Multilocation experiments are the steps to determine the genotype stability being tested. Honey sweet potato is a superior agricultural product from West Java, Indonesia. High yield and sweetness are the important traits of the new honey sweet potato breeding lines. In this study, the sweetness level used was the soluble solid level (°brix). The goals of this study were to determine the effects of genotype by environment interactions (GEIs) and to select for storage root yield stability and sweetness among the new promising honey sweet potato lines. Field trials have been carried out using randomized completed block design, which was repeated thrice for the 16 genotypes, across six locations in West Java, Indonesia. To estimate GEIs, data were analyzed using combined analysis of variance. Storage root yield stability (t/ha) and sweetness (°brix) were estimated using parametric measurements, nonparametric measurements, and GGE biplot. The results showed that the genotype (G), environment (E), and GEIs have significant influences on storage root yield and sweetness. Two genotypes, SP3 and SP16, have been identified as the most stable ones with high yield and sweetness across several locations. These two superior genotypes are recommended as potential new honey sweet potato varieties for West Java, Indonesia.

Usaha pemuliaan tanaman kedelai saat ini sebagian besar berfokus pada identifikasi genotipe dengan hasil biji yang tinggi dan ukuran biji besar. Tujuan dari penelitian ini adalah untuk mengevaluasi kultivar kedelai dan kedelai mutan untuk daya hasil tinggi dan ukuran biji besar. Penelitian ini dilaksanakan dari September 2017 sampai Januari 2018 di Kebun percobaan Ciparanje Fakultas Pertanian UNP AD, Jatinangor , Jawa Barat. Rancangan percobaan yang digunakan adalah Rancangan Acak Kelompok (RAK) yang terdiri dari 20 perlakuan dalam 2 ulangan. Perlakuan terdiri dari 19 genotipe dan 1 kultivar cek. Data dianalisis Sidik Ragam dengan Uji F 5%, nilai beda dengan Uji Dunnet 5%. Hasil penelitian menunjukan bahwa terdapat genotipe-genotipe yang memiliki daya hasil dan ukuran yang lebih tinggi dari kultivar Arjasari. Genotipe 1.18 ; 1.2 ; 23.1;25.10;25.11;31.4;79.11;79.12;79.13;79.4; 85.4 ; 83.39 ; 85.8 ; 8.4 ; 86.9 ; 81.21 memiliki ukuran panjang biji yang lebih tinggi dari Arjasari. Genotipe 1.18 ; 1.2 ; 23.1 ; 25.10 ; 25.11 ; 31.4 ; 79.11 ; 79.4 ; 85.4 ; 83.39 ; 87.12 memiliki ukuran lebar biji yang lebih tinggi dari Arjasari. Genotipe 1.18 ; 1.2 ; 25.11; 79.11 ; 83.39 memiliki ukuran tebal biji yang lebih tinggi dari Arjasari. Genotipe 25.10 ; 25.11 ; 31.4 ; 79.11 ; 79.12 ; 79.4 ; 85.4 ; 83.39 ; 86.9 memiliki bobot 100 biji yang lebih besar dari Arjasari.

Current breeding efforts in soybean largely focus on identifying genotypes with high seed yield and large seed size. Our study applied a mutation using 250 Gy Gamma-Ray Irradiation to soybean cv. Anjasari. The variability in the M1 generation was identified, and the planting was continued to M2 M3, M4, M5 until M6 generation. The objectives of this research were to evaluate mutant lines exhibiting a good performance in yield and morphological characteristics that can support the yield component in M6 generation. This research was conducted from January 2019 to May 2019 at Ciparanje Experiment Station, Faculty of Agriculture, Universitas Padjadjaran, Jatinangor, West Java. The experiment was arranged in a Randomized Completely Block Design with fifteen mutant soybean genotypes as treatments with two replications within each treatment. The results showed several genotypes produced higher yield and better agro-morphological characteristics. The genotypes MR-33, MR-4A, and MR-2A showed significantly higher number of total pods per plant. Meanwhile, the genotypes MR-35A, MR-37, MR-23, MR-36A, MR-3A, MR-29A MR-34A, MR-4A, MR-17, and MR-5A showed a higher value in weight of 100 seeds. The highest yield was observed in MR-29A and MR-23, which then will be used as the genotypes for multilocation test for stability.