دورية أكاديمية

AGRONOMIC EVALUATION OF GENETICALLY MODIFIED SOYBEAN GENOTYPES IN RESPONSE TO WATER DEFICIT.

التفاصيل البيبلوغرافية
العنوان: AGRONOMIC EVALUATION OF GENETICALLY MODIFIED SOYBEAN GENOTYPES IN RESPONSE TO WATER DEFICIT.
Alternate Title: AVALIAÇÕES AGRONÔMICAS DE SOJA GENETICAMENTE MODIFICADA EM RESPOSTA AO DÉFICIT HÍDRICO. (Portuguese)
المؤلفون: Santos de Lima, Luís Fernando, Ferreira, Leonardo Cesar, Fuganti-Pagliarini, Renata, Rockenbach Marin, Silvana Regina, de Oliveira, Maria Cristina Neves, Mertz-Henning, Liliane Marcia, Farias, José Renato Bouças, Neumaier, Norman, Nakashima, Kazuo, Nunes, Liliane Moreira, Nepomuceno, Alexandre Lima
المصدر: Global Science & Technology; jan-abr2018, Vol. 11 Issue 1, p77-88, 12p
مصطلحات موضوعية: SOYBEAN, PLANT genetics, GENOTYPE-environment interaction, PLANT-water relationships, SOIL moisture, EFFECT of stress on plants
Abstract (English): Due to the importance of the soybean complex on the world economy, there is concern about the significant losses of the full production potential due to abiotic stresses, so that drought is the main challenge for production. Genetic engineering allows insertion of specific genes in order to develop more drought tolerant cultivars. This study aimed at evaluating field agronomic responses of conventional soybean cultivars (BR 16 and Embrapa 48) under water deficit conditions, in comparison to the soybean lines 1Ab58 and 1Bb2193, genetically modified (GM) for drought tolerance with rd29A:AtDREB1A and rd29A:AtDREB2A constructions. The conventional cultivar Embrapa 48 was the genotype most benefited by the abundance of water (IRR), but with no differences in yield compared to other plant materials under such conditions. Although the crossing 09D-0077 (BR 16 x 1Ab58) presented the highest leaf area index (LAI) values under IRR, such a genotype had a similar performance to GM lines (1Ab58 and 1Bb2193), including in yield, thus indicating that backcrossing and transforming elite lines showed similar responses to water deficit. Further studies are needed in order to confirm the potential of GM lines and the crossing 09D- 0077 to cope with drought under more severe water deficit conditions. [ABSTRACT FROM AUTHOR]
Abstract (Portuguese): Devido à importância do complexo soja na economia mundial, existe a preocupação com as perdas significativas do máximo potencial produtivo em decorrência de estresses abióticos, sendo a seca o principal desafio para a produção. A engenharia genética permite a inserção de genes específicos a fim de desenvolver cultivares mais tolerantes à seca. O objetivo deste estudo foi analisar a resposta em campo de cultivares convencionais de soja (BR 16 e Embrapa 48) sob condições de déficit hídrico, em comparação às linhagens de soja 1Ab58 e 1Bb2193, geneticamente modificadas (GMs) para tolerância à seca com as construções rd29A:AtDREB1A e rd29A:AtDREB2A. A cultivar convencional Embrapa 48 foi o genótipo mais beneficiado pela abundância de água (IRR), mas sem diferenças no rendimento em comparação aos outros materiais vegetais sob tais condições. Embora o cruzamento 09D-0077 (BR 16 x 1Ab58) tenha apresentado o maior índice de área foliar (LAI) sob IRR, tal genótipo apresentou desempenho similar ao das linhagens GMs (1Ab58 and 1Bb2193), inclusive quanto ao rendimento, indicando que o retrocruzamento e a transformação para obtenção de eventos elite mostraram respostas semelhantes ao déficit hídrico. Estudos adicionais são necessários a fim de confirmar o potencial de linhagens GM e do cruzamento 09D-0077 para lidar com a seca sob condições mais severas de déficit hídrico. [ABSTRACT FROM AUTHOR]
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قاعدة البيانات: Complementary Index