Variação e associação de características ligadas a formação do grão de genótipos de trigo

Nedel, Jorge Luiz; González, Cirilo Nelson Enrique Molas; Peske, Silmar Teichert

doi:10.1590/s0103-90161999000500029

Cited by 4 publications

(4 citation statements)

References 15 publications

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“…A precocidade é uma característica fundamental para que uma cultivar de trigo possa ser incorporada, de forma expressiva, ao sistema de cultivo utilizado na Região Sul, onde, geralmente, pelo menos duas safras são obtidas por ano, por sucessão de cultivo (NEDEL et al, 1999). A diferença entre cultivares com relação ao seu ciclo de desenvolvimento auxilia na definição de práticas de manejo mais adequadas e na seleção de genótipos apropriados para diferentes regiões (WALTER et al, 2009).…”

Section: Resultsunclassified

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Agronomic variables of interest for the wheat breeding program

Jandrey,

Da Costa,

Do Val

et al. 2024

CLCS

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The objective of this work was to evaluate agronomic variables of interest for the wheat breeding program. A field experiment was conducted with 15 wheat genotypes. The characters evaluated were the time in days to silking, plant height and lodging index. The experimental design used was a randomized block design with three replications, with treatments consisting of three cultivars – CD 150, Frontana and Mirante – and 12 lines obtained from crossings of the cultivar CD 150 with Frontana. The analysis of variance showed a difference between the genotypes evaluated, indicating the presence of genetic variability for all characters, with the number of days to silking and plant height being the characteristics that showed the greatest variability between the genotypes studied. In general, the lines presented a cycle ranging from early to medium, with low plants, which contributed to a lower lodging rate

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Section: Resultsunclassified

“…A precocidade é uma característica fundamental para que uma cultivar de trigo possa ser incorporada, de forma expressiva, ao sistema de cultivo utilizado na região Sul, onde, geralmente, pelo menos duas safras são obtidas por ano, por sucessão de cultivo (NEDEL et al, 1999).…”

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Agronomic variables of interest for the wheat breeding program

Jandrey,

Da Costa,

Do Val

et al. 2024

CLCS

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“…The average air temperature for five years in September was 19.7°C. One of the factors that may influence the length of grain filling is the increase in air temperature, which will increase the rate of grain filling and substantially reduce the length of time between silking and physiological maturity (Nedel et al, 1999).…”

Section: Resultsmentioning

confidence: 99%

Growing degree-day sum and crop growth cycle duration for wheat cultivars at different sowing dates

Noreto¹,

Tsutsumi²,

Costa³

et al. 2015

Afr. J. Agric. Res.

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The wheat Triticum aestivum L. is one of the most important foods in the human diet due to its high nutritional value. The grains can be eaten as bread, noodles, pasta, cookies, among others. The cultivation of wheat in Brazil has high production potential; the southern is region responsible for the largest acreage in the country, due to its soil and climate more favorable for crop development. The objective of this study was to determine the growing degree-days sum and the relationship between the period length from sowing to physiological maturity and sowing dates of thirteen wheat cultivars. The data on wheat crop correspond to the harvests of 2007 to 2011. The treatments consisted of 13 wheat cultivars and 3 sowing dates. The data used for the analysis were: Total elapsed days from sowing to silking, to physiological maturity, and of the silking to physiological maturity, along with the growing degree-days sum for these periods, beyond grains yield and hectoliter weight. The results indicate that the average length of sowing to the silking was 71 days. For the period from silking to physiological maturity the average length was 54 days. The increase in length of time from sowing to the silking in cultivars sown in May 25 th was due to the decrease in air temperature. The average of growing degreedays sum between the period from sowing to physiological maturity was 1487. The cultivars that stood out presenting a shorter period of silking to physiological maturity and high productivity were the cultivars CD 114, CD 120, CD 121, CD 122, CD 124 and Onix.

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“…Botucatu, SP, 2010 O efeito da competição por fotoassimilados pode ser observado através da diminuição do número de perfilhos por planta ou da diminuição no enchimento de grãos de trigo (Valério et al, 2008). De acordo com Nedel et al (1999) o rendimento de grãos de trigo é estabelecido em função do número de grãos produzidos e pelo peso de grãos, sem haver, no entanto, correlação entre essas duas características. A plasticidade produtiva do trigo pode ser verificada no presente estudo, no qual é possível observar que a MMG foi determinante para a maior produção de grãos por planta, verificada para o cultivar IAC 375, mesmo com menor número de grãos por espiga.…”

Section: Resultsunclassified

Perfilhamento do trigo em função da aplicação de regulador vegetal

Fioreze¹,

Rodrigues²

2012

Agraria

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RESUMOO potencial genético e o ambiente de cultivo são fatores determinantes para a sobrevivência e o potencial produtivo de perfilhos de trigo. Objetivou-se estudar a emissão, a sobrevivência e o potencial produtivo de perfilhos de trigo submetido à aplicação de regulador vegetal (Ax+GA+CK). O experimento foi conduzido no período de março a julho de 2010, em delineamento experimental de blocos casualizados em esquema fatorial 2 x 2 com cinco repetições. Os fatores constaram de dois cultivares de trigo (IAC 370 e IAC 375) e da aplicação ou não de Ax+GA+CK no início do perfilhamento. A emissão de perfilhos foi avaliada aos 19, 26, 33, 40 e 47 dias após a emergência, nos quais foram determinados os componentes da produção em relação ao colmo principal. O regulador vegetal aumentou a porcentagem perfilhos viáveis quando emitidos na primeira semana após a aplicação. Perfilhos emitidos tardiamente apresentaram baixo potencial produtivo refletido em diferentes componentes do rendimento para cada cultivar. O cultivar IAC 370 apresentou maior número de perfilhos emitidos; contudo, o número de perfilhos viáveis foi maior para o IAC 375.Palavras-chave: Auxina, citocinina, giberelina, Triticum aestivum L. Wheat tillering as affected by ion application of growth regulator ABSTRACTTillers survival and yield potential are genetically determined and strongly influenced by environmental conditions during the emission and establishment stage. This experiment was carried in order to study effects of application of growth regulator (Ax+GA+CK) on tiller survival and yield potential of wheat. The experiment was carried out from March to July 2010. A 2 x 2 factorial randomized block design with five replications was used. Two wheat cultivars (IAC 370 and IAC 375) and application or not of Ax+GA+CK at the beginning of tillering stage were evaluated. Tiller emission were evaluated at five ages (19, 26, 33, 40 e 47 days after emergence) and yield components were determined by each individual structure evaluation, comparing to the main stem. Growth regulator application improved the tiller survival when emitted in the first week after application. Tiller yield potential decreased in late emission periods of tillers in both cultivars tested, influenced by different traits of each cultivar. IAC 370 showed higher tiller emission, however, the number of viable tillers were higher for the IAC 375.

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Variação e associação de características ligadas a formação do grão de genótipos de trigo

Cited by 4 publications

References 15 publications

Agronomic variables of interest for the wheat breeding program

Agronomic variables of interest for the wheat breeding program

Growing degree-day sum and crop growth cycle duration for wheat cultivars at different sowing dates

Perfilhamento do trigo em função da aplicação de regulador vegetal

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