Indução de mutação visando a redução de altura de planta e resistência às doenças no cultivar de trigo (Triticum aestivum L.) IAC-17

Neto, Augusto Tulmann; Camargo, C.E.O.; Alves, M. C. S.; Castro, Jairo Lopes de; Gallo, Paulo Boller

doi:10.1590/s0103-90161995000200014

Cited by 8 publications

(4 citation statements)

References 3 publications

(4 reference statements)

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“…Similar results were reported by Camargo & Oliveira (1981a), studying BH-1146 under non-limiting nutrient level, Alfree, pH 4.0 solution who reported a higher potential for root growth in these plants, evidencing their specificity for this trait. The use of gamma radiation in seeds of some wheat cultivars generated plants with specific agronomic characteristics, such as tolerance to Al, usually present in acidic soils (Camargo et al, 1997;Tulmann Neto et al, 1995a;1995b;1996 and2001). Most of the published research on this subject has been done in the presence of Al 3+ and has shown that in the wheat early development stages, root growth is affected by temperature, pH, salts and phosphorus concentrations of the nutrient solutions (Ali, 1973;Camargo & Oliveira, 1981a;Camargo, 1983;1984;Moore, 1974;Moore et al, 1976).…”

Section: Introductionmentioning

confidence: 99%

Temperature and pH of the nutrient solution on wheat primary root growth

Camargo

Filho

Salomon

2004

Sci. agric. (Piracicaba, Braz.)

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Primary root growth is very important for wheat (Triticum aestivum L.) crop in upland conditions in the State of São Paulo. Fourteen wheat genotypes (mutant lines and cultivars) were evaluated for primary root growth during 7 and 15 days of development in complete and aerated nutrient solutions, in the laboratory. In the first experiment, solutions with three pH values (4.0, 5.0 and 6.0) at constant temperature (24 ± 1°C), and in the second experiment, solutions with the same pH (4.0) but with three temperatures (18°C ± 1°C, 24°C ± 1°C and 30°C ± 1°C) were used. High genetic variability was observed among the evaluated genotypes in relation to primary root growth in the first stages of development in nutrient solutions independent of pH, temperature and growth period. Genotypes 6 (BH-1146) and 13 (IAC-17), tolerant to Al 3+ showed genetic potential for root growth in the first stages of development (7 and 15 days), regardless of nutrient solution temperature and pH. Genotypes 14 (IAC-24 M), 15 (IAC-24), 17 (MON"S" / ALD "S") × IAC-24 M 2 , 18 (MON"S" / ALD "S") × IAC-24 M 3 and 24 (KAUZ"S" / IAC-24 M 3 ), tolerant to Al 3+ , showed reduced root growth under the same conditions.

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Section: Introductionmentioning

confidence: 99%

Temperature and pH of the nutrient solution on wheat primary root growth

Camargo

Filho

Salomon

2004

Sci. agric. (Piracicaba, Braz.)

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“…In many cases, a point mutation can correct or improve some traits, allowing the selection of superior genetic constitutions in the early generations. This strategy was used to change the frequency of some genes that are negligible by the expression of traits in the IAC-24 wheat cultivar, allowing the selection of at least eight lines that maintained the original characteristics and had traits such as the height of plants and tolerance to pathogens (Tulmann-Neto et al, 1995). In triticale, mutation induction was efficient in reducing the height of plants like those produced by artificial crosses (Pandini et al, 1997).…”

Section: Mutant Studymentioning

confidence: 99%

Rice (Oryza sativa) breeding strategies for grain biofortification

Mingotte¹,

Revolti²,

Trevisoli³

et al. 2018

Afr. J. Biotechnol.

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Biofortification is a process in which plant species are improved in order to raise the nutritional content of the product consumed. The following are some of the main techniques that can be introduced in plant breeding programs in order to improve the nutritional quality of the food to be produced. The rice breeding for higher Fe and Zn content in grain, rice breeding for higher β-carotene content in the grain, rice breeding for higher folate content in the grain, techniques used for plant transformation, transformation via protoplasts, transformation via bioballistics (or biolistic), transformation via Agrobacterium tumefaciens, identification and in vitro selection of transformed tissues, concepts of gene expression and regulation, protein expression, proteomics, mutant study, patch-clamp, were studied. It is necessary to verify the occurrence of variability among the rice genotypes for the Fe, Zn and B complex vitamins; therefore, it will be possible to select these materials within breeding programs. The simple selection of these superior genotypes in relation to nutritional quality, even though by means of conventional breeding techniques, can bring benefits to rice consumption by the human population.

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“…Novos trabalhos coordenados pela Agência Internacional de Energia Atômica, Áustria, foram iniciados em 1985. Nessa época, sementes de algumas cultivares de destaque foram irradiadas visando à melhoria de algumas características agronômicas específicas, dentre elas a tolerância ao alumínio tóxico presente em solos ácidos (TULMANN-NETO et al, 1995;CAMARGO et al, 1997).…”

Section: Introductionunclassified

Avaliação de linhagens de trigo originárias de hibridação com e sem irradiação gama

et al. 2005

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O emprego da técnica de indução de mutação associada à hibridação tem contribuído para a obtenção de novos genótipos de trigo com características agronômicas desejáveis. Avaliaram-se 18 linhagens de trigo, sendo dez oriundas de seleção de plantas do híbrido Kauz "S"x IAC-24 que tiveram as sementes, em geração F2, irradiadas (I) com raios gama e oito não irradiadas (NI), além das cultivares IAC-24 e IAC-289, em seis experimentos instalados no período 1997-99. Foram analisadas a produção de grãos, a resistência a doenças e outras características agronômicas. Em condições de laboratório, estudou-se a tolerância ao alumínio em soluções nutritivas, utilizando-se as cultivares BH-1146 (tolerante) e Anahuac (sensível), como controles. A linhagem L18-I destacou-se quanto à produção de grãos em condição de irrigação por aspersão e solo corrigido, nos três anos considerados. Em solo ácido e condição de sequeiro, L20-I, tolerante à toxicidade de Al3+, em soluções nutritivas, destacou-se quanto à produção de grãos, diferindo somente da IAC-289, a mais sensível à toxicidade de Al3+. IAC-289 e L9-NI destacaram-se na condição de sequeiro e solo corrigido, diferindo somente das linhagens L3-NI e L11-I. Na linhagem L11-I, observou-se porte mais baixo em todos os experimentos associado à resistência ao acamamento e à tolerância à toxicidade de Al3+. Todos os genótipos foram suscetíveis ao agente causal da mancha-da-folha. L9-NI tem potencial como fonte de genes em programas de melhoramento genético dada sua resistência à ferrugem-da-folha. Com exceção de Anahuac, IAC-289 e da L3-NI, todos os genótipos foram tolerantes à presença de 10 mg L-1 de Al3+ em soluções nutritivas.

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Indução de mutação visando a redução de altura de planta e resistência às doenças no cultivar de trigo (Triticum aestivum L.) IAC-17

Cited by 8 publications

References 3 publications

Temperature and pH of the nutrient solution on wheat primary root growth

Temperature and pH of the nutrient solution on wheat primary root growth

Rice (Oryza sativa) breeding strategies for grain biofortification

Avaliação de linhagens de trigo originárias de hibridação com e sem irradiação gama

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