Novos compostos de milho-pipoca para o Brasil

Scapim, Carlos Alberto; Júnior, Antônio Teixeira do Amaral; Vieira, Rafael Augusto; Moterle, Lia Mara; Teixeira, Leandra Regina; Viganó, Joselaine; Júnior, Gilberto Barbosa Sandoval

doi:10.5433/1679-0359.2010v31n2p321

Cited by 16 publications

(16 citation statements)

References 22 publications

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“…Therefore, in comparison with the controls, which are commercial hybrids prominent in the Brazilian market, the populations used in this study have high productive potential. Matta and Viana (2003), Scapim et al (2010), and Vieira et al (2009) used the hybrid IAC-112 and/or IAC-125 as the controls (consistent with those used in the present study) and observed superiority of these hybrids in their studies; however, these hybrids were not superior to the different selection cycles of the present study, which confirms the productive potential of the populations.…”

Section: Resultscontrasting

confidence: 46%

Estimate of genetic gain in popcorn after cycles of phenotypic recurrent selection

et al. 2016

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ABSTRACT. Popcorn is widely consumed in Brazil, yet there are few breeding programs for this crop. Recurrent selection (RS) is a viable breeding alternative for popcorn; however, the gains achieved must be frequently checked. The aim of this study was to assess the effect of selection for grain type (round and pointed) after four cycles of phenotypic RS on the main agronomic traits of popcorn, to estimate the genetic gain achieved for the trait of expansion volume (EV), and to obtain estimates of phenotypic correlations for the main traits of the crop in the UFLA E and UFLA R populations. The zero, one, two, and three cycles of the UFLA E and UFLA R populations, the fourth cycle, and the controls IAC-112 and IAC-125 were used. The experiments were conducted at the experimental farm of Universidade Federal de Lavras (UFLA; Environment 1) and at the experimental area of the Genetics and Plant Breeding Sector of the Department of Biology at UFLA (Environment 2) in the 2010/11 crop season. Nine agronomic traits were evaluated, including EV and grain yield (GY). The UFLA R and UFLA E populations showed similar behavior for all evaluated traits. The type of grain did not affect the genetic gain for EV, which was 5 and 3.7% in each cycle carried out in the UFLA E and UFLA R population, respectively. Phenotypic selection carried out during recombination for EV is an effective method for increasing expression of the trait. EV and GY did not show a linear association.

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Section: Resultscontrasting

confidence: 46%

Estimate of genetic gain in popcorn after cycles of phenotypic recurrent selection

et al. 2016

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“…Popcorn breeding programs in Brazil have emerged with the use of intra and interpopulational recurrent selection to increase productivity and popping expansion (Daros et al 2004;Faria et al 2008;Freitas Júnior et al 2009;Amaral Júnior et al 2010); composite obtainment (Rangel et al 2008;Vieira et al 2009a;Scapim et al 2010); evaluation and introduction of disease resistance in commercial materials (Miranda et al 2002;Vieira et al 2009b); evaluation of the genetic diversity for agronomical traits and molecular markers (Dandolini et al 2008;Miranda et al 2008;Munhoz et al 2009;Leal et al 2010;Trindade et al 2010); use of in vitro culture (Ricci et al 2007;Fernandes et al 2008); hybrids obtainment and its evaluation (Vieira et al 2009c;Vieira et al 2009a;Silva et al 2010).…”

Section: Introductionmentioning

confidence: 98%

Combining ability of popcorn lines for seed quality and agronomic traits

et al. 2011

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Popcorn breeding programs in Brazil have emerged but despite some advances there is still a lack of material performance studies specially regard to seed quality, in different agricultural seasons. This research was carried out to estimate the popcorn combining ability from biparental crosses between eight tropical and one temperate lines in two agricultural seasons (2008 and 2009) with regard to eight traits related to seed quality, in addition to three agronomic traits related to popping expansion. Method 4, proposed by Griffing (Model 1), was used to verifying the importance of the dominance effect in the genetic control of the seed quality traits, favouring the identification of superior hybrids through seed tests in the laboratory with low cost. The lines from Zélia and CMS42 were promising in obtaining hybrids with superior seed quality and greater popping expansion. The hybrids Zélia 9 IAC-112, CMS42 9 UEM M2-1, CMS43-1 9 IAC-112 and UEM M2-2 9 Zaeli expressed superior SCA for grain yield, popping expansion and at least two seed quality traits. These hybrids are materials of interest for cultivation in different planting seasons.

