The prevalence of Iron (Fe) defficiency in Indonesia is around 31 -63.5 %. High Fe content rice lines had been developed to overcome the problem. This study was aimed to explore the effect of genotype (G) and genotype × environment inter-action (GEI) on yield of 21 high Fe content rice genotypes under 5 irrigated field environments. The research was conducted at DS 2011 in 2 locations and DS 2012 in 3 locations following randomized complete block design with three replications in each location. Combined analysis of variance showed genotype x environment inter-action at 1% probability level, where G and GEI captured totally 88.8% of total variability. There were two Mega-environments constructed, i.e. Mega-E 1 that contained environments of trials in dry season 2011 (E4 and E5) with the winner of G12 (BP9474C-1-1-B) and Mega-E 2 that contained environments of trials in dry season 2012 (E1, E2, and E3) with the winner of G3 (A69-1). E1 (Subang, DS 2012), E2 (Karawang, DS 2012, and E3 (Indramaru, DS 2012) had good discriminativeness and representasiveness for yield trait of high Fe content rice lines. Mean performance and stability of genotypes indicated that G3 (A69-1; average 6.72 t ha -1 ) was highly stable with high yield.
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<p>More than 80 high yielding varieties of rice have been released nationally by IAARD to support acceleration of national rice production. Inpari 13 was the one of some new variety that has been released at 2011 and have superior trait i.e early maturity and high yielding. Inpari 13 and some another new variety would disseminated at ICM program at this year. That variety needed to evaluated on Display Area and cultivated by using ICM technology and its compared with old variety as well as Ciherang. This study was to evaluate performance and yield of some new varieties compared old varieties specifically in Dem area. The experiment was conducted in West Java AIAT Dem Area, District Jayakerta, Karawang. The study was done on DS 2011 (Mei 2011-Januari 2012) by using randomized block design with 3 replications. Six varieties were tested i.e Ciherang, St. Bagendit, Inpari Inpari-7, Inpari-10, Silugunggo and Inpari-13. Integrated Crop Manajemen system i.e legowo 2:1, optimal fertilization, and IPM were used at this research. The results showed that there were signifant differences between varieties in all characters except leaf color index. Ciherang has the highest plant height (97,59 cm). Inpari-7 has the highest number of productive tillers and 100 grains weight (25 tillers/clump and 2,8 grams) and the least number of empty grains (7 grains/ panicle). St. Bagendit has the highest number of pithy grain (183 grains/panicle). Silugonggo was the early maturity but it’s resistant to stems brown planthopper (almost had a crop failure). The highest dry grain harvest was owned by Situ Bagendit (8,10 t.ha 1) followed Ciherang (8,08 t.ha-1), Inpari-13 (8,07 t.ha-1), Inpari-7 (7,52 t.ha-1), Inpari-10 (6,71 t.ha-1), and Silugonggo (2,05 t.ha-1).</p>
Hawar daun bakteri (HDB) adalah salah satu penyakit utama dan penting pada tanaman padi yang disebabkan oleh bakteri patogen Xanthomonas oryzae pv. oryzae (Xoo), terutama padi sawah irigasi. Morfologi daun menjadi karakter yang menarik untuk diinvestigasi hubungannya dengan intensitas penyakit HDB karena daun merupakan bagian tanaman yang diserang oleh penyakit HDB. Tujuan penelitian ini adalah untuk memperoleh informasi keragaman morfologi daun dan korelasinya dengan penyakit HDB untuk mendukung program perakitan varietas unggul tahan HDB. Sebanyak 25 aksesi padi lokal dikarakterisasi secara fenotipik. Pengujian karakter morfologi dilakukan tanpa menggunakan ulangan, sedangkan uji ketahanan terhadap Xoo (patotipe IV) dilakukan dengan menggunakan rancangan percobaan acak kelompok (tiga ulangan). Hasil uji morfologi daun menunjukkan semua aksesi padi lokal memiliki leher berwarna hijau, warna telinga transparan, warna lidah putih, dan bentuk lidah 2-cleft. Pada 4 minggu setelah inokulasi (MSI) terdapat empat aksesi (Ketan Lomah Hitam, Bumbuy Inih, Gonggoi, dan Waren) yang menunjukkan persentase keparahan terhadap penyakit HDB antara 1316%, dan nilai ini mengindikasikan tingkat ketahanan yang agak rentan terhadap penyakit HDB dan lebih baik dari aksesi lainnya. Morfologi permukaan daun berkorelasi positif dengan ketahanan terhadap HDB, dan keempat aksesi tersebut memiliki permukaan daun berbulu atau sedikit berbulu dan daun berukuran pendek. Hasil penelitian ini dapat dijadikan sebagai referensi dalam proses seleksi pada program perakitan varietas unggul baru yang tahan penyakit HDB.
