BRS Bonanca is an upland rice cultivar developed by Embrapa Rice and Beans and recommended for sowing in the states of Goias, Maranha, Mato Grosso, and Piaui. BRS Bonanca average grain yields were higher than the checks: flowered 80 days after germination; presented good cooking quality and resistance to the main rice diseases

BRESEGHELLO, F.

CASTRO, E. da M. de

GUIMARÃES, E. P.

MORAIS, O. P. de

MOURA NETO, F. P.

PEREIRA, J. de A.

SANT'ANA, E. P.

SOUZA, N. R. G. de

WANDERLEY, J. C.

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4392001, Sociedade Brasileira de Melhoramento de PlantasINTRODUCTIONBRS Bonança is an upland rice cultivar developedfrom an inbred line introduced from theInternational Center for Tropical Agriculture(CIAT), registered and protected by theEmbrapa Rice and Beans, a research center ofthe Brazilian Corporation for AgriculturalResearch. It was recommended for sowing inthe states of Goiás, Maranhão, Mato Grosso,and Piauí, contributing to around 55% of the 2.5million hectares of upland rice grown in Brazil,yearly. The inbred line which originated BRSBonança was known as CNA 8172 in the yieldtrials were carried out from 1994/95 to 1997/98 cropping seasons.PEDIGREE AND BREEDING METHODBRS Bonança (Figure 1) originated from theCT11614 (CT7244-9-2-1-52-1/CT7232-5-3-7-2-1P//CT6196-33-11-1-3-AP) cross madeat CIAT, in Cali, Colombia. The inbred line wasdeveloped using the pedigree method with singleplant selection from F1 through F5. In 1992,Brazilian scientists went to Colombia and selected89 F5 inbred lines, including the CT11614-1-4-1-M. These lines were introduced in Brazil, in1993 following the Embrapa Genetic Resourcesand Biotechnology Center quarantinerequirements. Observation trials were conductedBRS Bonança: Upland rice cultivarEvaldo Pacheco Sant’Ana1; Orlando Peixoto de Morais1; Emílio da Maia de Castro1; Elcio PerpétuoGuimarães*1; Francisco Pereira de Moura Neto1; Flávio Breseghello1; José de Almeida Pereira2;Job Carneiro Wanderley3 and Nara Regina Gervine de Souza41Brazilian Corporation for Agricultural Research, National Rice and Beans Research Center - EmbrapaRice & Beans, P.O. Box 179, CEP 75375-000 Santo Antonio de Goiás, GO, Brazil; 2Embrapa Mid-North;3Rural Agency for the State of Goiás; 4State Enterprise for Research and Extension for the State of MatoGrosso (*Corresponding Author. E-mail: eguimara@cnpaf.embrapa.br)ABSTRACTBRS Bonança is an upland rice cultivar developed by Embrapa Rice and Beans and recommendedfor sowing in the states of Goiás, Maranhão, Mato Grosso, and Piauí. BRS Bonança average grain yieldswere higher than the checks; flowered 80 days after germination; presented good cooking quality andresistance to the main rice diseases.KEY WORDS: Oryza sativa, cultiivar characteristics, seed production.in 1993/94, using the Federer Augmented Design(Zimmermann, 1997). In 1994/95, the inbredline CT11614-1-4-1-M was subjected toevaluation in the Preliminary Yield Trials. From1995/96 to 1997/98 it was further evaluated in123 Advanced Yield Trials in several locationsall over the country.PERFORMANCEBRS Bonança, in average, flowered 80 days aftergermination and yielded 4001, 2716, 3501 and4172 kg.ha-1, in Goiás, Maranhão, Mato Gros-so and Piauí; representing 104.2, 97.4, 114.5and 110.5% of the most productive checkcultivars, respectively (Table 1). Its superiorbehavior was best expressed in the state of MatoGrosso, the most important upland rice-producing state in the country.OTHER CHARACTERISTICSBRS Bonança has long and translucent grains withhigh and stable milling quality. It cooks dry andfluffy due to its amilose content and intermediategelatinization temperature. Its white belly is low(Table 2). All these characteristics meetconsumers’ requirements and other importantagronomic traits such as resistance to lodging andtolerance to the most important rice diseases, likeblast, grain discoloration and brown spot.Crop Breeding and Applied Biotechnology, v. 1, n. 4, p. 439-441, 20014402001, Sociedade Brasileira de Melhoramento de PlantasPEDIGREE SEED MAINTENANCE ANDDISTRIBUTION BRS Bonança breeder seeds are maintained byEmbrapa Rice and Beans in Goiania, Goias,Table 1 - Performance (kg.ha-1) of BRS Bonança, Primavera and Caiapó, upland rice cultivars, in thestates of Goiás, Maranhão, Mato Grosso and Piauí, in 1997/98 and 1998/99.1/Average of 6 locations;2/Average of 9 locations.Table 2 - Chemical and physical grain characteristics of the rice cultivar BRS Bonança compared toPrimavera and Caiapó.1/Total = Percentage of total grain milled; whole = Percentage of whole grain; AC = Percentage of Amilose Content; GT= Index for gelatinization temperature; L = Length (mm); W = Width (mm); WB = White Belly.Brazil. This is the first rice cultivar licensed to agroup of Brazilian seed producers responsiblefor producing, marketing and selling certifiedseeds to rice farmers.Crop Breeding and Applied Biotechnology, v. 1, n. 4, p. 439-441, 2001Cultivars Goiás1 Maranhão1 Mato Grosso2 Piauí2 BRS Bonança 4001 2716 3501 4172 Primavera 3442 2787 2993 3361 Caiapó 3835 1996 2626 3735 Characteristics1 Cultivars Total Whole AC GT L W WB BRS Bonança 65.8 566 27.3 3.4 7.0  2.7 2,7 Primavera 66.2 46.8 26.3 4.9 3.0  1.7 2,3 Caiapó 68.0 60.0 26.2 3.9 5.3  4.0 2,6  4412001, Sociedade Brasileira de Melhoramento de PlantasReceived: July 24, 2001;Accepted: September 05, 2001.REFERENCEZimmermann, F.J.P. 1997. Estadística aplicadaa la selección recurrente. p.67-75. In: Guimarães,E.P. Selección recurrente en arroz. CentroInternacional de Agricultura Tropical, Cali,Colombia.                    TOx 1780                  CT6491                        Col 1 x M312A               CT7244                           IAC 1246                  IAC 47                        IAC 1391                                           TOx 1010                  CT5633                        Col 1 x M312A               CT7232                           IRAT 122          BRS Bonaça       CT5664                        IAC 47                                           Col 1 x M312A                  P 5607                        IRAT 124               CT6196                           Bl 545                  RHS 107                        P 2272 Figure 1 – Parents involved in the cross which originated the cultivar BRS Bonança.Crop Breeding and Applied Biotechnology, v. 1, n. 4, p. 439-441, 2001S Bonança

BRS Bonança: upland rice cultivar.

SOUZA, N. R. G. de.

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BRS Bonança: upland rice cultivar.

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