TY - JOUR AU - López, Ernesto AU - Tosquy-Valle, Oscar Hugo AU - Villar, Bernardo AU - Becerra, Enrique Noé AU - Ugalde, Francisco Javier PY - 2003/09/19 Y2 - 2024/03/28 TI - Adaptation, multiple disease resistance and acid soils tolerance of bean genotypes. JF - Agronomía Mesoamericana JA - Agron. Mesoam. VL - 14 IS - 2 SE - Articles DO - 10.15517/am.v14i2.11943 UR - https://revistas.ucr.ac.cr/index.php/agromeso/article/view/11943 SP - 151-155 AB - <p>The objective of this</p><p>experiment was to select bean genotypes with high yield</p><p>potential, wide adaptation, multiple disease resistance and</p><p>tolerance to acid soils. For that reason, during the Fall-Winter</p><p>1999-2000 cycle, a uniform yield trial was conducted in four</p><p>environments in Veracruz and Chiapas, Mexico. Sixteen</p><p>genotypes were evaluated, including the varieties Negro</p><p>Jamapa as a regional control. A randomized Complete Block</p><p>design with three replications was used. Grain yield was</p><p>evaluated by means of individual and combined analysis of</p><p>variance and stability parameters. Reaction to diseases was</p><p>graded according to a 1-9 scale; the Efficiency Index (IE) was</p><p>used to evaluate the tolerance to acid soils. There were</p><p>significant differences in grain yield and tolerance to diseases</p><p>for localities, genotypes and the locality .genotype</p><p>interaction; whereas for the tolerance to acid soils there was</p><p>no significant differences between localities and the</p><p>interaction. The best genotypes with regard to yield,</p><p>adaptation and tolerance to acid soils were Negro 8025,</p><p>DOR-454, Icta Ju 95-112, Icta Ju 93-15 and DOR-448; the</p><p>first and the last varieties had multiple resistance to diseases.</p><p>The lines UCR-55, TLP-22 and DOR-500 also showed high</p><p>yields and multiple disease resistance.</p> ER -