This research was aimed to describe the yield stability and growth adaptation of elite lines of aromatic rice in rice production centers of North Sumatra. The experiments were conducted at 10 sites during dry season (DS) 2001 and DS 2002. Research materials consisted of 12 elite lines introduced from IRRI with IR64 as check variety. The treatments were arranged in a randomized block design (RBD) with three replications. Stability analysis was performed using methods of Eberhart and Russell, Finlay and Wilkinson, and Francis and Kanennberg. The results showed that the interaction of genotype x environment effect was very significant, indicating the presence of specific line adaptation on a particular environment. Genotypes which had the highest average yield were not always stable genotypes, as was shown by IR71137-49-1-2 which was more suitable to the sub-optimum environment. Lines IR71143-223-3-2-2-3, IR71146-97-1-2-1-3, IR65610-24-3-6-3-2-3, IR66696-49-1-2, IR71146-407-2-1-2-1, IR71146-122-1-1-2-1 were considered as stable genotypes according to the three analysis methods and each line showed high average yield. Those genotypes are suggested to be planted in the high productivity environments in order to obtain its optimum genetic expressivity on grain yield

Green Super Rice (GSR) is rice genotype which is designed to have high yield, tolerance to biotic and abiotic stresses, as well as efficient fertilization and water. GSR is expected to have good adaptability and results under rainfed conditions. Evaluation of GSR lines under rainfed agro-ecosystem had been conducted in the District of Jakenan, Pati, Central Java Province, which is representing of rainfed lowland condition in Java, during Dry Season 2014. The experiment was conducted in a Randomized Complete Block Design (RCBD) with two replications, consisted of 30 GSR rice lines and four check varieties, i.e. Inpari 13, Inpari 10, Inpari 23, and Situ Bagendit. Twenty one days old seedlings were transplanted into a 2 m x 5 m plot size, with 1-3 seedlings per hole with planting space of 20 cm x 20 cm.The watering depended on the rainfall and pumped water from water reservoir. The results showed that for dry season in Pati, HHZ2-SKI-2-7-0Kr-JK-IND (4.09 t/ha) had higher yield compared to the best check Situ Bagendit (3.04 t/ha), and HHZ4-SKI-5-4-0Kr-JK-IND (3.91 t/ha) along with Zhonghua1-SKI-1-IND (3.85 t/ha) had higher yield than second best check, i.e. Inpari 13 (2.88 t/ha). Those lines are prospective for further testing since it has high yield and acceptable agronomic performance for Indonesian farmers. Superiority of the lines might be due to number of filled grain/panicle, tiller number, and early maturing characteristics. There was high similarity (50%) among the tested genotypes.Keywords: GSR, rainfed lowland, Pati. ABSTRAKGreen Super Rice (GSR) adalah tanaman padi yang dirancang untuk memiliki daya hasil tinggi, toleran terhadap cekaman biotik dan abiotik, serta efisien pemupukan dan air. GSR diharapkan memiliki daya adaptasi dan hasil yang baik pada kondisi sawah tadah hujan. Evaluasi galur-galur padi GSR pada lahan tadah hujan telah dilakukan di Kecamatan Jakenan, Kabupaten Pati, Provinsi Jawa Tengah pada MK 2014. Penelitian menggunakan Rancangan Acak Kelompok 2 ulangan dengan perlakuan 30 galur padi GSR dan empat varietas pembanding. Galur-galur GSR yang dievaluasi merupakan galur hasil seleksi di Indramayu pada musim sebelumnya. Varietas pembanding yang digunakan adalah Inpari 13, Inpari 10, Inpari 23, dan Situ Bagendit. Bibit umur 21 hari setelah sebar dari setiap galur dan varietas pembanding ditanam 1-3 bibit per lubang pada plot berukuran 2 m x 5 m dengan jarak tanam 20 cm x 20 cm. Pengairan bergantung pada turunnya hujan dan pompa air dari embung penampung air hujan. Hasil penelitian menunjukkan bahwa galur yang diuji memiliki perbedaan nyata dan sangat berbeda nyata pada karakter agronomi yang diamati. Galur GSR yang beradaptasi relatif baik di sawah tadah hujan Kabupaten Pati pada musim kemarau adalah HHZ2-SKI-2-7-0Kr-JK-IND (4,09 t/ha) yang memiliki hasil nyata lebih tinggi daripada cek terbaik Situ Bagendit (3,04 t/ha), dan HHZ4-SKI-5-4-0Kr-JK-IND (3,91 t/ha) serta Zhonghua1-SKI-1-IND (3,85 t/ha) yang memiliki hasil nyata lebih tinggi daripada cek terbaik kedua, yaitu Inpari 13 (2,...

