Judul: Studi Pewarisan Dan Identifikasi Primer Rapd Terkait Karakter Ketenggangan Terhadap Aluminium Pada Padi (Oryza sativa L.)
Abstrak: Tanah masam dengan kandungan aluminium tinggi berpengaruh nyata terhadap morfologi maupun produksi padi. Dalam rangka mempercepat proses seleksi dalam pemuliaan padi tenggang AI, perlu dipahami pola pewarisan karakter ketenggangan terhadap AI. Selain itu, penelitian ini dilakukan untuk memperoleh kandidat primer RAPD terkait karakter ketenggangan terbadap AI.
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Judul: Pewarisan Sifat Ketenggangan Aluminium Pada Padi Gogo (Oryza Sativa L.) di Kultur Hara
Abstrak: percob- ini dilaksanakan untuk mempelajari pewarisan sifat ketenggangan terhadap Al pada padi gogo dengan mengamati pertumbuhan akar pada keadaan tercekam Al. Pendugaan pola pewarisan dilakukan dengan melihat pola sebaran enam generasi hasil persilangan tetua terpilih, nilai ragam tiap karakter, aksi gen yang mengendalikan sifat ketenggangan padi gogo terhadap cekaman A1 dan nilai heritabilitas arti Iuas dan arti sempit. Enam generasi hasil persilangan Banih Kuning yang tenggang A1 dengan Jatiluhur yang peka A1 digunakan untuk mempelajari pola pewarisan sifat ketenggangan terhadap cekaman Al. Karakter yang diamati antara lain adalah panjang akar, nisbah panjang tajuk-akar, nisbah bobot tajuk-akar dan bobot total. Tanaman ditumbuhkan di kultur hara Yoshida dengan konsentrasi A1 45 ppm selama 14 hari.
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Judul: Distribution and Diversity of Ectoparasite Mites on Geckos in Indonesia
Abstrak: Data on the diversity and dispersal of parasitic mites on house geckos in Indonesia are very scarce. In this work, the distribution and diversity of mites living on three species of house geckos, namely Cosymbotus platyurus, Hemidactylus frenatus, and H. garnotii collected throughout Indonesia, has been elaborated. Geckos and mites were captured and immediately preserved in 70% ethanol. Whole mount of the mites was prepared by clearing in lactophenol followed by mounting on polyvinyl lactophenol solutions. The SEM preparation was conducted to examine the detail morphological characters of the mites. The results showed that among 448 individuals of geckos, 221 geckos were infected by Geckobia mites. Prevalences of C. platyurus, H. frenatus, and H. garnotii infested by mites were 14.8%, 50.69%, and 79.6%, respectively. Three different spesies of Geckobia (G1, G2, and G3) could be differentiated; and based on similarities of their morphological characters to ones described in published literatures, Geckobia G2 is Geckobia glebosum and Geckobia G3 is Geckobia bataviensis while G1 could not be identified to the species level. The highest mean intensity of Geckobia G1 infestation was found on H. garnotii (I=7.0), G. glebosum infestation on H. frenatus (I=3.5), and G. bataviensis infestation on H. garnotii (I=11.8). In general, C. platyurus was infested by the least number of mites. Geckobia G1 were found living on the skin folds on the claws, G. glebosum were found mainly on the body and thigh, and G. bataviensis were found on almost all parts of the host’s body. Geckobia mites are distributed randomly throughout Indonesian Archipelago, following the pattern of distribution of their hosts. So it is concluded that Geckobia G1, G. glebosum, and G. bataviensis are sympatric.
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