Magnitude of the genetic base of commercial popcorn and in recommendation in Brazil

Paula, Thiago Otávio Mendes de; Gonçalves, Leandro Simões Azeredo; Júnior, Antônio Teixeira do Amaral; Oliveira, Érica Cristina de; Silva, Vanessa Quitete Ribeiro da; Scapim, Carlos Alberto; Lopes, Ana Daniela

doi:10.1590/s1984-70332010000400002

Cited by 14 publications

(6 citation statements)

References 23 publications

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“…Nevertheless, commercial cultivation is modest, as a consequence of the lack of high quality genotypes, unlike in the case of common corn (Zea mays L.). However, consumption has increased in Brazil over the years, making the crop attractive to farmers (Paula et al, 2010;Moterle et al, 2012;Gonçalves et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Diallel analysis of popcorn populations for yield, popping expansion and resistance to fall armyworm

et al. 2020

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The objective of this study was to estimate the varietal and heterotic effects related to grain yield, popping expansion and resistance of popcorn against fall armyworm. Twelve open-pollinated varieties were intercrossed in a complete diallel mating scheme. The 66 experimental hybrids, together with their parents and controls Zapalote Chico, BRS 1030 and IAC 125, resulted in a total of 81 treatments, evaluated in an experiment in a 9x9 triple-square lattice design, in Maringá-PR and Araruna-PR. The data were analyzed according to the diallel model of Gardner and Eberhart (1966). The following traits were evaluated: grain yield (GR); mean plant height (PH) and insertion height of the highest ear in the stem (EI); silking (SIL); final plant density (FD) and popping expansion (PE). Variety PR 023 is indicated for intrapopulation improvement for grain yield. Regarding popping expansion, the results indicated cross SAM x UNB 2U C5 for recurrent reciprocal selection. In relation to resistance to fall armyworm, the varieties PARA 172, PA 091, PR 023, and SE 013 were selected for intrapopulation improvement. On the other hand, the crosses PARA 172 x BOZM 260, PA 091 x BOYA 462 and SAM x UNB 2U C5 can be indicated for interpopulation improvement.

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Section: Introductionmentioning

confidence: 99%

Diallel analysis of popcorn populations for yield, popping expansion and resistance to fall armyworm

et al. 2020

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“…Portanto, o desenvolvimento de programas de melhoramento que vise disponibilizar variedades e, ou híbridos com elevado potencial agronômico torna-se primordial para o fomento do agronegócio do milhopipoca (PAULA et al, 2010;SCAPIM et al, 2010 O programa de melhoramento de milho-pipoca da UENF vem atuando, desde 1998, em duas vertentes: emprego de seleção recorrente na população UNB-2U visando elevar a frequência dos alelos favoráveis (PEREIRA; AMARAL JÚNIOR, 2001); e implementação de dialelos para identificar híbridos superiores e genitores para a formação de compostos (FREITAS JÚNIOR et al, 2006;RANGEL et al, 2008;SILVA et al, 2011). Atualmente este programa dispõe de cultivares promissoras para avaliação de ensaios de valor de cultivo e uso (VCU).…”

Section: Introductionunclassified

Seleção de pré-cultivares de milho-pipoca baseado em índices não-paramétricos

Vittorazzi¹,

Júnior²,

Gonçalves³

et al. 2013

Rev. Ciênc. Agron.

