Variabilidade de genótipos de milho quanto à composição de carotenoides nos grãos

Cardoso, Wilton Soares; Paes, M. C. D.; Galvão, João Carlos Cardoso; Rios, Sara de Almeida; Guimarães, P. E. de O.; Schaffert, R. E.; Borém, Aluízio

doi:10.1590/s0100-204x2009000200008

Cited by 24 publications

(21 citation statements)

References 13 publications

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“…A utilização de técnicas multivariadas para estimar a divergência genética, tem se tornado comum entre os melhoristas de plantas, em diferentes espécies, como é o caso do melhoramento do feijão (ELIAS et al, 2007;BONETT et al, 2006), da aveia (KUREK et al, 2002;LORENCETTI, et al, 2006), do pimentão (OLIVEIRA; SCAPIM; CASALI, 1998), da mandioca-de-mesa (ZUIN, et al, 2009), bem como no do milho (FUZATTO et al, 2002;MORO;SILVEIRA;CARGNELUTTI FILHO, 2007;CARDOSO et al, 2009). …”

Section: Introductionunclassified

Divergência genética em milho de primeira e segunda safra

2012

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ResumoO objetivo deste trabalho foi estimar a divergência genética entre 19 híbridos simples de milho cultivados na safra de verão e safrinha. Foram instalados dois experimentos no município de Rio Verde, Goiás, sendo um na safra 2007/2008 e outro na safrinha 2008/2008. Ambos os experimentos foram conduzidos em espaçamento entre linhas reduzido de 0,5 m, com população aproximada de 65.000 e 55.000 plantas por hectare na safra e safrinha respectivamente, utilizando-se o delineamento blocos casualizados com 3 repetições. Foram avaliados os seguintes caracteres: altura de plantas, altura de inserção da espiga, comprimento de pendão, índice de área foliar, número de fileiras de grãos por espiga, número de grãos por fileira, massa de mil grãos e produtividade de grãos. A divergência genética foi estimada a partir das distâncias de Mahalanobis e os híbridos foram agrupados pelos métodos de otimização de Tocher e das médias aritméticas não-ponderadas (UPGMA). Constatou-se maior divergência genética entre os híbridos 2A525 e DKB177 e entre P30K64 e DKB177, na safra verão e safrinha respectivamente. Os índices de dissimilaridade observados nas duas safras sugerem a obtenção de maior heterose pelo cruzamento de linhagens extraídas dos híbridos AG8060, P30F35, 2B587, AG7088 e DKB390 com linhagens extraídas dos híbridos AG7000 e DKB177. Palavras-chave: Zea mays L., grupo heterótico, UPGMA, extração de linhagens AbstractThe objective of this study was to estimate the genetic divergence among 19 corn hybrids growing at the summer and "safrinha" season. Two experiments were carried out in Rio Verde, Goias, in the 2007/2008 and 2008/2008 season. Both experiments were conducted at reduced spacing of 0.5 m, with population density of about 65,000 plants per hectare at summer and "safrinha" season respectively, using a randomized block design with three replications. Were evaluated the following characters: plant height, ear height, length of tassel, leaf area index, number of kernels rows per ear, number of kernels per row, thousand grain weight and grain yield. The genetic divergence was estimated from Mahalanobis dissimilarity and the hybrids were grouped by the methods of Tocher and non-weighted arithmetic averages (UPGMA). The results show greater genetic divergence between hybrids 2A525 and DKB177 and between P30K64 and DKB177 at the summer and "safrinha" season respectively. The indexes of dissimilarity observed in both seasons suggest the achieving of greater heterosis by crossing lines from the hybrids AG8060, P30F35, 2B587, AG7088 and DKB390 with lines from the hybrids AG7000 and DKB177.

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Section: Introductionunclassified

Divergência genética em milho de primeira e segunda safra

2012

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“…Genetic breeding of sweet corn has enabled the obtaining of varieties with concentration of pro vitamin A higher than 13 μg g -1 (Cardoso et al, 2009). When assessing the genetic diversity among corn genotypes as to carotenoid content, Rios et al (2011), obtained averages of 15.38 to 26.90 μg g -1 for total carotenoids and of 1.50 to 2.32 μg g -1 for pro vitamin A carotenoids.…”

Section: Sweet Corn (Z Mays L)mentioning

confidence: 99%

Vegetable breeding as a strategy of biofortification in carotenoids and prevention of vitamin A deficiency

Ronaldo¹,

Ronaldo²,

Cleverson³

et al. 2017

Afr. J. Agric. Res.

