Potensi Hasil Galur Harapan Padi Sawah Ultra Genjah Dan Sangat Genjah

Breeding for high yielding rice varieties with VVEM (<90 days after sowing/ das) is considered important to increase cropping indexes in the fully irrigated farm lands. This research was aimed to evaluate the yield potential of 200 promising VVE and VE maturing rice lines. A total of 200 VVE and VE maturing rice lines and five check varieties (Ciherang, Dodokan, Inpari 1, Inpari 13, Silugonggo) were evaluated in Preliminary Yield Trial (PYT) at Sukamandi Experimental Farm using augmented design, during the dry season of 2012. The 17 lines selected from PYT along with three check varieties (Silugonggo, Inpari 13, Ciherang) were further evaluated in Advanced Yield Trial (AYT) using randomized complete block design at Sukamandi, Kuningan, Magelang and Klaten, during wet season of 2012. Of the 200 lines tested in PYT, three lines yielded significantly higher than the best check variety (Inpari 1) and 2 lines did equal to Inpari 1. A total of 155 lines were VVE (<90 das), and 45 lines were VE maturing (91-104 das). Based on yield per day, 17 lines were selected to be evaluated in AYT in WS 2012. Based on combined analyses from four locations of AYT, seven lines produced grain yield/ha and grain yield/day higher than did the best check Silugonggo (5.51 t/ha and 51.7 kg/day); there were14 lines did better than Ciherang (5.07 t/ha; 41.9 kg/day), and 13 lines yielded better than did Inpari 13 (5.27 t/ha; 46.7 kg/day). The best seven lines and lines with higher productivity per day than that of the best check, with an average yield of 5.62 t/ha up to 6.12 t/ha, with days to maturity from 87 up to 94 das, were ready to be evaluated in Multi Locational Yield Trial to meet the requirement for the release of new variety

Potensi Hasil dan Mutu Beras Sepuluh Galur Harapan Padi untuk Lahan Rawa Pasang Surut

Breeding programs to improve rice varieties for tidal swamp areas have successfully developed a number of promisingbreeding lines. The objectives of this study were to evaluate the performance of ten advance breeding lines in multilocationyield trials and to analyze grain quality of the lines. The lines and two check rice varieties, IR42 and Batanghari, wereevaluated in replicated yield trials in six different tidal swamp environments. Grain quality of these lines were analyzed todetermine physical and chemical properties of the milled and cooked rice. Result from multilocation yield trials showedthat the breeding lines had higher yield potential compared to popular variety IR42 and their yields were comparable tothe control variety Batanghari. The lines showed different adaptability against different environments; some of the linesdemonstrated wide adaptability while the others showed specific adaptation ability. All of the lines had good grain qualitywhile they had different shape and texture which made them potential to be accepted in different regions. The result fromthis study indicated that all of the lines have potential to be commercially cultivated in tidal swamp areas. In addition, dataobtained from this study have been used in the registration of three lines as new varieties for swampy area namely IPB 1RDadahup, IPB 2R Bakumpai and Inpara 6

Interaksi Genotipe X Lingkungan Untuk Hasil Gabah Padi Sawah

Grain yield of rice is determined by genotype (G), environment (E), and interaction between genotype x environment (G x E). Variety can achieve its maximum yield potential if it is grown in suitable environments. This study was aimed to determine the adaptability and the yield stability of rice genotypes grown in different environments. Sixteen rice genotypes were tested using RBD in 16 sites during the wet season of 2010/2011, and dry season of 2011. The tested rice lines were developed for resistance to pest and diseases. The experiment unit was 4 m x 5 m of plot, plants were fertilized with urea, SP36, and KCl at rates of 250 kg/ha, 100 kg/ha, and 100 kg/ha, respectively. Variable observed was grain yield per plot. Combined analyses of variance showed that there was no lines yielded higher than did check variety Conde. The AMMI analysis showed that the largest variation was contributed by the environment factors (76.49%), genotype x environment interactions (17.55%), and the smallest was contributed by the genotypes (5.97%). Data exploration using boxplot method indicated that the low contribution of the genotype x environment interaction variance in this study was due to the high degree of similarity of yield potentials among the genotypes, and due to high similarity of environmental conditions of the sites.Based on the analysis of AMMI 2, lines B12743 - MR-18-2-3-8, IPB107-F-82-2-1, and Conde was each classified as widely adapted genotypes, while G8, IPB107-F-27-6-1, and BIO111-2-BC-PIR-3714, each was considered as genotype having a specific adaptation

