Genetic diversity and inheritance of the traits determine the success of the breeding program. Analysis of genetic variability and heritability assist breeders to decide a strategy and appropriate selection criteria that will be used to repair the desired character. The purpose of this study was to obtain information about genetic diversity, heritability and correlation of nine agronomic characters of soybean varieties. The materials were 16 soybean varieties that arranged in a randomized block design with three replications. The results showed that days to flowering, number of branches per plant, number of reproductive nodes, number of unfilled pods per plant, weight of 100 seeds, and grain yield revealed broad GCV (Genetic Coeffiecient of Variance), whereas the days to maturity, plant height, number of pods per plant had a narrow GCV. PCV (Phenotypic Coeffiecient of Variance) value higher than the value of GCV on all the observed characters with a slight difference, except for grain yield. The broad sense heritability varied from low (seed yield), medium (the number of branches, number of reproductive nodes, number of pods and the number of unfilled pods), and high (days to flowering, days to maturity, plant height, and weight of 100 seeds). Characters of days to flowering and weight of 100 seeds are effectively used as selection criteria because they had a broad GCV and high heritability. Correlation of all yield components to the seed yield was not significant, and negatively correlated to weight of 100 seeds. Variety with higher plant height tended to have a higher number of branches, reproductive nodes and filled pod per plant.

Abstract. Kuntyastuti H, Sutrisno. 2017. Effect of manure, Phosphate Solubilizing Bacteria, and chemical fertilizer application on the growth and yield of soybean. Nusantara . This study aimed to determine the dosages of organic, chemical and biological fertilizers for optimum growth and yield of soybean grown in acidic dryland. Treatments applied were twelve combinations of inorganic fertilizer, phosphate solubilizing bacteria (PSB), and manure. These treatments were arranged in a randomized block design, each was three replicates. The growth variables of plant height and chlorophyll index were observed in every two weeks interval, started at two weeks after planting. Root length and number of nodules were observed at 45 days after planting when the maximum vegetative growth occurred. Stem and root dry weight, number of filled and empty pods, pod dry weight, grain weight, and number of seeds per plant were observed at harvest. Optimum soybean growth and yield were achieved when soybean plants were treated with a combination of 1500 kg ha -1 of manure + PSB +150 kg ha -1 of NPK chemical fertilizer.Keywords: Chemical fertilizer, dry acid soil, manure, phosphate solubilizing bacteria, soybeanAbbreviations: NPK = nitrogen, phosphate, potassium, PSB = Phosphate solubilizing bacteria, DAP = day after planting, WAP = week after planting, LCI = leaf chlorophyll index, CEC = cation exchange capacity

Abstract. Kuswantoro H, Artari R, Iswanto R, Imani H. 2020. Family structure of F5 soybeans lines derived from soybean varieties with the main differences in seed size and maturity traits. Biodiversitas 21: 2576-2585. The success of breeding programs depends on the availability of genetic resources with high genetic diversity. Genetic diversity plays a role in relationship between genotypes or within a group of genotypes. Seed size and the days to maturity are the main traits to develop a new superior variety for better seed quality and quantity. The plant materials consisted of eight F5 families originating from a combination of crossbreeding between four Korean soybean varieties (Daehwang, Daemang, Daewon, and Songhak) and two Indonesian soybean varieties (Argomulyo and Lawit). The main traits of four Korean soybean varieties are similar to each other, i.e. large seed size and early maturity. The two Indonesian soybean varieties differ on seed size and maturity. Argomulyo has a large seed size and early maturity, while Lawit has a small seed size and late maturity. Agronomic data, such as days to 50% flowering, days to maturity, days to harvesting, plant height, number of branches, number of reproductive nodes, number of filled pods, number of unfilled pods, seed yield per plant, 100 seeds weight, and seed yield per plot, were analyzed using R programs to form the groups. The grouping was based on principal component analysis. The results showed that the family structure of a cross was determined by the characteristics of the crossed genotypes. The family structures with Argomulyo as male parents were more influenced by 100 seeds weight, while the family structures with Lawit as male parents were more influenced by days to maturity. No family structure was formed with a large seed size on crossing with Lawit as the male parent. In this population, high seed yield as the main target of plant breeding was obtained on crossing of Daemang with Lawit.

