<![CDATA[Perbaikan mutu genetik dan peningkatan kualitas day old chicken (DOC) dapat dilakukan melalui proses seleksi terhadap berat telur tetas. Penelitian bertujuan mengevaluasi berat, daya dan susut tetas telur ayam joper berdasarkan klasifikasi berat telur tetas yang berbeda. Rancangan yang digunakan adalah Rancangan Acak Lengkap (RAL). Perlakuan berdasarkan klasifikasi berat telur yaitu: P0 (Berat Random), P1 (ekstra besar (>60 g)), P2 (besar (56-60 g)), P3 (sedang (51-55 g)), P4 (kecil (46-50 g)), dan P5 (ekstra kecil (<46 g)). Setiap perlakuan terdiri dari 4 ulangan, sehingga diperoleh 20 unit perlakuan dengan variabel yang diamati yaitu daya tetas, berat tetas dan susut tetas. Hasil penelitian menunjukkan persentase daya tetas yang paling tinggi terdapat pada perlakuan P3 (83,69%) berbeda sangat nyata (P<0,01) jika dibandingkan dengan perlakuan lainnya. Rataan berat tetas P1 (>60 g) menunjukkan perbedaan yang signifikan sebesar 46,08 g sedangkan rataan berat tetas terkecil pada perlakuan P5 (33,70 g). Penyusutan telur tetas berada pada kisaran 10,84 – 15,10%, semakin besar berat telur maka persentase susut semakin besar. Perlakuan P1 berat telur mengalami penyusutan selama proses inkubasi berbeda sangat sigifikan (P<0,01) dibandingkan dengan perlakuan lainnya, penyusutan terkecil pada perlakuan P5 sebesar 10,84% tidak berbeda nyata (P>0.01) dengan perlakuan P3 dan P4. Telur dengan kategori berat sedang (51-55 g) merupakan kelompok telur tetas dengan hasil pengamatan terbaik untuk seluruh variabel yang diuji. ABSTRACT Improving genetic quality and the quality of day-old chickens (DOC) can be done through a selection process for the weight of hatching eggs. The research aims to evaluate the weight, power, and hatching losses of Joper chicken eggs based on different weight classifications of hatching eggs. The design used was a Completely Randomized Design (CRD). Treatment based on egg weight classification, namely: P0 (Random Weight), P1 (extra large (>60 g)), P2 (large (56-60 g)), P3 (medium (51-55 g)), P4 (small (46-50 g)), and P5 (extra small (<46 g)). Each treatment consisted of 4 replications so 20 treatment units were obtained with the variables observed, namely hatchability, hatching weight, and hatching loss. The results showed that the highest percentage of hatchability was in the P3 treatment (83.69%) which was very significantly different (P<0.01) when compared to other treatments. The average hatching weight of P1 (>60 g) showed a significant difference of 46.08 g, while the average hatching weight was the smallest in the P5 treatment (33.70 g). The shrinkage of hatching eggs is in the range of 10.84–15.10%, the greater the egg weight, the greater the shrinkage percentage. In treatment P1, egg weight decreased during the incubation process, which was very significantly different (P<0.01) compared to other treatments, the smallest shrinkage in treatment P5 was 10.84%, not significantly different (P>0.01) from treatments P3 and P4. Eggs in the medium weight category (51-55 g) are the group of hatching eggs with the best observation results for all variables tested.]]>
