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All Journal AGROEKOTEKNOLOGI Fruitset Sains : Jurnal Pertanian Agroteknologi Jurnal Kajian dan Inovasi Ilmu (JKII) Biodiversitas Journal of Biological Diversity
Gali Rakasiwi
Universitas Al Azhar Medan, Indonesia
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Education Languange, Linguistic, Communication & Media Social Sciences Other

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Karakter Komponen Hasil Dan Parameter Genetik Pada Generasi M3 Rosella Gali Rakasiwi; Diana Sofia Hanafiah; Rosmayati Rosmayati
Jurnal Agroekoteknologi Vol 7, No 2,April (2019)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (482.398 KB) | DOI: 10.32734/jaet.v7i2,April.21206

Abstract

Penelitian ini bertujuan untuk mendapatkan komponen hasil dan parameter genetik pada generasi M3 rosella (Hibiscus sabdariffa L.). Penelitian ini dilakukan di Fakultas Pertanian USU, Medan dengan ketinggian tempat 32 m diatas permukaan laut dimulai dari bulan Desember 2017 sampai Mei 2018. Penelitian ini menggunakan benih populasi mutan generasi M3 yang berasal dari varietas Roselindo 2 yang telah diiradiasi sinar gamma pada penelitian sebelumnya. Data yang didapatkan diuji dengan menggunakan analisis uji-t. Parameter yang diamati adalah persentase perkecambahan, tinggi tanaman, jumlah cabang, diameter kanopi, diameter kelopak bunga, bobot buah per tanaman, bobot kelopak bunga per tanaman, jumlah kelopak bunga per tanaman, umur berbunga dan umur panen. Hasil penelitian menunjukkan bahwa adanya perbedaan komponen hasil pada karakter pengamatan yaitu bobot kelopak bunga dan jumlah kelopak bunga pada populasi kontrol dibandingkan populasi 450 Gy
Pemanfaatan Ekstrak Limbah Buah Nanas dan Belimbing Wuluh sebagai Koagulan Alami pada Pengolahan Lateks Karet Gali Rakasiwi; Andi Setiawan; Pahala L. L. Sianturi; Swati Sembiring
Jurnal Kajian dan Inovasi Ilmu (JKII) Vol. 2 No. 1 (2026): Mei
Publisher : Marasofi International Media and Publishing (MIMP)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.64123/jkii.v2.i1.5

Abstract

Penelitian ini dilatarbelakangi oleh penggunaan koagulan kimia pada pengolahan lateks karet yang mahal dan berpotensi mencemari lingkungan, sehingga diperlukan alternatif koagulan alami berbasis limbah organik. Penelitian ini bertujuan untuk menganalisis efektivitas ekstrak limbah buah nanas (Ananas comosus) dan belimbing wuluh (Averrhoa bilimbi) sebagai koagulan alami pada lateks karet (Hevea brasiliensis). Metode penelitian menggunakan Rancangan Acak Lengkap (RAL) faktorial dengan dua faktor, yaitu jenis koagulan dan variasi dosis. Parameter yang diamati meliputi waktu koagulasi, berat basah, berat kering, dan kadar karet kering. Hasil penelitian menunjukkan bahwa kedua ekstrak berpengaruh signifikan terhadap waktu koagulasi serta berat basah dan kering, namun tidak berpengaruh nyata terhadap kadar karet kering. Ekstrak nanas dosis 50 mL memberikan waktu koagulasi tercepat, sedangkan belimbing wuluh dosis 25 mL menghasilkan kadar karet kering tertinggi. Kesimpulannya, kedua limbah buah tersebut efektif sebagai koagulan alami dan berpotensi menggantikan koagulan kimia. Disarankan pemanfaatan lebih lanjut pada skala lapangan untuk mendukung industri karet berkelanjutan dan ramah lingkungan.
Identification and characterization of corn plants for downy mildew resistance in North Sumatra, Indonesia DIANA SOFIA HANAFIAH; SYAMSAFITRI SYAMSAFITRI; MARIATI MARIATI; CHAIRANI HANUM; MUHDI MUHDI; GALI RAKASIWI; M. HAFAZH ABDURRAHMAN; M. AMIN NUR; DINA SAHTIKA
Biodiversitas Journal of Biological Diversity Vol. 26 No. 5 (2025)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d260511

