Growth, development and light interception of old and modern wheat cultivars in a Mediterranean-type environment

Siddique, Kadambot H. M.; Belford, R. K.; Perry, M. W.; Tennant, D.

doi:10.1071/ar9890473

Cited by 133 publications

(157 citation statements)

References 14 publications

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“…The results are in accordance with various studies which have revealed the positive impact of increased number of spikes per area on yield [18][19][20][21] and the number of grains per spike [18,22,23]. On the contrary, our results did not confirm studies claiming that higher yields are combined with increased 1000 kernel weight [5,24].…”

Section: Discussioncontrasting

confidence: 46%

Multienvironmental evaluation of wheat landraces by GGE Biplot Analysis for organic breeding

Koutis¹,

Mavromatis²,

Baxevanos³

et al. 2012

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This study was conducted to determine the performance of wheat landraces cultivated under organic conditions and to analyze their stability across diverse environments. Six wheat landraces with specific characteristics (high protein content, drought tolerance, stay green) were tested under organic growing environment. The experiments were applied in three locations (Larisa (LAR), Thessaloniki (THES), Kilkis (KIL)) for three growing seasons. The role of specific agronomic traits (stay green, lodging) and their correlation with yield components were analyzed. Stability and genotypic superiority for grain yield were determined using ANOVA and genotype × environment (GGE) biplot analysis. Furthermore, the interrelationships among wheat traits and genotype-by-trait using regression analysis, coefficient of variation and (GT)-biplot technique were studied. Significant differences were found in yield among wheat landraces tested, and also in yield components, as related to specific traits expressed into organic environment. Best varieties in terms of yield were Skliropetra and M. Argolidas, characterized by lowest weight of 1000 grains, large number of spikes per m 2 meter and the highest number of grains per spike as compared to the other landraces. The statistical model GGE biplot provides useful information for experimentation of wheat landraces when grown under organic environment. It identifies clearly the ideal and representative environment for experimentation and underlines the effect of specific traits for each wheat cultivar on yield performance and stability across environments.

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Section: Discussioncontrasting

confidence: 46%

Multienvironmental evaluation of wheat landraces by GGE Biplot Analysis for organic breeding

Koutis¹,

Mavromatis²,

Baxevanos³

et al. 2012

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show abstract

“…During the last 20-25 years, interest in identifying and evaluating root system traits that adapt wheat to water-limited environments has increased. Potential traits include increasing root distribution at depth to improve deep water capture (O'Brien 1979;Manske and Vlek 2002), depth of rooting to extract water from full soil depth (Hurd 1974), fast root elongation rates for deep water capture (O'Brien 1979), reducing the diameter of the xylem vessel in the seminal roots to conserve soil water (Richards and Passioura 1989), angle of seminal roots for extracting water from full soil depth (Nakamoto and Oyanagi 1994;Manschadi et al 2006) and improve the root : shoot dry matter for improve water capture across the soil profile (Siddique et al 1990;Reynolds et al 2007) (Table 1).…”

Section: Lessons From Individual Root Traits For Water Capturementioning

confidence: 99%

Large root systems: are they useful in adapting wheat to dry environments?

Palta

Chen

Milroy

et al. 2011

Functional Plant Biol.

254

187

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Abstract. There is little consensus on whether having a large root system is the best strategy in adapting wheat (Triticum aestivum L.) to water-limited environments. We explore the reasons for the lack of consensus and aim to answer the question of whether a large root system is useful in adapting wheat to dry environments. We used unpublished data from glasshouse and field experiments examining the relationship between root system size and their functional implication for water capture. Individual root traits for water uptake do not describe a root system as being large or small. However, the recent invigoration of the root system in wheat by indirect selection for increased leaf vigour has enlarged the root system through increases in root biomass and length and root length density. This large root system contributes to increasing the capture of water and nitrogen early in the season, and facilitates the capture of additional water for grain filling. The usefulness of a vigorous root system in increasing wheat yields under water-limited conditions maybe greater in environments where crops rely largely on seasonal rainfall, such as the Mediterranean-type environments. In environments where crops are reliant on stored soil water, a vigorous root system increases the risk of depleting soil water before completion of grain filling.Additional keywords: root biomass, root length, root length density, root system size, water capture.

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“…Although plant form has changed, total biomass has not greatly altered and improved yields are associated with a greater harvest index (Evans & Dunstone, 1970;Rhan & Tsunoda, 1970;Austin et al, 1984;Perry & D'Antuono, 1989;Siddique et al, 1989). In a study of 6 cultivars and 120 progeny of wheat, Rawson et al (1983) found no relation between the peak photosynthetic rate of leaves in different positions on the culm (third and flag leaf blades) and no correlation between photosynthetic rate and yield.…”

Section: Genetic Variation In Net Co^ Exchangementioning

confidence: 99%

Tansley Review No. 27 The control of carbon partitioning in plants

1990

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Summary This review reports on the processes associated with carbon transfer and metabolism in leaves and growing organs and the role of long‐distance transport and vascular links in the regulation of carbon partitioning in plants. Partitioning is clearly influenced by both the supply and demand for photosynthate and is moderated by vascular connections and the storage capacity of the leaves and pathway tissues. However there appears to be little more than circumstantial evidence either that short distance transfer of carbon within either the source or the sink, or that long‐distance transport in the phloem, are limiting photosynthesis or growth directly. Although individual biochemical and physiological processes relating to photosynthesis and growth may be well understood, the factors primarily responsible for the control of carbon partitioning in plants have not been clearly identified. There is a need for a greater understanding of organ initiation and development (source and sink formation and potential size), the clear identification of whether growth is sink or source limited (including possible sink‐controlled photosynthesis) and a detailed assessment of the role of storage in buffering developmental and environmental changes in sink and source activity. Also more information is needed on the role of hormonal and nutritional factors in regulating source and sink activity (organ interactions not directly associated with carbon transfer).

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Growth, development and light interception of old and modern wheat cultivars in a Mediterranean-type environment

Cited by 133 publications

References 14 publications

Multienvironmental evaluation of wheat landraces by GGE Biplot Analysis for organic breeding

Multienvironmental evaluation of wheat landraces by GGE Biplot Analysis for organic breeding

Large root systems: are they useful in adapting wheat to dry environments?

Tansley Review No. 27 The control of carbon partitioning in plants

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