80 documents found, page 1 of 8
Natural selection and family x location interaction in the common (dry) bean pl...
PIROLA, L. H.; RAMALHO, M. A. P.; CARNEIRO, J. E. S.; ABREU, A. de F. B.Natural selection takes place while advancing generations of segregant populations of self pollinating species by the population (bulk) method. There is evidence that it maintains the individuals with greater grain yield. The question arises whether natural selection preserves the individuals which are more adapted only to the environment where the generation advance occurred, that is, if it contributes to incr...
Prediction of seed-yield potential of common bean populations.
ABREU, A. de F. B.; RAMALHO, M. A. P.; SANTOS, J. B. dosEarliest possible prediction of seed-yield potential of autogamous crop populations increases breeding program efficiency by saving time and resources. Alternatives for obtaining seed-yield predictions were compared by evaluating four common-bean populations in F1 and F2 generations together with the parents. Mean components (m + a' and d) and variances were estimated. The potential of each population was predi...
Response of common bean progenies for water use efficiency.
LIMA, D. C.; ABREU, A. de F. B.; RAMALHO, M. A. P.Our aim in this study was to evaluate common bean progenies for water use efficiency (WUE) and verify if selection carried out under conditions without water limitation reflects the selection carried out under stress conditions. Eighty progenies from the BRSMG Talismã x G4280 cross and 80 from the BRSMG Talismã x G6492 cross were evaluated with high water availability (HWA) and low water availability (LWA) in t...
Dry matter accumulation in genotypes of bean submitted to different levels of n...
ARAÚJO, J. R.; RAMALHO, M. A. P.; BRUZI, A. T.; ABREU, A. de F. B.Neste trabalho, objetivou-se verificar como ocorre o acúmulo de massa seca em linhagens de feijoeiro (Phaseolus vulgaris L.) diferindo na resposta ao fertilizante nitrogenado. Para isso, seis genótipos ('BRSMG Majestoso', 'Pérola', MA-I-18.13, 'Ouro Negro', 'BRSMG Talismã', MA-I-2.5) foram avaliados em Lavras, na presença de três níveis de N (0, 60 e 120 kg/ha), tendo como fonte de N o Sulfato de Amônio. O deli...
Inheritance of resistance to Fusarium oxysporum f. sp. phaseoli Brazilian race ...
PEREIRA, M. J. Z.; RAMALHO, M. A. P.; ABREU, Â. de F. B.Com o objetivo de obter informações a respeito do controle genético da resistência do feijoeiro (Phaseolus vulgaris L.) ao fungo Fusarium oxysporum f. sp. phaseoli, foram realizados seis cruzamentos envolvendo três linhagens resistentes (Carioca MG, ESAL 583 e ESAL 566) e quatro suscetíveis ao fungo (Carioca, CNFC 10443, Uirapuru e ESAL 522). As plantas dos genitores, das testemunhas (Carioca MG e Carioca) e da...
New strategy for evaluating grain cooking quality of progenies in dry bean bree...
CARVALHO, B. L.; RAMALHO, M. A. P.; VIEIRA JÚNIOR, I. C.; ABREU, A. de F. B.The methodology available for evaluating the cooking quality of dry beans is impractical for assessing a large number of progenies. The aims of this study were to propose a new strategy for evaluating cooking quality of grains and to estimate genetic and phenotypic parameters using a selection index. A total of 256 progenies of the 13thcycle of a recurrent selection program were evaluated at three locations for...
Procedures for identification of superior progenies in successive generations o...
LEMOS, R. do C.; ABREU, A. de F. B.; RAMALHO, M. A. P.When breeding the common bean in Brazil, the best progenies are chosen, normally, from solely the generation under analysis at the conclusion of the evaluation, without considering what occurred in the past. However, a number of recently published studies show that if an evaluation were to consider all relevant generations, the gain from selection could be higher, especially when an index that involves informat...
Genetic control of viviparity in common bean.
PEREIRA, L. A.; RAMALHO, M. A. P.; ABREU, A. de F. B.; GUILHERME, S. R.In common bean (Phaseolus vulgaris) harvesting is carried out in the field. It is therefore necessary that cultivars be tolerant to viviparity, i.e., germination of grains still in the pods. Study of the percentage of germination of beans in the pods under laboratory conditions, where humidity content is high, has been proposed. Furthermore, under question is whether the thickness of the pod wall affects water ...
Recurrent mass selection for upright plant architecture in common bean.
PIRES, L. P. M.; RAMALHO, M. A. P.; ABREU, A. de F. B.; FERREIRA, M. C.Plant with a more upright architecture offers many advantages to farmers. Recurrent mass selection (RS) programs for carioca type common bean have been implemented for the purpose of obtaining new lines that will generate the high yields that are associated with upright plant archi tecture. This study aimed to assess the efficiency of recurrent mass selection (RS) for upright plant architecture in common bean (...
Genetic control of plant architecture in the common bean (Phaseolus vulgaris L.).
TEIXEIRA, F. F.; RAMALHO, M. A. P.; ABREU, A. de F. B.More erect plant architecture has been a goal in the development of bean cultivars. Aiming to obtain more information about genetic control of traits related to plant architecture, this work was carried out between August 1995 and July 1997 in the southern and Alto São Francisco regions, in the State of Minas Gerais, Brazil. Initially, analyses were performed with individual plants of parents and different segr...