PhD Thesis abstract published online as a service to the JDR Community.
Determination of genetic and phenotypic parameters in some yield characteristics of Hair, Alpine × Hair and Saanen × Hair crossbred goats raised under semi-intensive conditions
Hakan Erduran
Turkey
Hakan Erduran
Turkey
Abstract
This study was carried out to determine the reproduction and milk production characteristics and the heritability and the repeatability of these traits for Hair, Alpine × Hair F1 (AHF1), Alpine × Hair F2 (AHF2), Alpine × Hair B1 (AHB1), Saanen × Hair F1 (SHF1), Saanen × Hair F2 (SHF2) and Saanen × Hair B1 (SHB1) goats reared under semi-intensive conditions in three goat flocks, located within two villages of Selcuklu District of Konya Province in 2014 and 2015. Birth rates, litter size at birth and litter size at weaning were 93.6%, 95.4% and 96.7%;1.15, 1.21 and 1.32; 1.01, 1.02 and 1.09 for Hair, AHF1 and SHF1 crossbred goats at their first four lactations, respectively while birth rates, litter size at birth and litter size at weaning were 90.9%, 94.2%, 94.4%, 88.7%, 95.9%, 95.2% and 90.0%; 1.11, 1.18, 1.24, 1.38, 1.28,1.28 and 1.42; 0.93, 0.97, 1.04, 1.06, 1.01, 1.03 and 1.03 for Hair, AHF1, AHF2, AHB1, SHF1, SHF2 and SHB1 crossbred goats their first two lactations, respectively. At the lactation milk yields, lactation lengths and average daily milk yields of Hair, AHF1 and SHF1 crossbred goats at first four lactations were 220.9 kg, 297.1 kg and 323.2 kg; 212.1 days, 222.3 days and 223.8 days; 1.039 kg, 1.334 kg and 1.442 kg respectively. The lactation milk yields, lactation lengths and average daily milk yields of Hair, AHF1, AHF2, AHB1, SHF1, SHF2 and SHB1 crossbred goats at first two lactations were 203.2 kg, 264.5 kg, 251.8 kg, 283.2 kg, 287.2 kg, 255.0 kg and 292.3 kg; 210.6 days, 220.6 days, 214.8 days, 221.3 days, 221.6 days, 214.3 days and 224.5 days; 0.960 kg, 1.197 kg, 1.169 kg, 1.280 kg, 1.293 kg, 1.191 kg and 1.301 kg respectively. Average milk fat, protein, lactose, milk solid percentages and total fat and protein yields of Hair, AHF1 and SHF1 crossbred goats at their first four lactations were 5.15%, 4.82% and 4.80%; 4.01%, 3.87% and 3.84%; 5.51%, % 5.31 and 5.31%; 15.28%, 14.71% and 14.6%; 11.13 kg, 13.83 kg and 15.13 kg; and 8.87 kg, 11.48 kg and 12.38 kg respectively. The same parameters for Hair, AHF1, AHF2, AHB1, SHF1, SHF2 and SHB1 goats at their first two lactations were 5.25%, 5.08%, 4.74%, 4.83%, 4.93%, 4.84% and 4.57%; 4.07%, 3.95%, 3.94%, 3.85%, 3.89%, 3.89% and 3.84%; 5.60%, 5.37%, 5.32%, 5.26%, 5.37%, 5.31% and 5.17%; 15.50%, 15.11%, 14.75%, 14.72%, 14.83%, 14.81% and 14.47%; 10.35 kg, 13.17 kg, 11.63 kg, 13.54 kg, 13.93 kg, 12.17 kg and 13.31 kg; 8.31 kg, 10.42 kg, 9.94 kg, 10.93 kg, 11.14 kg, 9.93 kg and 11.22 kg respectively. Heritability estimates of the litter size at birth and litter size at weaning were 0.08 and 0.14, respectively for the goats at their first four lactations, while the repeatability estimates of the litter size at birth and litter size at weaning were 0.35 and 0.49, respectively. The same parameters for the goats at their first two lactations were 0.17 and 0.22; 0.32 and 0.41, respectively. Heritability estimates ranged from 0.18 to 0.32 for the milk yields, 0.10 to 0.16 for lactation length, 0.24 to 0.45 for fat percent, 0.43 to 0.54 for protein percent, 0.18 to 0.38 for fat yield, 0.21 to 0.51 for protein yield. Repeatability estimates varied from 0.26 to 0.51 for milk yield, 0.12 to 0.61 for lactation length, 0.24 to 0.79 for fat percent, 0.45 to 0.62 for protein percent, 0.20 to 0.63 for fat yield, 0.26 to 0.60 for protein yield. The estimated heritability for birth weight, live weights at two months of age, at three months (weaning) of age and at six months of age of the kids that were born from the goats at their first four lactations were 0.33, 0.26, 0.30 and 0.35. The estimated heritability for those were born from the goats at their first two lactations was 0.25, 0.24, 0.22 and 0.32 respectively.
It is concluded that the milk yield traits of Hair goats can be improved substantially through improving the husbandry and feeding conditions by applying an appropriate selection program and crossbreeding scheme.
