Seleção De Linhagens De Feijão Com Base No Padrão E Na Qualidade De Sementes

Abstract

RESUMO -A seleção de linhagens de feijão pelo padrão de tegumento, qualidade sanitária e fisiológica de sementes é recente nos programas de melhoramento. Por isso, foram objetivos deste trabalho avaliar se as linhagens de feijão diferem quanto ao padrão de tegumento, a qualidade sanitária e fisiológica de sementes, investigar a associação entre esses caracteres e selecionar linhagens de feijão superiores para a qualidade de sementes. Para tanto, foram avaliadas 16 linhagens de feijão de diferentes obtentores em cultivo de safra agrícola. As linhagens de feijão apresentaram diferença significativa em relação ao peso de mil sementes, coloração do tegumento, conteúdo de lignina, comprimento, largura e espessura das sementes, incidência de Fusarium sp., germinação, primeira contagem de germinação, envelhecimento acelerado, comprimento da parte aérea, da raiz e total das plântulas, massa seca da parte aérea e total das plântulas e emergência de plântulas a campo. A estimativa de correlação positiva foi observada entre a emergência de plântulas a campo e a germinação (r = 0,650), a primeira contagem de germinação (r = 0,600), o envelhecimento acelerado (r = 0,793) e a condutividade elétrica (r = 0,635). A seleção indireta pela germinação, primeira contagem de germinação e envelhecimento acelerado foi eficiente para a identificação de linhagens de feijão com maior emergência de plântulas a campo. A seleção das linhagens TB 02-07, SM 1810, Carioca, LP 08-90, SM 1107, LP 07-80, Pérola, CNFP 10104 e TB 02-24 é recomendada para uso em programas de hibridação controlada para o desenvolvimento de novas cultivares de feijão de alta qualidade de sementes. Palavras-chave: Phaseolus vulgaris L.. Características morfológicas. Qualidade sanitária. Qualidade fisiológica. Variabilidade genética. SELECTION OF COMMON BEAN LINES FOR STANDARD AND QUALITY SEEDSABSTRACT -The selection of common bean lines for seed coat standard, sanitary and physiological quality seed is recent in breeding programs. The objectives of this research were to evaluate if common bean lines differ for seed coat standard, sanitary and physiological quality seed, to investigate the correlation between these characters and to select common bean lines with high seed quality. For this, 16 inbred common bean lines were evaluated in normal rainy growing season. The common bean lines showed significant difference for the weight of thousand seeds, seed coat color, lignin content, length, width and thickness seeds, Fusarium sp. incidence, germination, first germination count, accelerated ageing, length of shoot, root and total of seedling, dry matter of shoot and total of seedling and emergency of seedling in field. A positive correlation coefficient was found between emergency of seedling in field and germination (r = 0.650), first germination count (r = 0.600), accelerated ageing (r = 0.793) and electric conductivity (r = 0.635). The indirect selection by germination, first germination count and accelerated ageing is effective to identify common bean lines with the hig...

Sowing time and physiological potential of bean seeds of different growth types

“…The use of seeds with high physiological potential is related to their ability to perform vital functions, characterized by longevity, germination, and vigor (Cardoso et al, 2012). However, these characteristics may be influenced by the genotype (Mambrin et al, 2015), environmental conditions of its production and season yields (Zucareli et al, 2016).…”

Canonical correlations between agronomic traits and seed physiological quality in segregating soybean populations

“…In this respect, grain yield is one of the traits that are important in soybean improvement. However, it is known that traits related to seed quality are essential to obtain homogenous plant stands in the field, as well as high productivity (Mambrin et al, 2015).…”

Tests for the Selection of Forage Turnip Progeny to Order the Vigor and Longevity of Seeds

“…These characteristics are dependent on genotype, line, and progeny with differences among them as to physiological potential and storage potential (MAIA et al, 2011;VASCONCELOS et al, 2012;MARTINS;MACHADO, 2014;OLIVEIRA et al, 2014;MAMBRIN et al, 2015).…”

“…This information is also used to decide which lots to commercialize first and which to store (CARVALHO; NAKAGAWA, 2012). However, vigor tests may also be used in genetic improvement programs to help in the comparison between lines, varieties, and hybrids as to seed physiological quality (MARCOS-FILHO, 2015;MAMBRIN et al, 2015).…”

“…The research works concerned with the genetic improvement of plants with a view to seed physiological quality in bean (MAIA et al, 2011;MAMBRIN et al, 2015), soybean (VASCONCELOS et al, 2012;MARTINS et al, 2016), carrot (MARTINS; SILVA; MACHADO, 2014), and forage turnip (OLIVEIRA et al, 2014) resulted in high heritability values (larger than 70%) and genetic variability reflecting a favorable situation for the selection for seed physiological potential among plant populations.…”