Judul: Observation Trial of Sunflower (Helianthus annuus L.) IPB Plant Breeding Genotypes for Variety Release
Abstrak: Ketersediaan varietas unggul bunga matahari (Helianthus annuus L.) masih sangat rendah di Indonesia. Pemuliaan tanaman merupakan salah satu cara untuk mengembangkan varietas dengan karakter yang diinginkan. Penelitian ini bertujuan meneliti karakter unggul dua genotipe bunga matahari hasil pemuliaan dan mengamati karakter kuantitatif dan kualitatifnya. Penelitian ini dilakukan pada bulan Januari hingga Juni 2021 di Kebun Percobaan Lewikopo IPB, Bogor. Rancangan percobaan yang digunakan adalah Rancangan Kelompok Lengkap Teracak (RKLT) dengan faktor tunggal yaitu genotipe tanaman yang terdiri atas dua genotipe yang diuji yaitu genotipe Kanigara dan genotipe Helina dan dua genotipe pembanding yaitu genotipe IPB BM1 dan genotipe Texas Lemon. Hasil analisis ragam keempat genotipe bunga matahari menunjukkan bahwa genotipe berpengaruh sangat nyata pada seluruh karakter kuantitatif kecuali diameter bunga tabung pada bunga sekunder dan panjang biji. Genotipe Helina memiliki umur berbunga dan umur panen yang nyata lebih cepat, jumlah bunga di cabang yang nyata lebih banyak dibandingkan genotipe pembanding IPB BM1. Genotipe Helina memiliki ciri khas warna bunga pita kuning dan biji berwarna hitam tanpa strip. Genotipe Kanigara memiliki produktivitas biji dan bobot 100 biji yang nyata lebih tinggi dibandingkan genotipe pembanding dan bijinya berwarna coklat dengan strip., The availability of superior variety of sunflower (Helianthus annuus L.) is still very low in Indonesia. Plant breeding is one way to develop varieties with the desired character. This study aimed to examine the superior characters of two genotypes of sunflowers from breeding treatment and to observe their quantitative and qualitative characters. This research was conducted from January to June 2021 at the Lewikopo Experimental Field, IPB, Bogor. The experimental design used was a Completely Randomized Group Design with a single factor, namely plant genotype. This plant genotype is consisted of two genotypes tested, the Kanigara genotype and Helina genotype, and two comparison genotypes, the IPB BM1 genotype and Texas Lemon genotype. The results of the analysis of variance of the four sunflower genotypes showed that the genotype had a very significant effect on all quantitative characters except the diameter of disk florets in secondary flowers and seed length. The Helina genotype had a significantly faster flowering age and harvesting age, significantly higher number of flowers on the branch than the comparison genotype IPB BM1. The Helina genotype has typical characteristics namely yellow ray florets and black seeds without stripes. The Kanigara genotype has significantly higher yield and weight of 100 seeds than the comparison genotype and has brown seed with stripes.
Keyword: sunflower, plant breeding, qualitative character, quantitative character, superior variety

Judul: Performance evaluation of two IPB sunflower (Helianthus annuus L.) genotypes
Abstrak: Tanaman hias merupakan komoditas dengan prospek penjualan dan nilai komersial tinggi, salah satunya adalah bunga matahari. Bunga matahari (Helianthus annuus L.) merupakan tanaman yang dapat dibudidayakan sebagai penghasil minyak, makanan, dan tanaman hias. Varietas bunga matahari yang dilepas oleh kementerian pertanian masih sangat minim, hal ini mendorong pemulia untuk menciptakan bunga matahari dengan karakter unggul, keragaan unik, dan stabil untuk diupayakan sebagai varietas unggul. Penelitian ini bertujuan untuk mengevaluasi keragaan dari dua genotipe bunga matahari hasil pemuliaan IPB. Penelitian dilaksanakan pada bulan Januari hingga Mei 2021 di Sukowati, Bojonegoro. Penelitian ini menggunakan rancangan kelompok lengkap teracak (RKLT) satu faktor, yaitu genotipe bunga matahari (IPB BM2, IPB BM3, IPB BM1, Texas lemon, dan Choco sun). Lima genotipe bunga matahari yang diamati menunjukkan bahwa genotipe berpengaruh nyata terhadap seluruh karakter kuantitatif. Genotipe uji BM2 dan BM3 memiliki percabangan dan jumlah bunga lebih banyak dengan hari berbunga 63-65 hari, serta memiliki keragaan bunga yang berbeda dengan varietas pembanding, sehingga berpotensi untuk dikembangkan dan diupayakan untuk dirilis sebagai varietas unggul., Ornamental plants are commodities with high sales prospects and commercial value, including sunflower. Sunflower (Helianthus annuus L.) can be cultivated with the purpose for oil production, confectionary, or ornamental plants. The variety of sunflower released by the Ministry of Agriculture is still limited. This encourages breeders to create sunflowers with superior characters, unique and stable performances to be used as superior varieties. This study aimed to evaluate the performance of two sunflower genotypes from IPB Plant Breeding Division. The research was conducted from January to May 2021 in Sukowati, Bojonegoro. This study used a randomized complete block design (RCBD) with one factor, namely sunflower genotypes (IPB BM2, IPB BM3, IPB BM1, Texas lemon, and Choco sun). The results of the analysis of variance toward the five genotypes of sunflower showed that genotype had a significant effect on all quantitative characters. The genotypes of IPB BM2 and IPB BM3 had more branches and flowers blooms with 63-65 days of flowering. They have different flower performances from the comparison varieties. Therefore, they are very potential to be developed and attempted to be released as superior varieties.
Keyword: characterization, morphology, performance, superior varieties

Judul: Hydroxyapatite-Chitosan Composite Coating on Stainless Steel 316 to Improve Corrosion Resistance
Abstrak: Metals that were used in bone implantation should have good corrosion resistance that were not easily corroded when implanted into the body. Metal corrosion resistance of stainless steel 316 can be enhanced through the metal coating by hydroxyapatite-chitosan composite with composition ratio of hydroxyapatite (gram) and chitosan 3% (mL) 0.2:0, 0.2:0.1, 0.2:0.5, 0.2:1.0, and 0.2:1.5. Besides improving the corrosion resistance of metal, the presence of chitosan also maintain the position of hydroxyapatite on metal surfaces. Corrosion resistance increases with increasing amount of chitosan added and the best composition of hydroxyapatite-chitosan composite was 0.2:1.0.
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