This study was carried out to determine the reproduction and milk production characteristics and the heritability and the repeatability of these traits for Hair, Alpine × Hair F1 (AHF1), Alpine × Hair F2 (AHF2), Alpine × Hair B1 (AHB1), Saanen × Hair F1 (SHF1), Saanen × Hair F2 (SHF2) and Saanen × Hair B1 (SHB1) goats reared under semi-intensive conditions in three goat flocks, located within two villages of Selcuklu District of Konya Province in 2014 and 2015. Birth rates, litter size at birth and litter size at weaning were 93.6%, 95.4% and 96.7%;1.15, 1.21 and 1.32; 1.01, 1.02 and 1.09 for Hair, AHF1 and SHF1 crossbred goats at their first four lactations, respectively while birth rates, litter size at birth and litter size at weaning were 90.9%, 94.2%, 94.4%, 88.7%, 95.9%, 95.2% and 90.0%; 1.11, 1.18, 1.24, 1.38, 1.28,1.28 and 1.42; 0.93, 0.97, 1.04, 1.06, 1.01, 1.03 and 1.03 for Hair, AHF1, AHF2, AHB1, SHF1, SHF2 and SHB1 crossbred goats their first two lactations, respectively. At the lactation milk yields, lactation lengths and average daily milk yields of Hair, AHF1 and SHF1 crossbred goats at first four lactations were 220.9 kg, 297.1 kg and 323.2 kg; 212.1 days, 222.3 days and 223.8 days; 1.039 kg, 1.334 kg and 1.442 kg respectively. The lactation milk yields, lactation lengths and average daily milk yields of Hair, AHF1, AHF2, AHB1, SHF1, SHF2 and SHB1 crossbred goats at first two lactations were 203.2 kg, 264.5 kg, 251.8 kg, 283.2 kg, 287.2 kg, 255.0 kg and 292.3 kg; 210.6 days, 220.6 days, 214.8 days, 221.3 days, 221.6 days, 214.3 days and 224.5 days; 0.960 kg, 1.197 kg, 1.169 kg, 1.280 kg, 1.293 kg, 1.191 kg and 1.301 kg respectively. Average milk fat, protein, lactose, milk solid percentages and total fat and protein yields of Hair, AHF1 and SHF1 crossbred goats at their first four lactations were 5.15%, 4.82% and 4.80%; 4.01%, 3.87% and 3.84%; 5.51%, % 5.31 and 5.31%; 15.28%, 14.71% and 14.6%; 11.13 kg, 13.83 kg and 15.13 kg; and 8.87 kg, 11.48 kg and 12.38 kg respectively. The same parameters for Hair, AHF1, AHF2, AHB1, SHF1, SHF2 and SHB1 goats at their first two lactations were 5.25%, 5.08%, 4.74%, 4.83%, 4.93%, 4.84% and 4.57%; 4.07%, 3.95%, 3.94%, 3.85%, 3.89%, 3.89% and 3.84%; 5.60%, 5.37%, 5.32%, 5.26%, 5.37%, 5.31% and 5.17%; 15.50%, 15.11%, 14.75%, 14.72%, 14.83%, 14.81% and 14.47%; 10.35 kg, 13.17 kg, 11.63 kg, 13.54 kg, 13.93 kg, 12.17 kg and 13.31 kg; 8.31 kg, 10.42 kg, 9.94 kg, 10.93 kg, 11.14 kg, 9.93 kg and 11.22 kg respectively. Heritability estimates of the litter size at birth and litter size at weaning were 0.08 and 0.14, respectively for the goats at their first four lactations, while the repeatability estimates of the litter size at birth and litter size at weaning were 0.35 and 0.49, respectively. The same parameters for the goats at their first two lactations were 0.17 and 0.22; 0.32 and 0.41, respectively. Heritability estimates ranged from 0.18 to 0.32 for the milk yields, 0.10 to 0.16 for lactation length, 0.24 to 0.45 for fat percent, 0.43 to 0.54 for protein percent, 0.18 to 0.38 for fat yield, 0.21 to 0.51 for protein yield. Repeatability estimates varied from 0.26 to 0.51 for milk yield, 0.12 to 0.61 for lactation length, 0.24 to 0.79 for fat percent, 0.45 to 0.62 for protein percent, 0.20 to 0.63 for fat yield, 0.26 to 0.60 for protein yield. The estimated heritability for birth weight, live weights at two months of age, at three months (weaning) of age and at six months of age of the kids that were born from the goats at their first four lactations were 0.33, 0.26, 0.30 and 0.35. The estimated heritability for those were born from the goats at their first two lactations was 0.25, 0.24, 0.22 and 0.32 respectively.
It is concluded that the milk yield traits of Hair goats can be improved substantially through improving the husbandry and feeding conditions by applying an appropriate selection program and crossbreeding scheme.
Affiliation and Awarding Institution: Selcuk University
Corresponding E-mail address: herduran42@hotmail.com
Availability of full Thesis: http://acikerisimarsiv.selcuk.edu.tr:8080/xmlui/handle/123456789/6168
Corresponding E-mail address: herduran42@hotmail.com
Availability of full Thesis: http://acikerisimarsiv.selcuk.edu.tr:8080/xmlui/handle/123456789/6168
Abstract published July 2021.
