Incidence of parthenogenetic development in virgin turkey hen's egg
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Present study was conducted to assess the incidence of parthenogenetic development in BSW turkey eggs. The parthenogenetic eggs (from 30wk virgin turkey hens) and normal fertile eggs (by pen mating) were collected daily set in an incubator at a temperature of 37.5°C and 60% relative humidity. The eggs were broken at periodic intervals (0, 12, 24, 36, 48, 60, 72, 84 and 96 h of incubation) and examined macroscopically to record the parthenogenetic development (Cat-1: organised sheath of cells with intact membrane; Cat-2: unorganised sheath of cells with intact membrane; Cat-3: un-organised sheath of cells dissolve membrane and Cat-4: well formed embryo), diameter and total genomic DNA content of blastodisc/embryo). Cat −1 type development was higher during first 24 h of incubation, whereas, Cat −2 type development was seen from 36 to 84 h of incubation. The Cat −3 and Cat-4 type developments were observed after 60 h of incubation. During first 48 h of incubation Cat-1 and Cat-2 type developments were 19.9 and 3.17%, respectively, while during 48 to 96 h of incubation 8.5, 8.2, 4.6 and 3.25% eggs showed Cat-1, Cat-2, Cat-3 and Cat-4 types of development, respectively. Overall 24% eggs showed posive development. Diameter of blastodisc/embryo was significantly higher in fertile egg compared to parthenogenetic egg after 12 h of incubation. Genomic DNA content was higher in normal fertilized egg as compared to parthenogenetic egg after 36 h of incubation. It was concluded that embryo development was slower in parthenogenetic eggs.
Parthenogenesis, Turkey egg, genomic DNA, macroscopic examination.