GENETIC GAIN DAN DIFFERENTIAL SELECTION CALON INDUK NILA PUTIH (Oreochromis sp.) JANTI STRAIN SINGAPURA F5 UMUR 5 BULAN YANG DIPELIHARA DI KOLAM AIR DERAS

• Main Authors: , YULIANA SANTI RAHAYU, , Dr. Ir. Bambang Triyatmo, M.P.
• Format: Theses and Dissertations NonPeerReviewed
• Published: [Yogyakarta] : Universitas Gadjah Mada 2013
• Subjects: ETD
• Online Access: https://repository.ugm.ac.id/120134/; http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=60154
• Institution: Universitas Gadjah Mada

Research has been done to 5 months white tilapia (Oreochromis sp.) breeders of fifth generation (F5) singapore strain (SS) janti. The purpose of this research was to know the genetic gain value of 5 months white tilapia breeders of fifth generation (F5) singapore strain janti compared with fourth generation (F4) and to revealed the differential selection value of 5 months white tilapia breeders of fifth generation (F5) singapore strain janti from average weight of top 100 compared to average weight of the population. The tilapia cultured in running water system for a month. The research performed with 5 months white tilapia breeders of singapore strain (SS) janti through individual selection method (selective breeding). The white tilapia breeders of singapore strain (SS) used in this research consisted of 400 male and 400 female. The selection of the white tilapia was done randomly. Parameter measured included total weight, length, survival rate, feed amount and water quality for culturing. The result showed that the fifth generation (F5) had increasing weight growth of each individual with genetic gain value against the forth generation (F4) was 30,12 % for the male and 27,92 % for female. The genetic gain value was better than several other selective breeding of tilapia before. The top 100 average weight of the 5 months white tilapia breeders of fifth generation (F5) singapore strain janti (184,03 ± 22,87 g to 224,88 ± 24,31 g) was higher than average weight of the population (131,27 ± 38,98 g to 163,31 ± 47,17 g). The differential selection value of white tilapia breeders was 37,70 g for male and 40,19 g for female. The weight of male tilapia population was less various than female ones.