Genetic diversity of transpiration efficiency in sorghum

Xin, Zhanguo; Aiken, Robert M.; Burke, John J.

doi:10.1016/j.fcr.2008.10.010

Cited by 76 publications

(113 citation statements)

References 32 publications

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“…Differences in TE have been reported in sorghum, although generally under well-watered conditions (Hammer et al, 1997;Xin et al, 2009). Other reports also show the existence of genotypic variation in TE under differing water regimes (Donatelli et al, 1992;Balota et al, 2008) in a work that included Tx7078, a genotype with low TE and assumed to be tolerant to pre-flowering drought (Tuinstra et al, 1998).…”

Section: Te Differences In R16 Background Onlymentioning

confidence: 99%

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Stay-green quantitative trait loci's effects on water extraction, transpiration efficiency and seed yield depend on recipient parent background

Vadez

Deshpande

Kholová

et al. 2011

Functional Plant Biol.

118

110

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Abstract. A stay-green phenotype enhances the adaptation of sorghum to terminal drought conditions, although the underlying physiological mechanisms leading to the expression of stay-green remain unclear. Differences in tillering and leaf area at anthesis, transpiration efficiency (TE), water extraction, harvest index (HI) and yield under both terminal drought and fully-irrigated conditions were assessed in 29 introgression lines (IL) developed targeting stay-green QTLs Stg1, Stg2, Stg3, Stg4, StgA, and StgB in S35 background, and 16 IL developed targeting Stg1, Stg3, Stg4, and StgB in R16

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Section: Te Differences In R16 Background Onlymentioning

confidence: 99%

“…Van Oosterom and colleagues (2006) have also hypothesized that stay-green could be the consequence of water saving from having higher water use efficiency. Differences in transpiration efficiency (TE) have been reported under fullyirrigated conditions in sorghum germplasm (Hammer et al, 1997;Xin et al, 2009). …”

mentioning

confidence: 99%

Stay-green quantitative trait loci's effects on water extraction, transpiration efficiency and seed yield depend on recipient parent background

Vadez

Deshpande

Kholová

et al. 2011

Functional Plant Biol.

118

110

View full text Add to dashboard Cite

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“…Condon et al (1990) reported a significant (P<0.01) positive correlation between TE in well watered and drought stressed conditions. Although significant G×E interactions for TE have been observed in both sorghum (Xin et al, 2009;Vadez et al, 2011b) and peanut (Krishnamurthy et al, 2007), the G×E effect was smaller than the genotypic main effect in each of these studies. All available evidence thus suggests that G×E interactions for TE are likely to be minor relative to the genotypic main effects.…”

Section: Discussionmentioning

confidence: 90%

“…However, the potential role of TE is not yet clear. Significant genotypic differences in TE have been reported for C4 species like sorghum Henderson et al, 1998;Mortlock and Hammer, 1999;Xin et al, 2009). Evidence that changes in stomatal conductance have resulted in increased TE as the crop adapted to drought stress is available for wheat, rice (Fisher et al,1998;Jiang et al, 2003, Wang et al, 2005Horie et al, 2006) and pearl millet (Kholová et al, 2010b).…”

Section: Introductionmentioning

confidence: 99%

The physiological basis of genetic improvement in maize (Zea mays L.) yield in the US Corn Belt

Ponce¹

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Maize, along with rice and wheat, provides the foundation of human food supply. Ecological intensification of maize cropping systems and accelerated genetic improvement of maize yield will be necessary to satisfy an increasing demand from rapid population growth (Cassman 1999).Understanding of the physiological basis underpinning genetic improvement of maize can inform breeding efforts and improve tailoring of maize hybrids to intensified cropping systems.Maize yields in the US Corn Belt have increased at a rate of 1% a year for over 70+ years. A series of field studies using the so-called ERA hybrid set (Duvick et al. 2004a), which represent commercially successful hybrid releases over that period, demonstrated that yield improvement resulted from the interaction between genotype and plant population, and documented that yield advance was associated with increased leaf angle score and stay-green score, and decreases in anthesis-silking interval (ASI), tassel size scores, and barrenness. Changes in leaf angle scores and stay green scores have been implicated as determinants of increased radiation use efficiency and water capture (Hammer et al. 2009a;). Increased kernel number per unit area via reduced barrenness, shorter ASI, and reduced tassel size suggest that biomass allocation to the ear may have changed as the result of selection for yield in the ERA hybrids (Duvick et al. 2004a;Hammer et al. 2009a). Increased total biomass and increased partitioning to the kernels around silking and during early ear growth have been implicated as the major physiological determinants of the yield increase in short-season maize (Tollenaar et al. 2006a).We have a cursory understanding of the physiological drivers of yield improvement in temperate maize. This study provides empirical evidence to evaluate previously proposed hypotheses (i.e., water capture; Hammer et al. (2009a)) and deductions from field observations. This study utilizes a crop growth and development framework structured on concepts of resource capture, utilization efficiency and allocation to guide field experimentation. The experimental component of this study includes field experiments in managed stress environments located in USA and Chile during the growing seasons 2012 and 2011/2012 respectively, seeking to quantify genotypic differences in light and water capture, crop and ear growth, and resource allocation. Two seasons of experiments in 2012 utilizing the lysimeter and root chamber facilities located at UQ have been used to quantify genotypic differences in transpiration dynamics and efficiency, biomass allocation, and sensitivities to drought stress. Experimental work used a contrasting subset of single crosses from the ERA hybrids with seed available in Australia. All the experiments were planted at the highest plant density used in each location and platform.ii Measurement of soil water during two years of field experiments showed that total water capture under water-limited conditions did not differ between hybrids from another subset of t...

