Judul: Deteksi gen ketahanan penyakit Hawar Daun Bakteri pada populasi silang ganda F1 (DCF1) padi Ciherang
Abstrak: Xanthomonas oryzae pv. oryzae causes leaf blight has many strains and volatile form a new strain. A result that was initially resistant rice varieties may turn out to be sensitive. Improvement Ciherang using gene pyramiding bacterial leaf blight resistance will carry different resistance and has a broad spectrum. This research aims to detect the 207 individual DCF1 Ciherang results gene pyramiding using SSR markers and STS. Four individuals have acquired genes Xa4+xa5+Xa7+Xa21 that is DCF1Ch|CA-42, DCF1Ch|CA-69, DCF1Ch|CA-162, DCF1Ch|CA-163, 11 individuals have genes xa5+Xa7+Xa21, 46 individuals have xa5+Xa21 gene, 31 individuals have Xa7+Xa21 gene, and 45 individual have genes xa5+Xa7. Agronomic characters panicle number DCF2 Ciherang not significantly different from the parent and panicle length DCF2 Ciherang did not differ significantly with parent. Weight of filled grain DCF2 Ciherang significantly greather than the parent. Weight of empty grains DCF2 Ciherang also significantly different from the parent, greather than elders Code, Angke, Ciherang, and IRBB21.
Keyword: Bogor Agricultural University (IPB), pyramiding genes., rice Ciherang, double cross, bacterial leaf blight

Judul: Identifikasi Gen Xa pada Galur F1 Code x Angke dan Ciherang x IRBB21 serta Uji Patogenitas Padi Galur Isogenik
Abstrak: Developing of Ciherang varieties using bacterial leaf blight resistance genes (Xa genes) and pathogenicity tests using bacterial isolate Xanthomonas oryzae pv. oryzae collections in 2012 from Central Java toward near-isogenic lines (NILs) have not been reported. Transfer of resistance genes in Ciherang varieties did by cross method and molecular marker. Varieties of Angke crossed with Code because each has a Xa gene, namely xa5 and Xa7 gene. While Ciherang crossed with IRBB21 as Xa21 gene donor. Identification of xa5 and Xa7 genes in Code x Angke were resulted 16 lines have those genes. xa5 gene amplified in 213 bp using SSR marker, while Xa7 gene amplified in 294 bp using STS marker. These DNA size are resistant marker. Identification of Xa21 gene in Ciherang x IRBB21 was resulted 21 lines have this gene. Xa21 gene amplified in 1000 bp using STS marker as resistant marker. The result of pathogenicity tests obtained bacterial isolate whose have highest levels of virulence, that is isolate with the code number Xoo12-183 from Duwet Pekalongan.
Keyword: Xa gene, pathogenicity, paddy Ciherang, near-isogenic lines (NILs), molecular marker

Judul: Konstruksi Persamaan Friedmann Alam Semesta Friedmann-Lemaitre-Robertson-Walker Termodifikasi Materi Gelap Superfluida
Abstrak: Kosmologi merupakan salah satu objek kajian dari teori relativitas umum. Salah satu model dalam kosmologi adalah model kosmologi Friedmann. Model kosmologi Friedmann dibangun berdasarkan asumsi bahwa materi dan energi terdistribusi secara homogen dan isotropik di alam semesta. Teori relativitas umum dapat dimodifikasi melalui pendekatan teori materi gelap superfluida (MGS). Persamaan medan Einstein untuk teori MGS dapat dirumuskan melalui prinsip aksi dengan memodifikasi Lagrangian pada aksi teori MGS. Selanjutnya dengan memilih metrik Friedmann-Lemaitre-Robertson-Walker (FLRW) datar dengan indeks kurvatur sama dengan nol, dapat dibangun suatu bentuk persamaan Friedmann yang dimodifikasi teori MGS.
Keyword: kosmologi, teori materi gelap superfluida, persamaan medan Einstein, metrik FLRW, persamaan Friedmann.