Genetic parameters and agronomic characterization of hulless barley accessions under irrigation in the savanna

Abstract

The purpose of this study was to estimate the genetic parameters and to agronomically characterize 18 accessions of hulless barley and three references of covered barley grains belonging to the Embrapa Recursos Genéticos e Biotecnologia germplasm bank, using ten agronomic quantitative traits. The experiment was performed at two sites in Distrito Federal, in May 2012, using the experimental design of randomized blocks with three replicates. The evaluated characteristics were: estimated grain yield, plumpness kernel, thousand seeds weight, plant height, lodging, days to heading, hectoliter weight, and grain protein content. The obtained data were subjected to the variance analysis and the grouped means by Scott-Knott test. Significant differences at 1% of probability were found among the accessions for all the evaluated traits. It is possible to obtain genetic gains due to the high values of the genotypic coefficient of variation. High heritability in the broad sense was observed for all the characteristics, except for protein content, enabling the effective selection of traits of interest from the parents to the descendants. The accessions CI 13453, CN Cerrado 1, CN Cerrado 2, CN Cerrado 5 and PI356466 stood out positively among the others to Yield and Lodging.Parâmetros genéticos e caracterização agronômica de acessos de cevada nua sob irrigação no Cerrado RESUMO: O objetivo deste trabalho foi estimar os parâmetros genéticos e caracterizar agronomicamente 18 acessos de cevada nua, e 3 testemunhas de cevada com grãos cobertos pertencentes ao banco de germoplasma da Embrapa Recursos Genéticos e Biotecnologia, utilizando dez caracteres agronômicos quantitativos. O experimento foi realizado em dois locais no Distrito Federal, em maio de 2012, utilizando um delineamento experimental de blocos ao acaso com três repetições. As características avaliadas foram: rendimento de grãos, classificação comercial, peso de mil sementes, altura de plantas, acamamento, ciclo de espigamento, peso hectolítrico e teor de proteína no grão. Os dados obtidos foram submetidos à análise de variância e as médias agrupadas pelo teste de Scott-Knott. Foram detectadas diferenças significativas a 1% de probabilidade entre os acessos para todas as características avaliadas. Há possibilidade de se obter ganhos genéticos devido aos elevados valores do coeficiente de variação genotípico. Foi observada alta herdabilidade em sentido amplo para todas as características, exceto para teor de proteína, possibilitando a seleção efetiva de características de interesse dos genitores para seus descendentes. Os acessos CI 13453, CN Cerrado 1, CN Cerrado 2, CN Cerrado 5 e PI356466 destacaram-se positivamente dos demais para rendimento de grãos e acamamento. Palavras-chave: recursos genéticos; variabilidade genética; herdabilidadeGenetic parameters and agronomic characterization of hulless barley accessions under irrigation in the savanna Rev. Bras. Cienc. Agrar., Recife, v.13, n.3, e5567, 2018 2/8

Comparison and quality evaluation of hull-less and covered Brazilian barley for food industry application

“…Table 1 shows the cultivars accordingly to ecological and agronomical adaptation and its respective site location. The soil in the three site locations is classified as red latosol (Santos et al, 2018). Due to the limited number of seeds, he breeding lines were cultivated with one replication, at one site, Passo Fundo, RS.…”

Genetic variability of irrigated barley in savanna environments based on malting quality

“…Traditionally, barley is produced without irrigation in the southern region of Brazil, where mild temperatures favour its cultivation. However, recent studies at Embrapa Cerrados show the full agronomic potential of the crop under irrigation in the Brazilian savanna, due to high productivity, absence of soil diseases, high straw content and the lack of dormancy after harvest .…”