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Carotenoids are a class of yellow-orange-red pigments distributed in various fruits, spices, herbs and especially in vegetables. These pigments are bioactive components essential to human health. Among the numerous classes of carotenoids, a smaller number is known for having provitamin A activity. This vitamin is essential to the organism in the proper functioning of the vision and the immune system. On the other hand, the deficiency in this vitamin is related to a great number of diseases, which can in severe cases, lead to death. This makes essential the proper supplying of this vitamin to human nutrition. There are two sources from which vitamin A can be derived: (a) vitamin A preformed with retinol esters from animal food sources and (b) from carotenoid found in plant foods. Thus, food fortification is presented as an alternative to reduce vitamin A deficiency. Currently, plant breeding has contributed to the development and introduction of biofortified products. Improved varieties obtained from biofortification have a higher content of nutrients and vitamins, leading to the improvement of human diet. The genetic breeding of vegetables aiming nutritional biofortification is a promising strategy for the increasing of carotenoid concentration in agricultural products and prevention of vitamin A deficiency. Besides the crops that have commonly been used in the biofortification programs, a series of horticulture crops are also promising for insertion in the programs of biofortification in pro vitamin A. Thus, the objective of this review is addressing the problems resulting from vitamin A deficiency and the adoption potential of horticulture species by genetic breeding programs aiming the biofortification in carotenoids.

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“…The evaluation of the divergence in both growing periods is important for lower the possibility of getting misinformation, since the environmental variability have to be considered in these studies. (CARGNELUTTI FILHO et al, 2008). Table 7.…”

Section: Brs-336 and Ftm-709mentioning

confidence: 99%

“…The use of agronomic characters and multivariate techniques is common for plant breeding of different crops, such as maize (MORO; SILVEIRA; CARGNELUTTI FILHO, 2007, CARDOSO et al, 2009SIMON;KAMADA;MOITEIRO, 2012;MIRANDA, 2003), common bean (ELIAS et al, 2007;BARELLI et al, 2009;CORREA;GONÇALVES, 2012), castor bean (RODRIGUES et al, 2010) and cassava (ZUIN et al, 2009). According to Hallauer and Miranda Filho (1981), in addition to the high genetic divergence, the plant performance related to the desired characteristics in the desired environment is greatly important for choose the plant parents, in order to successfully obtaining superior lines.…”

Section: Introductionmentioning

confidence: 99%

Genetic Divergence Among Cotton Genotypes Grown in the Main Season and Off Season

Gílio

Araújo²,

Krause³

et al. 2017

Rev. Caatinga

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-The objective of this work was to evaluate the agronomic performance and estimate the genetic divergence of 18 cotton genotypes grown in the main season (sowed in December, 2012) and off season (sowed in January, 2013), considering their agronomic characteristics and resistance to Ramularia leaf spot. A randomized block experimental design was used, with five replications. The characteristics evaluated were plant height, first branch height, position of first fruiting branch, height of first fruiting branch, length between nodes, number of nodes, average number of bolls per plant, average boll weight, area under the disease progress curve (AUDPC) related to the Ramularia leaf spot severity, weight of 100-seed from the plant middle third, fiber percentage, average production per plant, yield and cotton fiber quality. The results were subjected to individual and joint analysis of variance and the genetic divergence was estimated according to multivariate procedures (Mahalanobis' generalized distance and Tocher's optimization method). The dissimilarity matrices were summed to estimate the genetic divergence, considering both growing periods. Genetic variability was found among the genotypes evaluated, in both the main season and off season. The characteristic that most contributed to the genetic divergence in the main season was the production per plant and, in the off season, was the fiber percentage. According to the results of the present work, the crosses between the genotypes BRS- 335 and FMT-707; FM-910 and FMT-707; and IMA-08-12427 and FMT-707 are recommended.

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Variabilidade de genótipos de milho quanto à composição de carotenoides nos grãos

Cited by 24 publications

References 13 publications

Divergência genética em milho de primeira e segunda safra

Divergência genética em milho de primeira e segunda safra

Vegetable breeding as a strategy of biofortification in carotenoids and prevention of vitamin A deficiency

Genetic Divergence Among Cotton Genotypes Grown in the Main Season and Off Season

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