Judul: Pendugaan Parameter Genetik dan Seleksi pada Populasi Bersegregasi Padi.
Abstrak: Demand of rice will continue to increase in line with increases of population and consumption of rice per capita, but the production of rice continually decrease due to land conversion and environmental conditions. The increases of rice production is needed to fulfill national rice consumption. Growing high-yielding varieties is an alternative to improve rice production. The research aimed to estimate the genetic parameters, studied the genes action based on distribution F2 population, and to get a character selection that can be used to calculate the value of differential selection at the F2 population. The experiment was conducted at Leuwikopo experimental field from November 2014 until April 2015. The study used a „single plant‟ method that growing all crops in the experiment field without any replication. The results of mean calculation showed some character of F2 population have better mean value than parental lines. Most of the characters were observed have a high level of diversity caused by segregation of additive, dominant and epistasis genes. The characters of filled grain number panicle-1, unfilled grain number panicle-1, total grain number panicle-1, filled grain weight plant-1, unfilled grain weight plant-1 and total grain weight plant-1 was observed have high estimates of broad sense heritability and coefficient of genetic diversity, so the character is more affected by genetic factors and can be used as one of determination of the selection criteria. The whole character correlated positively to the yield, except for unfilled grain number panicle-1 and unfilled grain weight plant-1. Selection process is based on the character of filled grain weight plant-1, because it has a high broad sense heritability, high coefficient of genetic diversity, correlated positively with almost all the characters, and there are many additive genes of the chara
Keyword: coefficient of genetic diversity, corelation, gene action, heritability, rice

Judul: Keragaman Populasi F2 Padi (Oryza sativa L.) pada Kondisi Cekaman Suhu Tinggi.
Abstrak: Pemanasan global menyebabkan dampak negatif, antara lain menurunkan produktivitas padi. Pemuliaan tanaman diharapkan mampu menghasilkan varietas baru tanaman padi yang toleran terhadap cekaman suhu tinggi. Tujuan penelitian ini adalah untuk mendapatkan informasi tentang keragaan karakter pertumbuhan serta keragaman genetik karakter agronomi genotipe F2 padi dan seluruh tetuanya pada kondisi cekaman suhu tinggi. Penelitian dilaksanakan dari bulan Februari sampai Juni 2015. Materi genetik yang digunakan adalah 150 individu segregan F2 yang berasal dari persilangan IPB 4S dan IR64, 20 individu tetua IPB 4S, 20 individu tetua IR64. Semua materi genetik ditanam dalam kondisi tercekam suhu tinggi di rumah kaca Institut Pertanian Bogor. Hasil perhitungan nilai tengah menunjukkan beberapa karakter memiliki nilai tengah lebih baik dibandingkan tetua dan terdapat segregan transgresif. Karakter agronomi yang diamati dikendalikan oleh gen aditif, dominan, epistasis duplikat, dan epistasis komplementer. Berdasarkan nilai heritabilitas yang tinggi dan koefisien keragaman genetik yang luas maka karakter panjang malai, persentase gabah bernas per malai, dan bobot gabah per malai contoh dapat dijadikan kriteria seleksi untuk seleksi generasi awal pemuliaan padi toleran cekaman suhu tinggi. Seleksi langsung berdasarkan bobot gabah bernas per tanaman dengan intensitas 50% menghasilkan diferensial seleksi 22,1% pada karakter bobot gabah bernas per tanaman.
Keyword: aksi gen, heritabilitas, koefisien keragaman genetik, seleksi, suhu tinggi

Judul: Infeksi Cacing Jantung Dirofilaria Immitis, Railliet & Henry, 1911 Pada Anjing
Abstrak: Cacing Dirofilaria immitis dewasa yang tinggal dalm ventrikel kanan jantung anjing, sering kali menimbulkan gejala klinis yang cukup berat. Cacing Tersebut menghasilkan mikrofilaria yang selanjutnya berkembang menjadi larva infektif dalam saluran malphigi induk semang entara, yaitu nyamuk dari genus Culex, Aedes dan Anopheles.
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