Performance of food-type soybean genotypes and their possibility for adaptation to Brazilian latitudes

Abstract

-This work was conducted at the Universidade Estadual de Londrina (UEL), in Londrina, State of Paraná, Brazil, with the goal to study food-type soybean (Glycine max (L.) Merrill) genotypes performance for use in cultivation or crosses. A total of 104 genotypes were analyzed: 88 were foodtype with large seeds, eight were food-type with small seeds, and eight-grain types adapted cultivars. The experimental plan was in randomized complete block design with four replications, and 12 traits of agronomic importance were considered. Genetic diversity was observed in the food-type germplasm. There were some genotypes with high yield adapted to a normal period of sowing. Soybean genetic improvement programs for direct human consumption in Brazil, either by means of Asiatic pure lines or by means of the incorporation of genes for late flowering in short-day conditions in this lines is highly viable.Index terms: agronomic characters, genetic breeding, germplasm, Glycine max. COMPORTAMENTO DE GENÓTIPOS DE SOJA TIPO ALIMENTO E POSSIBILIDADES DE ADAPTAÇÃO ÀS LATITUDES BRASILEIRAS RESUMO -O presente trabalho foi desenvolvido na Universidade Estadual de Londrina (UEL), emLondrina, PR, com o objetivo de estudar o comportamento de genótipos de soja (Glycine max (L.) Merrill) tipo alimento, para posterior uso como cultivares ou em cruzamentos. Foram avaliados 104 genótipos, sendo 88 do tipo alimento, de sementes grandes, oito do tipo alimento, de sementes pequenas, e oito adaptados, tipo grão. O delineamento foi o de blocos completos ao acaso, com quatro repetições, considerando 12 caracteres de importância agronômica. Foi observada uma grande diversidade genética no germoplasma tipo alimento, havendo genótipos com alta produtividade e adaptados para época normal de semeadura. Programas de melhoramento genético da soja para consumo humano direto, no Brasil, são viáveis, seja pelo uso direto de linhagens asiáticas, seja por meio da incorporação de genes para florescimento tardio, em dias curtos, nestas linhagens.Termos para indexação: caracteres agronômicos, melhoramento genético, germoplasma, Glycine max.

Comparison between the SPD and the SPDS methods for segregating generation advancement in soybean

“…This grade scale varied from one to five, in which one corresponded to a bad plant and five to an excellent one. It represents a visual rate of the plant global merit for a series of adaptative traits such as: number of pods; plant strength and health, resistance to lodging, shattering resistance, and reducted leaf retention after maturity (Guerra et al, 1999). The SPDS method caused a reduction in the population size by the elimination of inferior genotypes, before time and effort were spent on reaching homozygosis.…”

Climatic Conditions and Production of Soybean in Northeastern Brazil

“…(39 days).The significant factor is to allow enough time for node production, since nodes are plant structures from which pods, seeds, and yield are made. This has been demonstrated in research conducted by [19] in which yield was shown to be related to the number of nodes formed. Cultivar Black Alliance had the most at 33, while Kanro had the fewest at 8.…”

Physiological quality in seeds obtained by topcrosses between vegetable soybean and grain type

“…In the work of Guerra et al (1999) the results indicated that some soybean food type can be competitive in terms of production in relation to the adapted grain type, this fact is important, therefore in this way, in many soybean food type will have only the necessity to correct physiological quality problem in the seeds, not the productivity.…”