Judul: Yield evaluation of 17 chili pepper (Capsicum annuum L.) lines in Bogor, West Java.
Abstrak: This yield evaluation research was done to evaluate and select the potential new chili pepper line created by the Plant Breeding Program in the Department of Agronomy and Horticulture of Bogor Agricultural University. The objectives of this research were to evaluate the variability and yield of 17 new lines compared to three commercial varieties, and calculate estimated character broad sense heritability values. This research had been done from November 2011 until May 2012 in Plant Breeding Laboratory, Department of Agronomy and Horticulture, Bogor Agricultural University (IPB) and Leuwikopo Experimental Station, Dramaga (6o56’34’’S, 106o72’56’’E). The genetic materials used in this research were 17 open pollinated chili pepper lines and three commercial varieties. The chili peper lines were IPB 110005-91-13-12, IPB 110005-91-13-4, IPB 110005-91-17-18a, IPB 110005-91-17-3, IPB 110005-91-4-6, IPB 110005-91-4-8, IPB 120005-1-1- 17, IPB 120005-5-11-1, IPB 120005-5-11-2, IPB 120005-5-19-3, IPB 009019-3- 4-10, IPB 009019-3-4-7, Pesona I-1, Pesona I-2, IPB 002046-2-5-8, IPB 002046- 2-14c-14 and IPB 002001-4-3b-5. While the three commercial varieties were Lembang I, Trisula and Tit Super. This research was arranged in Randomized Complete Block Design. It used 20 different chili genotypes with three replications, therefore there were 60 experimental units. Analysis of quantitative data was done by using analysis of variance (ANOVA) and Dunnett test with α = 5%. Estimated broad sense heritability value was also calculated to measure the role of genetic factors in the phenotype. Result showed that genotype had a very significant influence in almost all character, except for the variable of total marketable fruit weight per plant and fruit length. The lines Pesona I-1, Pesona I-2, IPB 110005-91-17-3, IPB 120005- 1-1-17, IPB 120005-5-11-2, IPB 009019-3-4-10 and IPB 110005-91-13-4 are new chili pepper lines that had higher yield than the compared varieties. All of the quantitative character that were observed had high estimated broad sense heritability value. This shows that environmental factors were not as influential as genetic factors in the chili pepper plant phenotype. There are also characters that had positive and significant correlation with chili pepper plant height, fruit length, fruit weight, fruit weight per plant, fruit per plant and potential productivity.
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Judul: Evaluasi Karakter Hortikultura 11 Hibrida Cabai (Capsicum Annuum L.) IPB di Kebun Percobaan IPB Tajur Bogor
Abstrak: Percobaan ini dilakukan untuk mengidentifikasi hibrida-hibrida cabai yang mempunyai daya adaptasi yang baik terutama di dataran rendah dan berdaya hasil lebih baik dari varietas yang sudah ada. Percobaan dilaksanakan di Kebun Percobaan IPB Tajur II Bogor pada bulan Desember 2006-Mei 2007. Percobaan menggunakan rancangan kelompok lengkap teracak satu faktor dengan 11 hibrida cabai dan 5 pembanding sebagai perlakuan yang diuIang sebanyak tiga kali. Hibrida yang digunakan adalah IPB CH 1, IPB CH2, IPB 3l, IPB CH4, IPB CH5, IPB CH6, IPB CH19, IPB CH25, IPS CH28, IPS CH50, dan IPB CH51 sedangkan pembanding yang digunakan adalah Biola, Gada, Hot Beauty, Imperial dan Adipati. HasiI percobaan menunjukkan babwa hibrida-hibrida yang diuji memiliki perbedaan pada karakter kuantitatif rase generatif (umur berbunga, umur panen, panjang buah dan bobot buah). Hibrida IPB CH4 memiliki keunggulan pada karakter umur mulai berbunga dan tingkat kepedasan IPB CH19 memiliki keunggulan pada karakter umur mulai panen dan ketahanan terbadap antraknosa IPb CH51 memiliki keunggulan pada karakter bobot buah dan panjang buah.
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Judul: Ongkos irregularitas sebuah graf
Abstrak: Tulisan ini mengkaji bagaimana cara mcngubah sualu graf menjadi graf yang irregular, yaitu dengan menambahkan beberapa edge pacta graf asal. Untuk sebuah graf G, didefinisikan ongkos irregularitas ic(G) yaitu jumlah minimum tambahan edge sedemikian sehingga menjadi Multigraf H yang merupakan multigraf G irregular. Akan ditentukan ongkos irregularitas dari graf regular, graf mendekati regular, dan graf mendekati irregular.
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