Abstract

Abstract. Hanafiah DS, Syamsafitri, Mariati, Hanum C, Muhdi, Rakasiwi G, Abdurrahman MH, Nur MA, Sahtika D. 2025. Identification and characterization of corn plants for downy mildew resistance in North Sumatra, Indonesia. Biodiversitas 26: 2130-2138. The collection of germplasm determines the success of variety assembly. The genetic material contained in the germplasm has a strategic meaning in the assembly or improvement of varieties. This study aims to identify the kinship between morphological characteristics of individual corn plants. This study was conducted in Karo and Dairi Districts, North Sumatra, Indonesia from July-August 2024. Identification and plant characterization are carried out to preserve germplasm, which is the initial stage in breeding activities, especially in local germplasm. Characterization was carried out on corn genotypes in several villages in two districts in North Sumatra. The survey method used plant descriptors from the International Union for the Protection of New Varieties (UPOV) guide with a purposive method for determining the location and sampling technique. A total of 26 corn plant cultivars were studied. The result showed that based on the cluster method (grouping) of morphological characteristics, 3 groups were formed. The differences include stem color, leaf angle and ear tip shape. The closest cultivars are cultivars 14 and 16 from Kuta Tengah Village, Siempat Nempu Hulu Sub-district. The results of the characterization and identification of corn plants did not find any downy mildew attacks in Karo and Dairi Districts. The implication of this research is information on the diversity of corn germplasm and for the next stage the utilization of germplasm for corn plant breeding programs in North Sumatra.
POPULATION OF POLLINATING INSECTS (Elaeidobius kamerunicus Faust) ON OIL PALM PLANTS IN SIMALUNGUN REGENCY NORTH SUMATRA Eka Bobby Febrianto; Chairul Maulana Nasution; M. Yusuf Dibisono; Gali Rakasiwi
Fruitset Sains : Jurnal Pertanian Agroteknologi Vol. 14 No. 1 (2026): April: Ilmu Pertanian dan Bidang Terkait
Publisher : Institute of Computer Science (IOCS)

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The population of the oil palm pollinating beetle, Elaeidobius kamerunicus Faust, is an important biological indicator for assessing the adequacy of pollination and fruit set formation in oil palm plantations. This study aimed to measure the population and sex ratio of E. kamerunicus on male oil palm flowers in the anthesis phase from two planting years, namely 2013 and 2016. The study was conducted at PT. Perkebunan Nusantara IV Regional II, Afdeling VI, located in Dolok Batu Nanggar Subdistrict, Simalungun Regency, North Sumatra Province. The study took place from June to September 2023. It employed a survey method, and no experimental treatments were applied. Data analysis utilized descriptive statistics (mean and standard deviation) as well as Welch’s t-test to compare the two planting years. The results showed that the 2016 growing season had a slightly higher number of male inflorescences per observation plot, while the 2013 growing season had a significantly higher number of grains per panicle and a significantly higher estimated population of E. kamerunicus. The average population in the 2013 growing season reached 29,017.69 adult individuals ha?¹, whereas in the 2016 growing season, the average was 19,098.41 adult individuals ha?¹ and slightly below the commonly used minimum threshold of approximately 20,000 adult individuals ha?¹. The sex ratio was dominated by females in both growing seasons, with no significant difference between them.
Co-Authors Andi Setiawan CHAIRANI HANUM Chairul Maulana Nasution DIANA SOFIA HANAFIAH Diana Sofia Hanafiah DINA SAHTIKA Eka Bobby Febrianto, Eka Bobby M. AMIN NUR M. HAFAZH ABDURRAHMAN M. Yusuf Dibisono Mariati Ferry Ezra T. Sitepu Mariati* Afifa Ulfa Batubara MUHDI MUHDI Pahala L. L. Sianturi Rosmayati Rosmayati Swati Sembiring SYAMSAFITRI SYAMSAFITRI