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“…A capacidade de expansão também apresentou valores aceitáveis para a experimentação agrícola (respectivamente, 12,5% e 13,8%), quando comparada com outros autores (DAROS; AMARAL JÚNIOR; PEREIRA, 2004;FREITAS JÚNIOR et al, 2006;RANGEL et al, 2007;SCAPIM et al, 2010;MILANI, 2011 : heterose do cruzamento da i-ésima família S 2 com o testador 'j'; do teste F. Quando necessário, as médias obtidas foram ajustadas, levando-se em consideração a recuperação da informação interblocos. Por meio das médias dos tratamentos ajustados foi realizada a análise em dialelo parcial, utilizando o modelo proposto por Griffing (1956), adaptado por Geraldi e Miranda Filho (1988) aos cruzamentos dialélicos parciais, em que foram avaliadas pq combinações híbridas sendo p famílias S 2 (Grupo I) e q testadores (Grupo II).…”

Section: Resultsunclassified

Avaliação da capacidade de combinação de famílias S2 de milho-pipoca por meio de diferentes testadores

Barreto¹,

Scapim²,

Júnior³

et al. 2012

Sem. Ci. Agr.

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ResumoO objetivo deste trabalho foi comparar três testadores para a discriminação e avaliação da capacidade combinatória de 49 famílias S 2 , oriundas do híbrido de milho-pipoca IAC 125. As famílias foram avaliadas por seu desempenho per se e em seus cruzamentos com os testadores BRS ANGELA, IAC 125 e Linhagem 3.3. O experimento foi conduzido em látice simples, em Maringá, PR, no ano agrícola 2007/2008. Os parâmetros genéticos e fenotípicos de capacidade de expansão e rendimento de grãos foram obtidos e comparados entre si por meio das estimativas procedentes das progênies obtidas, isto é, dos topcrosses com cada testador e das famílias S 2 per se. As capacidades geral e específica de combinação foram estimadas segundo o modelo de dialelo parcial. Foram avaliadas também as heteroses dos topcrosses em relação aos testadores per se, a capacidade de discriminação dos testadores comparada por meio do índice de diferenciação e desempenho proposto por Fasoulas (1983). O testador mais adequado para avaliar as famílias S 2, em relação do rendimento de grãos e capacidade de expansão foi a linhagem 3.3. Palavras-chave: Topcross, dialelo parcial, índice de Fasoulas, comportamento híbrido AbstractThe objective of this work was to compare three testers for discrimination and evaluation of the combining ability of 49 S 2 families, derived from the topcross popcorn hybrid IAC 125. Families were evaluated by their per se performance and their crosses with the testers BRS ANGELA, IAC125 and Line 3.3. The experiment was conducted in lattice design, in Maringá, PR, Brazil, during 2007/2008 cropping season. Genetic and phenotypic parameters was estimated for grain yield and popping expansion, and compared using the topcrosses between families and testers and the families per se. General and specific combining ability were estimated according the partial diallel model. Topcrosses heterosis was also evaluated, and the capacity of discriminating the families was compared among testers using the differential index from Fasoulas (1983). The tester line 3.3 was the most suitable to evaluate the S 2 families in respect to grain yield and popping expansion.

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Novos compostos de milho-pipoca para o Brasil

Cited by 16 publications

References 22 publications

Estimate of genetic gain in popcorn after cycles of phenotypic recurrent selection

Estimate of genetic gain in popcorn after cycles of phenotypic recurrent selection

Combining ability of popcorn lines for seed quality and agronomic traits

Avaliação da capacidade de combinação de famílias S2 de milho-pipoca por meio de diferentes testadores

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