<p style="margin-left: 0cm; margin-right: 0cm; text-indent: 0.5cm; margin-top: 0.05cm; margin-bottom: 0.1cm; line-height: 100%;" lang="id-ID"><span style="font-family: Souvenir Lt BT,serif;"><span style="font-size: small;">Intensitas cahaya merupakan salah satu variabel lingkungan yang menjadi faktor utama dalam menentukan pertumbuhan dan perkembangan tanaman. Cahaya merupakan sumber daya yang sering menjadi pembatas pertumbuhan tanaman, ketika kebutuhan air dan nutrisi terpenuhi. Hasil kedelai di bawah naungan dapat dimaksimalkan dengan penggunaan varietas yang sesuai. Penelitian bertujuan untuk mengetahui respons galur-galur kedelai (<em>Glycine max</em> L.)terhadap naungan. Penelitian dilaksanakan di Kebun Percobaan Kendalpayak, Malang pada bulan Februari-Juni tahun 2014 dan 2015, menggunakan 21 galur dan satu varietas pembanding (Grobogan) untuk pengujian tahun 2014 dan dua varietas pembanding (Dena 1 dan Dena 2) untuk tahun 2015. Penelitian dilaksanakan pada dua lingkungan, yaitu tanpa naungan (L0) dan naungan 50% (L1). Rancangan acak kelompok tiga ulangan digunakan di setiap lingkungan. Hasil penelitian menunjukkan bahwa setiap genotipe memberikan respons berbeda terhadap lingkungan. Terdapat satu genotipe yang konsisten terpilih pada tahun 2014 dan 2015, yaitu K-453 dengan bobot biji 14,09 dan 11,33 g/tanaman. Berdasarkan nilai Indeks Toleransi Cekaman (ITC) terpilih lima genotipe dengan nilai ITC lebih tinggi daripada varietas Dena 1 (0,95), yaitu K-110, K-254, K-460, K-453, dan K-455, dengan nilai ITC berturut-turut 1,06, 1,01, 1,02, 1,10, dan 1,31</span></span></p>

ABSTRAKPengembangan kedelai pada pola tumpang sari merupakan salah satu peluang yang patut dikembangkan sebagai salah satu upaya peningkatan areal tanam kedelai yang semakin berkurang. Sementara itu, respons setiap varietas kedelai terhadap pola tumpang sari berbeda sehingga diperlukan varietas kedelai yang sesuai atau adaptif dengan lingkungan tumpang sari. Oleh karena itu, dilakukan penelitian yang betujuan untuk mengetahui respons genotipe kedelai sebagai tanaman sela pada tumpang sari dengan ubi kayu. Penelitian dilaksanakan di Kebun Percobaan Jambegede, Malang pada bulan Februari−Desember 2018, pada dua lingkungan, yaitu tumpang sari (L1) dan monokultur (L2), dengan dua waktu tanam, yaitu tiga minggu setelah tanam ubi kayu (T1) dan 4 bulan setelah tanam ubi kayu (T2). Bahan yang digunakan adalah 12 galur harapan dan tiga varietas pembanding (Dena 1, Dena 2, dan Grobogan). Penyusunan perlakuan di masing-masing lingkungan didasarkan pada Rancangan Acak Kelompok yang diulang tiga kali. Hasil penelitian menunjukkan bahwa respons masing-masing genotipe yang diuji sebagai tanaman sela pada tumpang sari dengan ubi kayu adalah beragam, bergantung pada waktu tanam kedelai. Genotipe kedelai GH-5 dan GH-6 sesuai untuk tanaman sela pertama (T1), sedangkan GH-3 sesuai sebagai tanaman sela kedua (T2) pada tumpang sari ubi kayu+kedelai, dengan nilai indeks toleransi terhadap cekaman (ITC) lebih tinggi dan indeks sensitivitas tertimbang (IST) lebih rendah dibandingkan dengan genotipe lain yang diuji. Berdasarkan rasio kesetaraan lahan (RKL), tumpang sari ubi kayu dengan genotipe kedelai GH-5, GH-6, atau GH-3 tergolong menguntungkan (RKL>1,0). Kata kunci: indeks toleransi terhadap cekaman, indeks sensitivitas tertimbang, rasio kesetaraan lahanABSTRACT Soybean development to intercropping is one of the opportunities to increase soybean planting area. Each soybean variety has different responses to intercropping so it is required to study soybean varieties that are suitable or adaptive to intercropping environments. Therefore, a research was conducted to determine the response of soybean genotypes in intercropping with cassava. The research was conducted at the Jambegede Research Station, Malang in February to December 2018, in two environments, namely intercropping (L1) and monoculture (L2), with two planting times, namely three weeks (T1) and 4 months (T2) after cassava planting. Twelve promising lines and three varieties (Dena 1, Dena 2, and Grobogan) were used as research materials. A completely randomized block design with three replications was used to arrange the treatments in each environment. The results showed that the responses of each soybean genotype tested as intercrops on intercropping system with cassava were varied, depending on the soybean planting time. GH-5 and GH-6 soybean genotypes are suitable for the first intercrop (T1), while GH-3 are suitable as the second intercrops (T2) in intercropping system with cassava + Soybean, with higher stress tolerance index (STI) and lower weighted sensitivity index (WSI...