; (YW), average daily gain up to yearling age (ADGY), 18-month weight³ 3 18 months. (18W), average daily gain up to 18-month (ADG18), yearling (YSC) and 18-month (18SC) scrotal circumference of male (M) or female (F) Nellore PB (purebred) and OR (open registry) cattle

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Table 4
Estimated means for weaning weight¹ 1 Weaning=205 days; (WW), average daily gain at weaning(ADGW), yearling weight² 2 Yearling=12 months; (YW), average daily gain up to yearling age (ADGY), 18-month weight³ 3 18 months. (18W), average daily gain up to 18-month (ADG18), yearling (YSC) and 18-month (18SC) scrotal circumference of PB (purebred) and OR (open registry) Nellore cattle born in different months

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Table 5
Summary of analysis of variance for yearling scrotal circumference¹ 1 Weaning=205 days; (YSC) and 18-month scrotal circumference² 2 Yearling=12 months; (18SC) of PB (purebred) and OR (open registry) Nellore cattle

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Trait	N	Mean	Min	Max	SD
WW, kg	672	208.5	117.0	373.0	40.17
ADGW,	672	0.871	0.268	1.673	0.196
kg/day YW, kg	651	223.3	107.0	392.0	42.31
ADGY, kg/day	651	0.530	0.211	0.992	0.116
18W, kg	581	20.52	16.00	28.00	2.391
ADG18, kg/day	581	256.0	167.0	397.0	35.07
YSC, cm	581	0.411	0.249	0.667	0.063
18SC, cm	267	21.82	16.00	30.00	2.550

Mean Squares
SV	DF	WW(kg)	ADGW (kg/day)	YW(kg)	ADGY (kg/day)	18W (kg)	ADG18 (kg/day)
PB/OR	1	58968^* ***** P < 0.0001;	1.403^* ***** P < 0.0001;	83275^* ***** P < 0.0001;	0.625^* ***** P < 0.0001;	2199	0.007
Sex	1	40470^* ***** P < 0.0001;	0.962^* ***** P < 0.0001;	251504^* ***** P < 0.0001;	1.887^* ***** P < 0.0001;	2228	0.007
MB	5	29731^* ***** P < 0.0001;	0.707^* ***** P < 0.0001;	51444^* ***** P < 0.0001;	0.385^* ***** P < 0.0001;	51018^* ***** P < 0.0001;	0.168^* ***** P < 0.0001;
Sire	19	3172^ P < 0.01;	0.075^ P < 0.01;	1641^* * P < 0.05;	0.012^* * P < 0.05;	1512^ P < 0.01;	0.004^ P < 0.01;
R² (%)		28.47	28.48	53.54	53.53	40.40	40.36
CV(%)		16.61	19.40	13.17	15.22	10.82	12.25

Pedigree	N	WW (kg)	ADGW (kg/day)	YW (kg)	ADGY (kg/day)	18W (kg)	ADG18 (kg/day)	YSC (cm)	18SC (cm)
PB	353	223.7	0.944	239.8	0.574	263.2	0.423	20.72	21.73
OR	388	204.1	0.849	214.5	0.505	253.3	0.405	20.19	21.17
Sex
F	358	206.3	0.860	207.8	0.487	257.7	0.414	-	-
M	383	221.4	0.933	246.5	0.593	258.7	0.415	-	-

Month/Year of Birth	WW(kg)	ADGW (kg/day)	YW (kg)	ADGY (kg/day)	18W (kg)	ADG18 (kg/day)	YSC (cm)	18SC (cm)
September 2013	288.6	1.261	294.6	0.725	328.9	0.543	23.67	25.00
October 2013	222.6	0.939	243.5	0.585	276.2	0.447	21.56	22.94
November 2013	205.6	0.856	230.0	0.548	264.4	0.426	20.84	21.96
December 2013	205.3	0.855	215.4	0.508	245.6	0.392	19.33	20.77
January 2014	193.2	0.796	197.2	0.458	228.6	0.361	18.75	19.58
February 2014	167.9	0.672	182.1	0.416	205.5	0.319	18.58	18.42

Mean Squares
SV	DF	YSC (cm)	18SC (cm)
PB/OR	1	30.38^ P < 0.01;	12.38
MB	5	110.6^* ***** P < 0.0001;	105.5^* ***** P < 0.0001;
Sire	19	7.072^* * P < 0.05;	7.935^* * P < 0.05;
R² (%)		38.73	39.98
CV (%)		9.49	9.50

[1] *Correspondingauthor: miguelgfff@hotmail.com

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Fatores ambientais sobre o desempenho de progênies de diferentes touros da raça Nelore no semiárido brasileiro

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