Resposta de Cultivares de trigo com distintas capacidades de perfilhamento sob diferentes densidades de semeadura

Abstract

Knowledge of the interaction between wheat genotypes (Triticum aestivum L.) and seeding rates is essential to refine cultivar recommendations, especially in Central Brazil. Among the quantitative traits that may influence this interaction, tillering capacity is noteworthy. This study aimed to evaluate the agronomic response of wheat cultivars with distinct tillering capacities under varying seeding rates in a rainfed cropping system in southern Minas Gerais. The experiment was conducted in Lavras, MG, at the Center for Scientific and Technological Development in Agriculture (Muquém Farm) of the Federal University of Lavras (UFLA). Twelve wheat cultivars (BRS 404, BRS 264, BR 18-Terena, MGS 3 Brilhante, ORS Absoluto, ORS Soberano, ORS Premium, ORS Feroz, TBIO Mestre, TBIO Aton, TBIO Duque, and TBIO Calibre) were evaluated under four seeding rates (250, 300, 350, and 400 viable seeds m−2) in a 12 × 4 factorial arrangement. The experimental design was an 8 × 6 alpha-lattice with three replicates. Measured traits included total tiller number, days to heading, plant height, number of productive tillers, spike length, number of grains per spike, grain yield, thousand-grain weight, and hectoliter weight (test weight).