Pembentukan Genotipe Padi Berumur Sangat Genjah Melalui Kultur Antera

Development of Very Early Maturing Rice Genotypes through Anther Culture. Iswari S. Dewi, A. Dinar Ambarwati, Aniversari Apriana, Atmitri Sisharmini, Ida H. Somantri, Bambang Suprihatno, and Iman Ridwan. Rice is the most important food crop in Indonesia. Increase in production is needed due to population increase. Rice production in rainfed area is contributed the second after irrigated area. Rainfed condition requiring very early maturity (90-104 days) varieties. Rice anther culture can be applied to accelerate obtainment of doubled haploids (DHs) or pure lines needed in rice breeding. The experiment was aimed to obtain pure lines for developing very early maturing and high yielding rice varieties. Materials used for anther culture were F1s of Fatmawati/Kinamase, Inpari 1/Kinamase, Fatmawati/ Waseaikoku, Inpari 1/Waseaikoku, Fatmawati/IR71146, Inpari 1/IR71146, OM4495/Silugonggo, IR7146/Dodokan, and IR71730/OM1490. Anther culture media were N6 + NAA 2,0 mg/l + kinetin 0,5 mg/l for callus induction, MS+ NAA 0,5 mg/l + kinetin 2,0 mg/l for plantlet regeneration, and MS + 0,5 mg/l IBA for rooting. Putrescine 10-3 M was added to callus induction and regeneration media. The results shown that calli forming green plantlet (CFGP) were ranged from 0.25 to 83.33%. Fatmawati/Kinamase gave the highest CFGP (245 calli), followed by Inpari 1/Kinamase (78 calli) and Fatmawati/ Waseaikoku (68 calli). Total green plantlets obtained were 2.038 plantlets. After plantlet acclimatization and greenhouse grow-out, we obtained 507 DHs. The evaluation of 100 DHs at farmer field (Ciranjang District in Cianjur), based on their 50% heading date of 65 days, resulted in 33 lines cathegorized as very early maturing lines (+100 days). They were 18 lines from Fatmawati/Kinamase, 5 lines from Inpari 1/Kinamase, 8 lines from Fatmawati/Waseaikoku, and 2 lines from Inpari 1/ Waseaikoku

Deskripsi varietas unggul baru padi

v, 74 hlm.; ill.: 24 cm

Interaksi Genotipe x Lingkungan untuk Hasil Gabah Padi Sawah

Grain yield of rice is determined by genotype (G), environment (E), and interaction between genotype x environment (G x E). Variety can achieve its maximum yield potential if it is grown in suitable environments. This study was aimed to determine the adaptability and the yield stability of rice genotypes grown in different environments. Sixteen rice genotypes were tested using RBD in 16 sites during the wet season of 2010/2011, and dry season of 2011. The tested rice lines were developed for resistance to pest and diseases. The experiment unit was 4 m x 5 m of plot, plants were fertilized with urea, SP36, and KCl at rates of 250 kg/ha, 100 kg/ha, and 100 kg/ha, respectively. Variable observed was grain yield per plot. Combined analyses of variance showed that there was no lines yielded higher than did check variety Conde. The AMMI analysis showed that the largest variation was contributed by the environment factors (76.49%), genotype x environment interactions (17.55%), and the smallest was contributed by the genotypes (5.97%). Data exploration using boxplot method indicated that the low contribution of the genotype x environment interaction variance in this study was due to the high degree of similarity of yield potentials among the genotypes, and due to high similarity of environmental conditions of the sites.Based on the analysis of AMMI 2, lines B12743 - MR-18-2-3-8, IPB107-F-82-2-1, and Conde was each classified as widely adapted genotypes, while G8, IPB107-F-27-6-1, and BIO111-2-BC-PIR-3714, each was considered as genotype having a specific adaptation.</jats:p