New Methodology Of Aluminum Resistance Evaluation In Guinea Grass [nova Metodologia De Avaliação Da Reação De Genótipos De Capim-colonião Ao Alumínio]

A new methodology of genotype screening as to aluminum (Al3+) reaction has been proposed, based on the association of principal component and stability/adaptability analyses. Experimental trials, using nutritive solutions, have been carried out in randomized complete block designs (split-plot type), with three replications, at Genetics Department in Instituto Agronômico, Campinas, SP, Brazil, from 1995 to 1997. Root system and plant traits have been evaluated in several guinea grass (Panicum maximum Jacq.) genotypes under three Al3+ concentrations (zero, 12 and 24 mg/L), during three time periods (15, 30 and 45 days). Percentual reductions, due to the presence of Al3+, have been calculated for each character and analyses performed on them. A good precision has been achieved in genotype differentiation, strongly suggesting the use of the new methodology in plant breeding programs.351122612268Bastos, C.R., (1981) Toxicity of Aluminum in Nutrient Solution of Sorghum Seedlings, 57p. , Starkville : Mississippi State University, M.Sc. ThesisBraccini, M.C.L., Martinez, H.E.P., Pereira, P.R.G., Sampaio, N.F., Silva, E.A.M., Tolerância de genótipos de cafeeiro ao alumínio cm solução nutritiva. I. Crescimento e desenvolvimento da parte aérea e sistema radicular (1998) Revista Brasileira de Ciência Do Solo, 22 (3), pp. 435-442. , CampinasCamargo, C.E.O., Oliveira, O.F., Tolerância de cultivares de trigo a diferentes niveis de aluminio em solução nutritiva e no solo (1981) Bragantia, 40 (1), pp. 21-31. , CampinasCruz, C.D., Regazzi, A.J., (1994) Modelos Biométricos Aplicados ao Melhoramento Genético, 390p. , Viçosa : UFVEberhart, S.A., Russell, W.A., Stability parameters for comparing varieties (1966) Crop Science, 6 (1), pp. 36-40. , MadisonFoy, C.D., Physiological effects of hydrogen, aluminum and manganese toxicities in acid soil (1984) Soil Acidity and Liming, pp. 57-97. , ADAMS, F. (Ed.). Madison : American Society of AgronomyFoy, C.D., Plant adaptation to mineral stress in problem soils (1983) Iowa State Journal of Research, 57 (3), pp. 339-354. , AmesFurlani, P.R., Clark, R.B., Screening sorghum for aluminum tolerance in nutrient solution (1981) Agronomy Journal, 73 (4), pp. 587-594. , MadisonHernani, L.C., (1980) Metodologia de Seleção de Cultivares de Feijão (Phaseolus Vulgaris L.) Tolerantes ao Alumínio em Solução Nutritiva, 81p. , Piracicaba : ESALQ, Dissertação de MestradoHutton, E.M., Breeding acid-soil tolerant lines of the tropical grass Panicum maximum Jacq (1989) International Grassland Congress, 16, pp. 355-356. , Nice, 1989. Proceedings. Nice : Association Française pour la Production FourragereLafever, H.N., Genetic differences in plant responses to soil nutrient stress (1981) Journal of Plant Nutrition, 4 (1), pp. 89-109. , New YorkMcCormick, L.H., Steiner, K.C., Variation in aluminum tolerance among six genera of trees: Toxicity, surface mine revegetation (1978) Forest Science, 24 (4), pp. 565-568. , BethesdaMcLean, F.T., Gilbert, B.E., The relative aluminum tolerance of crop plants (1927) Soil Science, 24 (2), pp. 163-176. , BaltimoreModa-Cirino, V., (1984) Reação de Genótipos de Arroz (Oryza Saliva L.) de Sequeiro ao Alumínio em Solução Nutritiva, 162p. , Piracicaba : ESALQ, Dissertação de MestradoNowak, J., Friend, A.L., Aluminum sensitivity of loblolly pine and slash pine seedlings grown in solution culture (1995) Tree Physiology, 15 (9), pp. 605-609. , VictoriaPaterniani, R.S., (1996) Avaliação de Caracteres Morfológicos, de Qualidade de Sementes e Suas Correlações Em Híbridos Inéditos de Panicum Maximum Jacq., 67p. , Campinas : Unicamp, Dissertação de MestradoSiqueira, W.S., (1997) Desempenho Agronômico e Estabilidade Fenotípica de Clones de Alho (Allium Sativum L.) Derivados do Cultivo in Vitro, 135p. , Campinas : Unicamp, Tese de DoutoradoSivaguru, M., Paliwal, K., Differential aluminum tolerance in some tropical rice cultivars. I. Growth performance (1993) Journal of Plant Nutrition, 16 (9), pp. 1705-1716. , New YorkSteel, R.G.D., Torrie, J.H., (1980) Principles and Procedures of Statistics, 633p. , Tokyo : McGraw-HillThomas, D., Lapointe, S., Testing new accessions of guinea grass (Panicum maximum Jacq.) for acid-soils and resistance to spittlebug (Aeneolamia reducta) (1989) Tropical Grasslands, 23 (4), pp. 232-239. , St. LuciaVencovsky, R., Barriga, P., (1992) Genética Biométrica no Fitomelhoramento, 496p. , Ribeirão Preto : Sociedade Brasileira de Genétic