Association between physiological and agronomic traits and selection of tropical wheat

Mezzomo, Henrique Caletti; Casagrande, Cleiton Renato; Silva, Caíque Machado e; Borém, Aluízio; Nardino, Maicon

doi:10.1007/s12892-020-00069-y

Cited by 9 publications

(7 citation statements)

References 22 publications

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“…The second canonical pair evidence relationships in the opposite direction between DH and, HW and HGM (Table 2). Contrary to what was reported by MEZZOMO et al (2021), these results indicated that earlier cultivars have higher values for hectoliter weight and 100-grain mass. Thus, the cycle Table 1 -likelihood Ratio Test, variance components and genetic parameters of 90 wheat genotypes for the traits spike height (SH), plant height (PH), days for heading (DH), number of spikelets per spike (NSS), spike weight (SW), number of grains per spike (NGS), grain mass per spike (GMS), 100-grain mass (HGM), hectoliter weight (HW) and grain yield (Gy).…”

Section: Resultscontrasting

confidence: 99%

“…Although, the use of canonical correlations has been reported in the literature (CARVAlHO et al, 2015), few studies are based on the use of genotypic values for investigation of associations between traits. (MEZZOMO et al, 2021). This should be prioritized, in view of the reduction of noise provided by the effect of the environment and the possibility of success and progress in improvement (CRUZ et al, 2012).…”

Section: Biologymentioning

confidence: 99%

“…The last pair also shows an association in the same direction between NGS and HW, indicating that the increase in the number of grains per spike leads to an increase in hectoliter weight. According to MEZZOMO et al (2021), the hectoliter weight can be used as an indirect selection criterion for the increase of physiological traits, such as the intracellular concentration of carbon dioxide (CO 2 ). This would lead to an increase in the CO 2 diffusion capacity, associated with a higher photosynthetic rate of plants.…”

Section: Parametersmentioning

confidence: 99%

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Canonical correlations between high and low heritability wheat traits via mixed models

et al. 2023

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Canonical correlation analysis based on genotypic correlations allows determining the associations between groups of traits and carrying out the direct or indirect selection of superior genotypes. This study investigated the existence of linear and multivariate relationships between high and low heritability traits via canonical correlation analysis based on genotypic correlations. The experiment was conducted at the Professor Diogo Alves de Melo Experimental Field at the Universidade Federal de Viçosa, in Viçosa, MG. 90 wheat cultivars were evaluated under a 9 × 10 alpha-lattice design, with three replications and plots consisting of four rows of three meters spaced at 0.20 meters. Canonical groups were established between spike height and plant height, days for heading, number of spikelets per spike, and number of grains per spike (Group I) and, spike weight, spike grain mass, 100-grain mass, hectoliter weight, and grain yield (Group II). There was dependence between the established groups, which allowed the investigation of the relationships between traits based on their genotypic values. The traits cycle and plant height can be used for indirect selection of genotypes superior in hectoliter weight and grain yield, which are important factors for industries and farmers.

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Section: Resultscontrasting

confidence: 99%

Section: Biologymentioning

confidence: 99%

Section: Parametersmentioning

confidence: 99%

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Canonical correlations between high and low heritability wheat traits via mixed models

et al. 2023

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“…(2019) obtained balanced selection gains, but positive for PH in both indexes, by applying the classic Smith (1936) and Hazel (1943) index and the sum of ranks Mulamba and Mock (1978) index in wheat F 6 genotypes. This condition is especially undesired in irrigated systems (Mezzomo et al., 2020). Therefore, breeders seek to decrease wheat susceptibility to lodging by selecting shorter genotypes.…”

Section: Discussionmentioning

confidence: 99%

Parental selection proposal strategy for recurrent selection in tropical wheat breeding

Signorini,

e Silva,

Lima

et al. 2023

Agronomy Journal

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Recurrent selection is an effective breeding method for improving complex traits in wheat (Triticum aestivum L.) breeding. In this study, we propose a genitor selection strategy, employing a multi‐trait selection approach and genetic diversity analysis. To evaluate our proposed method, we conducted a lattice design trial during the winter seasons of 2020 and 2021 in Viçosa, MG, Brazil, comprising 87 lines and 13 commercial cultivars. It was assessed various traits such as plant height, days to heading, wheat leaf rust, tan spot of wheat, a hundred grain mass, hectoliter weight, and grain yield, and the best linear unbiased predictor (BLUP) was obtained for each trait via restricted maximum likelihood (REML). Next, a genotypic distance matrix, derived from principal component analysis using the BLUP values, was computed to perform hierarchical clustering via the unweighted pair group method with arithmetic mean. The selection of superior genotypes was made utilizing the multi‐trait genotype‐ideotype distance index (MGIDI), resulting in the identification of eight lines and two commercial cultivars as candidates. Furthermore, the genetic diversity analysis revealed distinct clusters among the selected genotypes. To assess the divergence of the chosen genitors, this study proposes a complementarity matrix using factor analysis. Our results indicate that this selection strategy effectively directed the identification of the best and divergent genitors. The complementarity matrix developed in this paper to evaluate the crossings proposal can also be used to evaluate combinations in any panel selected via a multi‐trait approach and can be easily applied and interpreted by breeders of various programs.This article is protected by copyright. All rights reserved

