Judul: Genetic distance analysis based on ssrs and morphological marker and combining ability analysis for sweet corn development (Zea mays L. Var. Saccharata) hybrid.
Abstrak: The objective of the research were to grouping sweet corn lines resistant to downy mildew, high specific and general combining ability and high heterosis to select parental line to breed single cross hybrid of sweet corn. The first research was done to study genetic variability of 39 sweet corn lines based on SSR and morphological marker to select good parental lines of hybrid sweet corn. There were high genetic variability among genetic material, showed by genetic distance value about 0.18 to 0.78, indicates wide genetic variability of sweet corn. The results shows that among 20 lines having genetic similarity between 0.25 – 0.82 or genetic distance from 0.18 to 0.75; based on morphological trait 0.27 – 1.00. Correlation value between similarity matrix based on SSR and morphology was high on 0.88 of goodness of fit criteria. The aim of second research was to study general combining ability of sweet corn lines for yield and resistant to downy mildew for hybrid varieties improvement. Six of 45 lines having high fresh ear yield per plot and best general combining ability, such as Mr4/SC/BC4-2-1B, Mr4/SC/BC4-6-1B, Mr11/SC/BC4-2-1B, Mr11/SC/BC4-4-1B, Mr12/SC/BC4-6-1B, and Mr12/SC/BC3-3-1B. All of testing lines have resistance to downy mildew with severity about 0.0 to 7.1%. The lines having high GCA value would be good combiner to other lines to develop high yielding hybrid sweet corn and resistant to downy mildew. The third research was done to study general and specific combining ability of sweet corn lines and higher heterosis of downy mildew resistance supporting the hybrid corn development. The combination of A x D lines (Mr12/SC/BC4-6-1B x Mr11/SC/BC4-2-1B) were medium genetic distance and having highest GCA, heterosis and heterobeltiosis for fresh ear yield per plot character. The D x C combination (Mr11/SC/BC4-2-1B x Mr4/SC/BC4-2-1B) have wide genetic distance and high fresh ear yield per plot, heterosis and heterobeltiosis, but have negative SCA value. The combination of E x C (Mr12/SC/BC3-3-1B x Mr4/SC/BC4-2-1B) have a wide genetic distance but low productivity. The best hybrid is not always obtained from parents with the high genetic distance, but also can be obtained from the low or medium genetic distance as well.
Keyword: Hybrid sweet corn, Zea mays L. var. saccharata, Genetic variability

Judul: Evaluasi daya gabung dan heterosis jagung manis (Zea mays L. var. saccharata)
Abstrak: The aims of this research were to estimate the values of general combining ability, specific combining ability and heterosis in sweet corn using a half dialel mating design. There were 7 inbreds, 21 hybrids, and 2 checks varieties (Bonanza and SG 75) used in this research. This research was conducted in Leuwikopo experimental station Dramaga Bogor, from November 2014 to January 2015. The experimental design was a randomized complete block design with 3 replicates. General combining ability values were estimated by Griffing II method. Heterosis were calculated based on mid-parent and high-parent values. Inbred JM8-4-3-1- 15-14 has the highest general combining ability in sugar content and yield. Inbred JM14-4-10-10-13-15 has the high general combining ability in ear length and days to harvest. Inbred JM17-6-13-1-12 has highest general combining ability for ear height. Hybrid 17 X 14 has the highest specific combining ability for yield and ear length. High heterosis values for yield and ear length were found in hybrid 17X6 hybrid.
Keyword: Bogor Agricultural University, combining ability, Griffing method, half diale, hybrid

Judul: Iklim Pulau Bali
Abstrak: Curah hujan rata-rata bulanan di Bali berkisar antara 47 mm sampai 327 mm, dengan curah hujan maksimum jatuh pada bulan Januari dan minimum pada bulan Agustus. Total hujan setahun rata-rata di Bali 1901 mm. Pada muim angin barat, curah hujan di utara pegunungan relatif sama dengan di selatan pegunungan, sedangkan pada musim angin timur curah hujan di selatan pegunungan lebih tinggi daripada di utara pegunungan. Isohyet tiap bulan di Bali menunjukkan pengaruh ого- grafis terjadi di bagian timur P. Bali yang mengakibatkan di selatan pegunungan lebih basah daripada di di utara pegunungan selama musim kemarau (monsoon timur). Dari isohyet tersebut dapat juga dilihat bahwa potensi air tertinggi ada di bagian timur P. Bali ini khususnya di bawah kaki G. Agung. Musim angin barat di Bali terjadi pada bulan Desember sampai dengan bulan Maret, dan pada bulan April sampai bulan September merupakan musim angin timur. Musim panca roba terjadi pada bulan Oktober sampai bulan November. ..
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