Evaluation some mutant rice lines on rainfed area. Some mutant rice lines are expected to have good adaptability in the rainfed areas. Evaluation of drought tolerant rice lines in the rainfed land has been conducted in District Jakenan, Pati, Central Java in DS 2014. The Study used a randomized experimental design with 2 replications treatment 38 drought tolerant mutant rice lines and four varieties for the check. Mutant lines were evaluated coming from Co60 gamma-rays against Inpari 13. Varieties for check used is Inpari 13, Inpari 10, Inpari 23, and Situ Bagendit. Seedling age 20 days after sowing of each line and varieties grown as much as 1-3 seeds per hole on a plot measuring 2 m x 5 m with a spacing of 20 cm x 20 cm. Watering depends on rain and pump water from rainwater reservoir. The results showed that the lines tested had noticeable difference to the five agronomic characters were observed, but no real character number of productive tillers. A total of 13 genotypes showed higher yields than all varieties. Two genotypes showed a different result was significantly higher than Inpari 13 are BP17280M-26D-1-SKI-1-IND-1 (3.89 t / ha) and BP17280M-24C-2-1-SKI-1-IND- 1 (3.54 t / ha). While the best varieties Inpari 13 and Situ Bagendit achieve respectively 2.88 t / ha and 3.04 t / ha. The average best genotypes age at 50% flowering is 68-70 DAS and harvest age is HSS 98-104. With this result is expected to give a great chance on the tests subsequent to the development of new varieties of rainfed rice.

Increasing of significant population also resulted in increased national food needs. Conversion of arable land into non-agricultural land make suboptimal lands became the target of planting areas to fulfill food security. Swamp land is one of suboptimal land which potential to be developed. Swamp land in Indonesia (33.40 to 39.40 million ha) has a huge potential to support the stability of the national rice production. In addition to abiotic stresses, biotic stresses also often occurs in swamp lands. This study aims to select the lines which have high yield and resistant to bacterial leaf blight (BLB). This experiment was conducted at Muara, Bogor in April-September 2014. The materials are 318 lines with five check varieties namely Inpara 2, Inpara 3, Inpara 6, Inpara 7, and IR42. The experiment was arranged in a augmented design. Observation were made on plant height, tiller number, age of flowering, age of maturity, yield, scores of bacterial leaf blight (BLB), and a score of phenotypic acceptability (PACP). Data were analyzed using SAS version 9 for analysis of variance and continue with path analysis and weighted standardized selection index. The results showed that there were sixty lines selected based on weighted standardized selection index. The lines have a yield between 4.48 to 7.48 t / ha and promissing to the next test. Three lines have yield which significantly higher than Inpara 2 namely B13100-2-MR-2-KA-3-2 (7.48 t / ha), TDK-Sub 1 1- MR-1 (7.04 t / ha), and B13991E-KA-25 (6.98 t / ha). TDK-Sub 1 1- MR-1 and B13991E-KA-25 also have resistance to bacterial leaf blight.

Salah satu upaya peningkatan produktivitas padi sawah irigasi adalah dengan merakit Varietas Unggul Baru (VUB) yang memiliki daya hasil tinggi serta sesuai dengan kondisi agroekosistem, sehingga perlu adanya peningkatan stabilitas suatu galur agar tetap berproduksi tinggi. Tujuan penelitian ini untuk mengevaluasi keragaan agronomi hasil 31 galur padi (Oryza sativa L.) inbrida sawah irigasi dengan potensi hasil tinggi pada dataran rendah Sukamandi. Penelitian dilaksanakan pada bulan September 2021 – Januari 2022 (Musim Tanam (MT) 2-2021) di Kebun Percobaan Balai Besar Penelitian Tanaman Padi Sukamandi. Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) dengan 39 perlakuan yang terdiri dari 31 galur dan 8 varietas pembanding yaitu Inpari 30, Inpari 32, Inpari 42, Cakrabuana, Inpari Digdaya, Inpari Gemah, Inpari 47, dan Inpari 48 yang diulang sebanyak 3 kali. Hasil penelitian menunjukkan bahwa terdapat galur-galur yang diuji memiliki perbedaan yang nyata pada seluruh karakter keragaan agronomi. Sebanyak delapan galur harapan nyata mempunyai hasil panen mendekati varietas pambanding terbaik Inpari 42 (5,5 t/ha) dengan kisaran 4,25-5,34 t/ha. Galur-galur tersebut yaitu BP 4126f-Kn-1-WBC-2-3-4, BP 30546D-SKI-19-3-2, B14667E-MR-18-5-Kn-1, B14928D-MR-27-2-5-3-PN-2, IR 102860-8:42-B-B, B1398E-KA-6-3, PR40786-16-2-0-SBY-0-CRB-0, dan BP18322-3-2-JK-0-IDN-2-SKI-6-PWK-2.