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“…No entanto, de acordo com Pimentel (2013b), a seleção de genitores em trigo pode ser baseada na CGC, principalmente em gerações avançadas (F2 ou F3), tendo em vista a redução dos desvios de dominância a cada geração, o que permite inferir de forma mais acurada sobre as estimativas de CGC. Essas evidências permitem selecionar populações segregantes que expressem potencial genético satisfatório para a realização de estudos específicos com possibilidade de difundir genótipos adaptados para as condições edafoclimáticas do Cerrado brasileiro, considerando a capacidade geral de combinação dos genitores, principalmente para o rendimento de grãos, um caráter quantitativo, determinado por vários componentes associados, como alguns analisados neste estudo (BORNHOFEN et al, 2013;GRAMAJE et al, 2020;MEZZOMO et al, 2021;PIMENTEL et al, 2013a).…”

Section: Resultsunclassified

Potencial genético de genitores e populações segregantes de trigo tropical

Lima¹

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A estimação da capacidade de combinação de genitores é uma importante ferramenta para a seleção de populações segregantes promissoras com potencial de originar genótipos que possam ser recomendados para regiões com distintas condições edafoclimáticas e que expressem o máximo potencial genético. Este trabalho objetivou avaliar o potencial genético de genitores e populações segregantes de trigo (Triticum aestivum L.) tropical. Os cruzamentos, o avanço de geração e a avaliação das populações segregantes foram realizados no Campo Experimental Professor Diogo Alves de Melo, da Universidade Federal de Viçosa, Viçosa, MG. Para os cruzamentos, o esquema dialélico parcial (4 x 5) foi realizado em 2020 em casa de vegetação, considerando os seguintes cultivares: TBIO Aton, TBIO Duque, TBIO Astro e TBIO Toruk (genitores do grupo 1) e; RBO 2B5, ORS Citrino, ORS Madrepérola, ORS Destak e RBO 3B6 (genitores do grupo 2). No verão de 2021 foi realizado o avanço de geração e durante a safra de inverno de 2021, os nove genitores e as 20 populações F 2 foram conduzidos sob o delineamento de blocos casualizados com duas repetições. Os caracteres avaliados foram espigamento (ESPIG, dias), altura de planta (AP, cm), mancha amarela (MA, 1 a 5), ferrugem (FER, 0 a 4), número de espiguetas por espiga (NEspE, unidade), massa de cem grãos (M100, g) e rendimento de grãos (RG, kg.ha -1 ). Os dados foram submetidos à análise de variância, dialélica e comparação de médias pelo teste de Dunnett a 5% de probabilidade. O efeito da capacidade geral de combinação (CGC) foi significativo para ESPIG, FER e M100 e, FER, NEspE e RG nos grupos 1 e 2, respectivamente. Os genitores que apresentaram maiores contribuições com as estimativas da CGC em magnitude e direção desejada foram: TBIO Astro (ESPIG), ORS Citrino (AP), TBIO Astro, TBIO Toruk e ORS Destak (MA), TBIO Toruk (FER), RBO 3B6 (NEspE), TBIO Astro (M100) e ORS Destak (RG). Houve efeito significativo da capacidade específica de combinação para M100, com maiores estimativas apresentadas pelos cruzamentos TBIO Aton x ORS Madrepérola, TBIO Duque x RBO 3B6, TBIO Astro x ORS Madrepérola e TBIO Toruk x RBO 3B6, com destaque para TBIO Aton x ORS Madrepérola e TBIO Astro x ORS Madrepérola em que pelo menos um dos genitores apresenta alta CGC para o referido caráter. Foram obtidas diferenças significativas (p<0,05) entre as médias das combinações híbridaspara a maioria dos caracteres, com exceção de FER, porém estas não superaram a testemunha em sentido desejável. Houve predominância do efeito aditivo dos genes envolvidos na determinação dos caracteres para o conjunto de genitores analisados. É possível selecionar genitores para uso em cruzamentos com grupos complementares visando o desenvolvimento de populações segregantes de trigo tropical com elevado potencial genético a partir de estimativas da CGC em magnitude e sentido favoráveis para incrementos nos caracteres desejados. Os genitores TBIO Astro e ORS Destak são promissores para derivação de linhagens de trigo tropical com elevado potencial genético. Palavras-chave: Capacidade de combinação. Dialelo em trigo. Triticum aestivum L.

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Association between physiological and agronomic traits and selection of tropical wheat

Cited by 9 publications

References 22 publications

Canonical correlations between high and low heritability wheat traits via mixed models

Canonical correlations between high and low heritability wheat traits via mixed models

Parental selection proposal strategy for recurrent selection in tropical wheat breeding

Potencial genético de genitores e populações segregantes de trigo tropical

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