Vulnerability of rice and wheat yields in NW India to future changes in climate

Lal, M.; Singh, K. K.; Rathore, L. S.; Srinivasan, G.; Saseendran, S. A.

doi:10.1016/s0168-1923(97)00064-6

Cited by 183 publications

(121 citation statements)

References 5 publications

Supporting

Mentioning

102

Contrasting

Unclassified

Order By: Relevance

“…Positive deviations for the R4-R9 phase were also simulated for the japonica genotype (EEA 406) and red rice biotypes (Table 5), with the greatest positive deviations of all genotypes and slightly greater values in the asymmetric increasebased temperature scenarios, reaching 10 days in scenario 5b. A longer R4-R9 (grain filling) phase increases the opportunity for grain growth, but at the same time, higher nighttime temperature (especially in asymmetric scenarios) increases canopy respiration, which may affect negatively grain yield, possibly offsetting the positive effect of elevated CO 2 on crop growth and yield (Lal et al, 1998;Streck, 2005;Streck & Alberto, 2006a).…”

Section: Resultsmentioning

confidence: 99%

“…Many studies with different crops, including rice, reported a decrease in the duration of crop developmental phases, under climate change scenarios (Lal et al, 1998;Weiss et al, 2003;Steinmetz et al, 2006;Tao et al, 2008). A few studies, however, reported an increase in the duration of developmental phases, when temperature was increased by 2 up to 6 o C (Streck et al, 2006).…”

Section: Resultsmentioning

confidence: 99%

“…One of such limitations is that most of the studies consider crops are free of insects, diseases and weeds (Lal et al, 1998;Streck et al, 2006), but some studies have demonstrated that plant pests increase in climate change scenarios (Ghini et al, 2008). These results showed that current modern rice genotypes could be less competitive with red rice in simulated future climates.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, when assessing crop development response to climate change scenarios, nonlinear models should be preferred (Streck et al, 2006). Some researches have been devoted to study the effect of climate change on rice development (Lal et al, 1998;Tao et al, 2008). In Brazil, only the study by Steinmetz et al (2006) reports on the effect of climate change on rice development.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Impact of increasing mean air temperature on the development of rice and red rice

Lago

Streck

Alberto

et al. 2008

Pesq. agropec. bras.

View full text Add to dashboard Cite

-The objective of this study was to assess the development response of cultivated rice and red rice to different increases in minimum and maximum daily air temperatures, in Santa Maria, Rio Grande do Sul State, Brazil. One hundred years climate scenarios of temperatures 0, +1, +2, +3, +4, and +5 o C, with symmetric and asymmetric increases in minimum and maximum daily air temperatures were created, using the LARS-WG Weather Generator, and a 1969-2003 database. Nine cultivated rice genotypes (IRGA 421, IRGA 416, IRGA 417, IRGA 420, BRS 7 TAIM, BR-IRGA 409, EPAGRI 109, EEA 406 and a hybrid), and two red rice biotypes (awned black hull-ABHRR, and awned yellow hull-AYHRR) were used. The dates of panicle differentiation (R1), anthesis (R4), and all grains with brown hulls (R9) were estimated with a nonlinear simulation model. Overall, the duration of the emergence-R1 phase decreased, whereas the duration of the R1-R4 and R4-R9 phases most often increased, as temperature increased in the climate change scenarios. The simulated rice development response to elevated temperature was not the same, when the increase in minimum and maximum temperature was symmetric or asymmetric.Index terms: Oryza sativa, global warming, phenology, simulation, weeds. Impacto do aumento na temperatura média do ar sobre o desenvolvimento do arroz e do arroz-vermelhoResumo -O objetivo deste trabalho foi avaliar a resposta do desenvolvimento do arroz cultivado e do arroz vermelho a diferentes aumentos nas temperaturas mínima e máxima diárias do ar, em Santa Maria, RS, Brasil. Foram criados cenários climáticos de cem anos de 0, +1, +2, +3, +4 e +5 o C, com aumentos simétricos e assimétricos nas temperaturas mínima e máxima diária do ar, usando o Weather Generator LARS-WG e uma base de dados de 1969-2003. Foram usados nove genótipos de arroz cultivado (IRGA 421, IRGA 416, IRGA 417, IRGA 420, BRS 7 TAIM, BR-IRGA 409, EPAGRI 109, um híbrido e EEA 406) e dois biótipos de arroz-vermelho (casca preta aristado e casca amarela aristado). A data da diferenciação da panícula (R1), a antese (R4) e todos os grãos com casca marrom (R9) foram estimados com um modelo não linear. Em geral, a duração da fase emergência-R1 diminuiu, enquanto a duração das fases R1-R4 e R4-R9 aumentaram, com o aumento da temperatura nos cenários de mudança climática. A resposta simulada do desenvolvimento do arroz à elevação da temperatura não foi a mesma, quando o aumento na temperatura mínima e máxima foi simétrico ou assimétrico.Termos para indexação: Oryza sativa, aquecimento global, fenologia, simulação, planta daninha.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Impact of increasing mean air temperature on the development of rice and red rice

