5 77 59 68 199 1 137 7 781 69 69 1 1 1 13 1 1 17 1 17 1 1 () Dong Van Vleck 15 7 1 1 1 59 68 199 5 5 59 9 SAS
5 Duncan Multiple Range Test Least squares method N (, σ e) Y ijklmno = μ + P i + S j + A k + G l + W m + R n + e ijklmno σ e l m j 7,,3,,1 I k n Y ijklmno o i μ P I h = S / P rp rg h S P Maximum Likelihood Method 3 1 J 1991 199 1 K 1 5-3 1 L 3-3 31-9 3 8-6 1 M n S j A k G l W m R n E ijklmno 7 5 5 7 7 5 7 5 7 11 17 15 1 71 1 1 71 1 51 1 11 15 1 17 111 1 17 11 51 1 1 11 71 71 1 1 11 17 51 11 1 17 11 11 11 71
5 7 1 38866 61 Moeinil Sanjabi (6) 1 698 185 5658 316 Eicker Garcia 199 3919 5 Mishra 5 Queiroz 1 1 1996 193 17 199 3536 98 5 Tawah 7879 775 Morales 7
5 7781 1 6969 59 1351 5 ab 57796 7 a 185698 66 bc 139916 8 a 667993 568 b 17969 55 a 3795 57 ab 69789 53 b 185687 9 ab 356 5 ab 777851 b 615 37 bc 391 ab 887837 3 b 7671 35 c 3978 37 b 177 198 b 3165658 131 c 5173959 3 b 137676 7783 867815 7775 13 589 361 67 b 13657 b 16655 b 1975 c 1755873 71 79 5 67 c 6138866 ab 37639686 a 376 b 3663919 133 596 361 656 737879 6 a 179739 653 a 37199 61 d 19979 bcd 1779 cd 11767 cd 11767 ab 987933 abc 957891 ab 85793 a 897985 ab 99798 a 1985 a 6789 8 16 31 51 57 33 9 5 18 117 c 785387 ab 661 bc 75968 b 38613 b 66156 ab 16399 b 5611 c 6595 b 661 a 687539 6 8 5 58 39 8 335 6 189 7 e 9893536 d 6638113 ab 51615 bc 5111 bc 5913988 bc 767 a 31937 ab 5595 bc 568 cd 558391 a 5536 a 36178 ab 39393 ab 397 5 19 1 31 55 58 331 95 3 181 199 876 691 59 199 1991 199 1993 199 1995 1996 1997 1998 5-3 8-6 31-9 3-3 a 65779 19 1
5 1 6 **1897 6 **1399 6 339 3 *133 3 **376 3 16399 9 **33875 9 **338586 9 **1657 3 *118889 1 **11137 3 33 116 181 163 5 ** 1 79 199 1995 85 19 199 9 6 1 13 Magid Shin 1 Heat stress Badinga 1 Fonseca 5 Singh Singh 1 1991 1995 36 55 397 5 Reddy Tanej Niliravi 1 Manchisi Brown 7 Cue Maarof
5 1 1 15 15 Dong Van Vleck Short 5 7 Tahir Maarof 5 1 Batra 1 1 5 Hermas 7 17 1 1 17 1 Berger 1 1 1 117 1 17 17 1 1 1 1 1 h 1 rg rp 1 1 1 11
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5 Some of genetic and environmental factors affecting on some reproductive characters in Friesian cows in Iraq G A Avadesian WY Lateef Coll of Agri Univ of Baghdad Ministry of Agriculture Abstract A total of 59 reproductive records representing to 68 Friesian cows at Al-ISHAKI station were collected from the period 199 to Data were statistically analyzed using Least-Square Method to investigate the effect of parity, season and year of calving, age at first calving and sex of birth on calving interval ( CI ), gestation period (GP) and conception rate (CR)The overall mean SE for CI, GP and CR were 1 137, 781 7 days and 69 69 % respectively While heritability estimates for three traits were 1, 13 and 9 respectively Parity and year of calving have a highly significant effect on CI and sex of birth and year of calving had a significant effect ( p< 1) on the GP and male calves were study longer period than female in their mothers uterus which was 13 days A highly significant positive genetic correlation were recorded between CI and GP (7), and a highly negative one were recorded with CR (- 67) This show clearly that improvement of environmental conditions will help us improving CR and bringing to the natural range the CI 15