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RESUMO -O presente trabalho teve como objetivo fazer uma seleção prévia de pré-cultivares de milho-pipoca para o registro no MAPA, com base em diferentes caracteres, utilizando o índice de Garcia e o de soma de classificação, priorizando-se o rendimento de grãos e capacidade de expansão. Foram avaliados 16 genótipos de milho-pipoca, sendo oito variedades de polinização aberta (BRS Angela, UFVM2 -Barão de Viçosa, Viçosa, Beija-Flor, SAM, UNB2U-C3, UNB2U-C4 e UNB2U-C5) e oito híbridos (Zelia, Jade, IAC 112, P 1 x P 3 , P 1 x P 7 , P 2 x P 4 , P 2 x P 9 e P 3 x P 7 ), em cinco ambientes. O delineamento experimental adotado foi blocos ao acaso, com três repetições, tendo sido avaliadas as características altura de planta, estande, tombamento, capacidade de expansão e rendimento de grãos. Os efeitos dos genótipos e ambientes foram significativos para todas as características, enquanto que suas interações o foram apenas para tombamento e rendimento de grãos. Os índices de Garcia e da soma de classificação foram positivamente correlacionados na classificação dos genótipos, ambos permitindo indicar as pré-cultivares UNB2U-C5 e P 1 x P 7 como as de melhor desempenho para regiões Norte e Noroeste do Estado do Rio de Janeiro. Palavras-chave: Zea mays L. Valor de cultivo e uso. Características agronômicas. Capacidade de expansão.ABSTRACT -The present study aimed to select pre-cultivars of popcorn maize for registration in MAPA based on different characteristics, using the Garcia and total-classification indices, giving priority to grain yield and expansion capacity. Sixteen genotypes of popcorn maize: eight open-pollinated varieties (BRS Angela, UFVM2 -Barão de Viçosa, Viçosa, Beija-Flor, SAM, UNB2U-C3, UNB2U-C4 and UNB2U-C5) and eight hybrids (Zelia, Jade, IAC 112, P 1 x P 3 , P 1 x P 7 , P 2 x P 4 , P 2 x P 9 and P 3 x P 7 ) were evaluated in five environments. The experimental design was of randomized blocks with three replications, where the characteristics of plant height, growth, droop, expansion capacity and grain yield were evaluated. The effects of genotype and environment were significant for all characteristics, while their interactions were only significant for droop and grain yield. The Garcia and the total-classification indices correlated positively in the classification of genotypes, both indicating the pre-cultivars UNB2U-C5 and P1 x P7 as having the best performance for regions in the north and northwest of the state of Rio de Janeiro.

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“…Of the 41 populations evaluated, 15 had plant height less than 2.5 meters. In the work of Paula et al (2010), evaluating ten popcorn genotypes, among them inbred lines of the Federal University of Viçosa, open pollination cultivars and hybrids, did not find materials higher than 1.90 meters. Of the ten, only one genotype had white grains; all the others had yellow-colored grains.…”

Section: Discussionmentioning

confidence: 95%

“…The limited genetic diversity of popcorn among modern cultivars and the little diversity represented in the main germplasm banks in the country have restricted the advances in popcorn breeding programs in Brazil (Silva et al, 2015) One of the ways to make breeding programs more efficient is to expand genetic diversity, and therefore, the identification of genetically contrasting materials with potential variability for selection is fundamental, being one of the pillars of breeding. Thus, the qualification and quantification of the genetic diversity present in germplasm banks, based on agronomic, morphological, biochemical and molecular characteristics, allow to define the priorities of activities related to the conservation of germplasm, participatory genetic breeding as well as to know the potential of using this germplasm in conventional genetic improvement programs (Munhoz, Priori, Amaral Júnior, Scapim, & Simon, 2009;Paula et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Relationship between phenological and morphological characteristics of plant with popcorn races of a diversity microcenter in southern Brazil

Júnior

Ogliari

Maghelly

et al. 2021

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The far west region of Santa Catarina (FWSC) state in southern Brazil was indicated as a microcenter of diversity of the Zea genus. In this region, local popcorn varieties are grown in small areas, but in a significant number of farms. The present study aimed to characterize the diversity of 41 local populations from that region, based on phenology and morphological characters of plant, ear and grain. Therefore, an experimental design of complete randomized blocks with two replications was conducted. The data allowed to identify a rich diversity of popcorn in the FWSC for the characteristics of plant, ear, and grain, as well as for the phenology. For the color, 20 populations presented white grain, nine black, nine yellow, two red and one orange. Regarding the cycle, all varieties of yellow and round grains were considered hyper early/early and the varieties of white grains, intermediate/late. Average plant height varied from 1.8 to 3.2 m, while the weight of one thousand kernels varied from 80.9 to 200.4 g. The accumulated day degrees for tasseling ranged from 689.05 to 1,090.57. Based on the cluster analysis of qualitative and quantitative characters, three groups were formed, and five populations were isolated. The inclusion of plant characteristics and phenology can be an important and complementary tool for studies in popcorn races. Trends in some plant characteristics were observed within popcorn varieties with the same grain features. This result is important information for popcorn genetic breeding strategies.

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Magnitude of the genetic base of commercial popcorn and in recommendation in Brazil

Abstract: -The purpose of this study was to quantify the genetic diversity among popcorn genotypes on the market and in

Cited by 14 publications

References 23 publications

Diallel analysis of popcorn populations for yield, popping expansion and resistance to fall armyworm

Diallel analysis of popcorn populations for yield, popping expansion and resistance to fall armyworm

Seleção de pré-cultivares de milho-pipoca baseado em índices não-paramétricos

Relationship between phenological and morphological characteristics of plant with popcorn races of a diversity microcenter in southern Brazil

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