Lago

Streck

Alberto

et al. 2008

Pesq. agropec. bras.

View full text Add to dashboard Cite

show abstract

“…Diversos trabalhos têm relatado o efeito negativo de temperaturas elevadas sobre a planta de trigo (Cargnin et al, 2006a;Fokar et al, 1998;Khanna-Chopra e Viswanathan, 1999;Lal et al, 1998;Rane e Nagarajan, 2004;Shah e Paulsen, 2003;Souza e Ramalho, 2001;Yang et al, 2002). Segundo Fokar et al (1998), temperatura alta pode ser o maior fator de estresse ambiental limitante da produtividade de trigo, sendo a tolerância ao calor um importante objetivo nos programas de melhoramento.…”

Section: Introductionunclassified

Desempenho de genitores e populações segregantes de trigo sob estresse de calor

et al. 2011

View full text Add to dashboard Cite

A expansão da triticultura para áreas com temperaturas mais elevadas, como o Brasil-Central, constitui-se uma das principais medidas para diminuir a importação de trigo. Assim, genótipos tolerantes ao calor serão de extrema importância para elevar a produtividade desta cultura. Objetivou-se com este trabalho detectar variabilidade genética para tolerância ao calor, identificar populações e genitores mais tolerantes e quantificar o efeito de altas temperaturas sobre estes genótipos de trigo. Foram realizados dois experimentos em Viçosa (MG), utilizando-se o delineamento látice quadrado 16x16 com duas repetições, composto por 240 famílias oriundas de oito populações segregantes mais 16 genitores. No primeiro experimento, semeado em fevereiro de 2007 (verão), foram avaliadas famílias F 2:4 e no segundo, em junho de 2007 (inverno), famílias F 2:5 . Avaliaram-se os caracteres floração, altura de planta, produção de grãos e massa de mil grãos. Diferenças de temperatura da emergência ao florescimento foram determinantes na resposta dos genótipos entre os ambientes. Detectou-se variabilidade genética para tolerância ao calor entre genitores e populações segregantes de trigo. Todos os caracteres avaliados tiveram redução sob altas temperaturas, sendo a produção de grãos o caráter mais afetado, seguido da altura, floração e massa de mil grãos. Os genótipos mais tolerantes ao calor foram os genitores BR 24, Aliança e EP 93541 e as populações segregantes BH1146/BR24// Aliança/EP93541, BR24/Aliança//EP93541/CPAC9662 e Aliança/EP93541// CPAC9662/Pioneiro. Palavras-chave: Triticum aestivum L., altas temperaturas, melhoramento. Performance of wheat genitors and segregating populations under heat stress AbstractThe expansion of wheat crops to areas with higher temperatures, like the Central-Brazil, is one of the main actions to decrease the wheat importation. For this reason, heat tolerant genotypes are essentials. The objective of this study was to identify genetic variability for heat tolerance, to identify heat tolerant wheat populations and genitors, and to quantify the high temperature effects on those wheat genotypes. Two experiments were carried out in Viçosa, Minas Gerais State. A 16x16 square lattice design was used with two replications, where 240 families from eight segregating populations (30 families from each population) plus 16 genitors were evaluated. In the first experiment sowed in February 2007 (summer), F 2:4 families were evaluated. In the second one sowed in June 2007 (winter), F 2:5 families were evaluated. The flowering, plant height, grain yield, and thousand grain weight were evaluated. Different temperature conditions from emergence to flowering were crucial on genotype responses when compared the two environments. There was found genetic variability for heat tolerance between wheat genitors and segregating populations. All the evaluated traits presented reduction under high temperatures, being the grain yield the most affected, followed by plant height, flowering, and thousand grain weight. The genito...

show abstract