Judul: Identification and seed genetic purity assessment of hybrid rice using microsatellite marker
Abstrak: production of hybrid rice. Hybrid seed often contaminated by crosses derived pollen from other varieties or the occurrence of selfing resulting from impurity parental line (Cytoplasmic Male Sterile). The objective of this study was to identify informative microsatellite marker (SSR) capable to distinguish hybrid rice parental lines and their utilization in seed purity assessment and to characterize the morphology of F1 hybrid rice to complement description of varieties. This study divided in two main activities: 1) identification of informative SSR markers capable of distinguishing hybrid rice parental line and 2) seed purity assessment based on SSR marker and morphological characteristics. Parental lines of five hybrids rice were used to identify the informative SSR marker and two hybrids (Hipa 6 and Hipa 7) used for purity assessment. Seven out of sixteen SSR markers produced polymorphic band and six markers capable to distinguish parental line of five hybrid rice. Microsatellite marker RM346 was specific used for testing genetic purity of Hipa 6 and RM206 for Hipa 7. This study showed that SSR markers were more reliable for assessing genetic purity compare to morphological characteristic.
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Judul: Identification and seed genetic purity assessment of hybrid rice using microsatellite marker
Abstrak: Ensuring the genetic purity of hybrid seed is a prerequisite for successful production of hybrid rice. Hybrid seed often contaminated by crosses derived pollen from other varieties or the occurrence of selfing resulting from impurity parental line (Cytoplasmic Male Sterile). The objective of this study was to identify informative microsatellite marker (SSR) capable to distinguish hybrid rice parental lines and their utilization in seed purity assessment and to characterize the morphology of F1 hybrid rice to complement description of varieties. This study divided in two main activities: 1) identification of informative SSR markers capable of distinguishing hybrid rice parental line and 2) seed purity assessment based on SSR marker and morphological characteristics. Parental lines of five hybrids rice were used to identify the informative SSR marker and two hybrids (Hipa 6 and Hipa 7) used for purity assessment. Seven out of sixteen SSR markers produced polymorphic band and six markers capable to distinguish parental line of five hybrid rice. Microsatellite marker RM346 was specific used for testing genetic purity of Hipa 6 and RM206 for Hipa 7. This study showed that SSR markers were more reliable for assessing genetic purity compare to morphological characteristic.
Keyword: hybrid rice seed, SSR, genetic purity, morphological characteristic

Judul: Karakteristik Anatomi Skelet Kepala Buaya senyulong (Tomistoma schlegelii).
Abstrak: Buaya sepit atau senyulong (Tomistoma schlegelii) merupakan jenis buaya asli Indonesia yang berhabitat di sungai-sungai Sumatera, Kalimantan, dan juga pedalaman Sulawesi. Salah satu ciri khas buaya senyulong adalah bentuk moncong yang runcing dan sempit, namun hingga saat ini informasi mengenai struktur skelet kepala buaya senyulong sangat terbatas. Penelitian ini bertujuan untuk mempelajari karakteristik anatomi skelet kepala buaya senyulong yang dikatikan dengan fungsi dan perilakunya. Penelitian dilakukan secara eksploratif dengan melakukan pengamatan, pencatatan, dan pengambilan gambar dari skelet kepala buaya senyulong. Skelet kepala berukuran panjang 70 cm, lebar 29 cm, dan tingggi 17 cm dengan permukaan kasar pada os nasale, os frontale, os maxilla, os mandibula, os lacrimale, os jugale. Jumlah gigi pada buaya ini sebanyak 78 buah, terdiri dari 4 buah gigi premaxila, 16 buah gigi maxila, dan 19 buah gigi mandibula. Pada regio orbitalis ditemukan dua pasang fenestrae temporales yang berkembang baik. Fenestra supratemporale merupakan lubang oval yang membentang di sepanjang os parietale. Fenestra infratemporale berbentuk segitiga dan dibatasi oleh os squamosum, os postorbitale, os jugulare, dan os quadratum. Os mandibula hewan ini mempunyai symphysis mandibularis yang panjang yaitu garis yang melintang di corpus mandibulae. Secara fungsional ukuran symphysis mandibularis berkaitan dengan adaptasi hewan terhadap diet makan.
Keyword: kepala, moncong, Tomistoma schlegelii