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

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

Asosiasi antara marka SSR dengan ketahanan terhadap wereng batang coklat pada varietas dan calon galur harapan padi

Development of resistant rice varieties to brown planthopper (BPH, Nilaparvata lugens Stål) must be countinuously conducted to overcome the spatial and temporal genetic change in BPH into more virulent ones which can adapt to resistance rice. The availability of linked molecular markers with BPH resistant trait can speed up selection of hybridization progenies. Close-linked markers with trait of interest can be identified using association studies between markers and phenotypic data of unrelated individuals without the need to generate hybridization progenies as an alternative method to linkage studies which use mapping population. The objective of this study was to analyze the association of rice simple sequence repeat (SSR) markers with resistance to BPH. Forty-four rice varieties and promising lines with known resistance degree to BPH biotype 3 were assessed using 30 rice microsatellite markers previously mapped in the rice chromosomal regions with effects on resistance to BPH. Association test between SSR markers and BPH resistance scores revealed eight markers (RM17, RM38, RM125, RM144, RM250, RM287, RM328, dan RM536) which were significantly associated with BPH resistance (R2=0,18 to 0,89; P<0,05). Twenty-one varieties and 11 promising lines were detected to contain SSR alleles that were associated with BPH resistance. Marker RM17 was detected in 15 varieties and 11 promising lines which were scored as resistant and moderately resistant to BPH and therefore it is potentially the most useful as early diagnostic marker to detect BPH resistance alleles. Nevertheless, to obtain SSRs that can be used as reliable selection markers for BPH resistance, marker analysis in segregating populations for the eight markers is still needed as well as associtaion test of more SSR markers widely distributed in rice chromosomes

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.Keywords: adaptation, grain quality, multilocation trial

Deskripsi varietas padi

vi, 118 hal; 25 c

TIME OF FLOODING FOR GOGO RANCAH RICE AND REPRODUCTIVE STAGE MOISTURE STRESS FOR WALIK JERAMI RICE

Abstract is available in the full text (pdf format

Deskripsi varietas padi/ Bambang Suprihatno (et al)

v, 81 hal.: tab.; 23 cm

Seminar apresiasi hasil penelitian padi menunjang P2BN (prosiding), buku 1/ Penyunt. : Bambang Suprihatno (et al)

x, 541 hal.: ill, tab.; 23 cm

Seminar apresiasi hasil penelitian padi menunjang P2BN (prosiding), buku 2/ Penyunt. : Bambang Suprihatno (et al)

vii, 543-962 hal.: ill, tab.; 23 cm