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“…Unlike other Gramineae crops, sorghum is of economic importance because of not only its tolerance to water deficit but also the possibility to cultivate it in unirrigated production systems and at times when rainfall distribution is irregular (XIN et al, 2009). …”

Section: Introductionmentioning

confidence: 99%

Determination of soil water tension for irrigation management of sweet sorghum

Silva

Aspiazú

Portugal

et al. 2016

SCA

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Culturing of sweet sorghum is being considered as an excellent option for ethanol production, from an agronomical and industrial point of view. At present, information regarding the best soil water tension for beginning sweet sorghum irrigation is not available; hence, this study aimed to determine the adequate soil water tension under field conditions for beginning irrigation of four cultivars of sorghum. Two experiments were conducted at Nova Porteirinha, MG, in a randomized block design with subsubdivided plots having four replications. Each experiment comprised six treatments of soil water tension (plots)-20, 40, 60, 80, 100, and 120 kPa-for resuming sweet sorghum irrigation, and four sweet sorghum cultivars (subplots)-BRS 508, BRS 509, BRS 511, and CMSXS647. After planting, the soil water level in the plots was elevated to field capacity (10 kPa), and then the treatments were applied. During treatment application, irrigation was resumed when the soil water tension reached the limit established in order to elevate the soil water tension to 10 kPa. The amount of water replaced during each irrigation was determined by generating a soil water retention curve for the experimental area. The following parameters were evaluated: green mass production, juice volume, soluble solids (Brix), and tons of Brix per hectare (TBH). The different soil water tensions and cultivars, agricultural year, and interaction between tension and year significantly affected (p ≤ 0.05) the characteristics evaluated, according to the F test. The agronomical characteristics of the evaluated cultivars showed linear relationship with water supply in the soil. According to TBH, irrigation of sweet sorghum needs to be performed when the soil tension reaches 20 kPa. The TBH values did not differ significantly among the four cultivars at the 5% significance level according to Tukey test. ResumoA cultura do sorgo sacarino vem sendo considerada uma ótima opção, sob os pontos de vista agronômico e industrial, para a produção de etanol. Como não há informações sobre a melhor tensão da água do solo para o início da irrigação do sorgo sacarino, objetivou-se determinar em campo a tensão de água do solo adequada para o início da irrigação de quatro cultivares. Foram conduzidos dois experimentos, em Nova Porteirinha, MG, no delineamento em blocos casualizados, no esquema de parcelas subsubdivididas, em quatro repetições. Cada um dos experimentos foi constituído por seis tratamentos de tensão da água do solo (parcelas); 20, 40, 60, 80, 100 e 120 kPa, para o reinício da irrigação do sorgo sacarino, e de quatro cultivares de sorgo sacarino (subparcelas): BRS 508, BRS 509, BRS 511 e CMSXS647. Após o plantio, as parcelas tiveram a umidade do solo elevada à capacidade de campo (10 kPa), quando a partir de então foram aplicados os tratamentos. Durante o período de aplicação dos tratamentos, sempre que a tensão de água no solo atingia o limite de tensão estabelecido, o sistema de irrigação do tratamento era acionado, funcionando o tempo necessário para ...

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Genetic diversity of transpiration efficiency in sorghum

Cited by 76 publications

References 32 publications

Stay-green quantitative trait loci's effects on water extraction, transpiration efficiency and seed yield depend on recipient parent background

Stay-green quantitative trait loci's effects on water extraction, transpiration efficiency and seed yield depend on recipient parent background

The physiological basis of genetic improvement in maize (Zea mays L.) yield in the US Corn Belt

Determination of soil water tension for irrigation management of sweet sorghum

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