resposta de cultivares de feijão à alta temperatura do ar no período reprodutivo response of beans cultivars to high air temperature in the reproductive period
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ID: 248540
2007
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Abstract
O rendimento de grãos do feijão é afetado pela ocorrência de alta temperatura do ar, durante o período reprodutivo. Sendo assim, foi objetivo do trabalho avaliar a variabilidade genética do feijão para tolerância à alta temperatura do ar durante o período de pré-floração (R5) à formação de vagens (R7). O experimento foi conduzido em câmara de crescimento (fitotron), com controle de temperatura, luz, fotoperíodo e demais condições ótimas de cultivo. Durante o subperíodo R5-R7, as plantas foram submetidas à temperatura de 30°C, durante uma hora, diariamente. O delineamento experimental utilizado foi o inteiramente casualizado, com três repetições, e avaliaram-se 20 cultivares de feijão. Comportamento diferenciado foi observado para as características fenológicas, reprodutivas e dos componentes da produção, indicando variabilidade genética para tolerância à alta temperatura do ar durante o subperíodo R5-R7. As cultivares de feijão "Pérola", "TPS Bonito", "BRS Valente" e "Corrente" são tolerantes à temperatura do ar de 30°C por uma hora, durante o período reprodutivo.
Common bean grain yield is affected by high air temperature during the reproductive period. This study was aimed at evaluating common bean genetic variability for tolerance to high air temperature during the pre-flowering (R5) and pod formation (R7) period. The experiment was conducted in a phytotron, with controlled air temperature, light and photoperiod and other conditions for optimum growth. During the R5-R7 period, plants were exposed to 30°C air temperature during one hour a day. The experimental design used was a completely randomized with three replications and 20 common bean cultivars. Differences in phenological and reproductive traits and yield components, indicated genetic variability for tolerance to high air temperature during the R5-R7 period. Cultivars ‘Pérola’, ‘TPS Bonito’, ‘BRS Valente’ and ‘Corrente’ were tolerant to air temperature of 30°C during one hour a day during the reproductive period.
Common bean grain yield is affected by high air temperature during the reproductive period. This study was aimed at evaluating common bean genetic variability for tolerance to high air temperature during the pre-flowering (R5) and pod formation (R7) period. The experiment was conducted in a phytotron, with controlled air temperature, light and photoperiod and other conditions for optimum growth. During the R5-R7 period, plants were exposed to 30°C air temperature during one hour a day. The experimental design used was a completely randomized with three replications and 20 common bean cultivars. Differences in phenological and reproductive traits and yield components, indicated genetic variability for tolerance to high air temperature during the R5-R7 period. Cultivars ‘Pérola’, ‘TPS Bonito’, ‘BRS Valente’ and ‘Corrente’ were tolerant to air temperature of 30°C during one hour a day during the reproductive period.
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jnior2007cinciaresposta
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| Authors | ;Leo Hoffmann Júnior;Nerinéia Dalfollo Ribeiro;Simone Saydelles da Rosa;Evandro Jost;Nerison Luis Poersch;Sandro Luís Petter Medeiros |
| Journal | Trials |
| Year | 2007 |
| DOI |
10.1590/S0103-84782007000600006
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