ABSTRAKKondisi sawah tanpa ada pengairan merupakan salah satu masalah di lahan tadah hujan. Lahan sawah seperti ini hanya mengandalkan keberadaan air dari air hujan. Hal tersebut membuat keberadaan air menjadi faktor pembatas pertumbuhan. Penelitian ini bertujuan untuk mengetahui penampilan galur-galur generasi lanjut, mengetahui nilai duga parameter genetik serta memperoleh galur terbaik pada kondisi kekeringan. Sebanyak 100 galur untuk toleransi kekeringan generasi lanjut (>F8) diujicobakan dengan menggunakan rancangan Augmanted design dengan lima blok. Sebanyak enam varietas pembanding diikutsertakan pada percobaan. Penelitian dilakukan pada MK 2015 di Kebun Percobaan BB Padi-Sukamandi. Hasil penelitian menunjukkan bahwa pada kondisi kekeringan menghasilkan keragaan nilai rata-rata galur untuk karakter tinggi tanaman 103,44 cm, jumlah anakan produktif 12 anakan, persentase pengisian bulir bernas hanya mencapai 60,46%, indeks warna daun 39,37, bobot 1.000 butir rata-rata sekitar 26,34 g dengan bobot hasil gabah per 5 rumpun 166,34 g. Karakter hasil pada kondisi kekeringan apabila dikonversikan ke hektar adalah sebesar 3,77 t ha -1 . Hampir semua karakter memiliki variabilitas yang luas, nilai heritabilitas tinggi dan % KGH yang tinggi kecuali jumlah bulir bernas per malai. Galur BP17572c-SBY-1-CRB-2-SKI-1-3-PWK-2, ZX115-SKI-0-IND-2-SKI-1-PWK-2, BP30104e, BP17572c-SBY-1-CRB-2-SKI-1-4-PWK-2, dan BP17554-1c-SBY-1-CRB-8-SKI-1-6-PWK-2 memberikan keragaan terbaik dengan potensi hasil lebih tinggi daripada pembanding terbaik yaitu Inpari 13. Terdapat sepuluh galur harapan untuk dilanjutkan pada uji daya hasil pendahuluan untuk perakitan varietas padi tadah hujan.Kata kunci: galur generasi lanjut, kekeringan, keragaan, padi, parameter genetik ABSTRACTThe condition of rice field without any irrigation is one of the problems in the rainfed land. This rice field only relies on the existence of water during the rainy day. This causes the limitation of water availability which affect plant growth. This study aimed to know the performance of the rice advance lines, estimated the value of genetic parameters and obtains the best line on drought condition. As many as 100 advance lines (> F8) for drought tolerant were tested using Augmented Design in five blocks. A total of six-check varieties were included in the experiment. The research was conducted at Dry Season of 2015 in ICRR-Sukamandi
Morpho-agronomic characters consist of two types of qualitative and quantitative characters. Qualitative characters were discontinuous and score data form, while the quantitative are continuous and measurable. Kinship analysis is important for breeders to know the genetic distance between genotypes. Allegedly there are differences in the genetic kinship analysis between based on data from qualitative to quantitative character. The aim of this study was to compare the results of the analysis of kinship based on quantitative and qualitative data on phenotypic characterization of local rice. A total of 43 local rice from West Java was used on phenotypic characterization activities. The research was done at Sukamandi experiment station of ICRR (Indonesian Rice Research Institute) on 2014. Qualitative characters were observed as many as 24 characters, and quantitative as many as 23 characters. Analysis of data was by using Minitab version 14. The results indicate that kinship analysis results using data from qualitative, quantitative or a combination of both was not significantly different at the component level analysis of the number of clusters and similarity but there were real differences in the level of genetic distance. Dendogram based on qualitative characters was different than based on quantitative character. Analysis of kinship between genotype recommended using a data combination of qualitative and quantitative character that the genetic distance between genotype information more accurately
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