Improved phosphorus efficiency of three new wheat genotypes from CIMMYT in comparison with an older Mexican variety

Egle, Komi; Manske, Günther; Römer, Wilhelm; Vlek, Paul L. G.

doi:10.1002/(sici)1522-2624(199906)162:3<353::aid-jpln353>3.0.co;2-a

Cited by 29 publications

(26 citation statements)

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“…For example, Hetrick et al [33] detected that wheat varieties developed before 1950 were more reliant on mycorrhizal symbiosis than modern ones. Similarly, landraces of mycorrhizal wheat grown in low-P soils produced a higher yield than modern varieties grown under the same conditions [34].…”

Section: Nutrient-use Efficiencymentioning

confidence: 93%

The need to breed crop varieties suitable for organic farming, using wheat, tomato and broccoli as examples: A review

Bueren

Jones

Tamm

et al. 2011

NJAS: Wageningen Journal of Life Sciences

323

209

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a b s t r a c tIt is estimated that more than 95% of organic production is based on crop varieties that were bred for the conventional high-input sector. Recent studies have shown that such varieties lack important traits required under organic and low-input production conditions. This is primarily due to selection in conventional breeding programmes being carried out in the background of high inorganic fertilizer and crop protection inputs. Also, some of the traits (e.g., semi-dwarf genes) that were introduced to address problems like lodging in cereals in high-input systems were shown to have negative side-effects (reduced resistance to diseases such as Septoria, lower protein content and poorer nutrient-use efficiency) on the performance of varieties under organic and low-input agronomic conditions. This review paper, using wheat, tomato and broccoli as examples, describes (1) the main traits required under low-input conditions, (2) current breeding programmes for organic, low-input agriculture, (3) currently available breeding and/or selection approaches, and (4) the benefits and potential negative side-effects of different breeding methodologies and their relative acceptability under organic farming principles.

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Section: Nutrient-use Efficiencymentioning

confidence: 93%

The need to breed crop varieties suitable for organic farming, using wheat, tomato and broccoli as examples: A review

Bueren

Jones

Tamm

et al. 2011

NJAS: Wageningen Journal of Life Sciences

323

209

View full text Add to dashboard Cite

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“…P is found to be abundant in fruits and seeds of cucumber plants (Papadopoulos, 1994). It is widely found that increasing P as a fertilizer will promote reproductive yields (Egle et al, 1999) and inflorescence production (Besmer and Koide, 1999), particularly when P is limiting in natural systems (Feller, 1995). Conversely, limitation of P supply has been shown to decrease the production of floral structures (Arnon and Hoagland, 1943;Shamsi and Whitehead, 1977;Ma et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Effect of NP and foliar spray on growth and chemical compositions of some medicinal Apiaceae plants grow in arid regions in Egypt

Khalid¹

2012

J. Soil Sci. Plant Nutr.

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Arid regions in Egypt are characterized by poor nutrients such as macro and microelements and unfavorable environmental conditions which negatively affect growth and productivity of medicinal and aromatic plants including anise (Pimpinella anisum L.), coriander (Coriandrum sativum L.) and sweet fennel (Foeniculum vulgare var. Dolce) plants. Thus, the main objective of the present investigation was to study the effect of different levels of NP fertilizers, trace elements and their interactions on the morphological and biochemical contents of these three plants under arid regions conditions. The effects of NP and trace elements on the growth (height, leaf number, branch number, umbel number, fresh weight, dry weight and fruit yield per plant) was measured and quantitative analysis of essential oils, fixed oil, total carbohydrates, soluble sugars and nutrient content of anise, coriander and sweet fennel were performed. The most effective rate was N3P3 x trace elements interaction, resulting in a positive increase in vegetative growth characters. The highest values of vegetative growth characters were 53.4, 45.9, 10.3, 33.5, 36.8, 11.8 and 7.9, respectively for anise; 83.0, 69.3, 9.8, 29.0, 34.0, 17.5 and 14.4, respectively for coriander; 89.8, 32.6, 7.8, 22.9, 257.8, 99.1 and 27.8, respectively for sweet fennel. As well as N3P3 x trace elements led to higher biochemical contents than the control. The increases were 0.9, 0.3 and 0.9% in essential oil; 5.4, 4.4 and 3.7% in fixed oil, 9, 7.9 and 8.2% in total carbohydrates; 2.4, 2.8 and 1.6% in soluble sugars; 5.0, 7.5 and 14.4% in crude protein; 0.8, 2.0 and 2.3% in nitrogen; 1.5, 0.6 and 0.4% in phosphorous; 1.3, 1.2 and 1.7% in potassium for anise, coriander and sweet fennel, respectively.

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“…Bars represent standard errors of means (n = 5; adapted from Wissuwa and Ae 2001; a more detailed description of genotypes used is provided in that paper) wheat cultivars (Hetrick et al 1992(Hetrick et al , 1993. Furthermore, landraces of mycorrhizal wheat grown in low-P soils produced a higher yield than modern varieties grown under the same conditions (Egle et al 1989). This is in agreement with Zhu et al (2001) who found that mycorrhizal responsiveness of modern wheat cultivars, measured in terms of shoot P, was generally lower than that of older cultivars.…”

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confidence: 99%

Novel approaches in plant breeding for rhizosphere-related traits

2008

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Selection of modern varieties has typically been performed in standardized, high fertility systems with a primary focus on yield. This could have contributed to the loss of plant genes associated with efficient nutrient acquisition strategies and adaptation to soil-related biotic and abiotic stresses if such adaptive strategies incurred a cost to the plant that compromised yield. Furthermore, beneficial interactions between plants and associated soil organisms may have been made obsolete by the provision of nutrients in high quantity and in readily plant available forms. A review of evidence from studies comparing older traditional varieties to modern high yielding varieties indeed showed that this has been the case. Given the necessity to use scarce and increasingly costly fertilizer inputs more efficiently while also raising productivity on poorer soils, it will be crucial to reintroduce desirable rhizosphere-related traits into elite cultivars. Traits that offer possibilities for improving nutrient acquisition capacity, plantmicrobe interactions and tolerance to abiotic and biotic soil stresses in modern varieties were reviewed. Despite the considerable effort devoted to the identification of suitable donors and of genetic factors associated with these beneficial traits, progress in developing improved varieties has been slow and has so far largely been confined to modifications of traditional breeding procedures. Modern molecular tools have only very recently started to play a rather small role. The few successful cases reviewed in this paper have shown that novel breeding approaches using molecular tools do work in principle. When successful, they involved close collaboration between breeders and scientists conducting basic research, and confirmation of phenotypes in field tests as a 'reality check'. We concluded that for novel molecular approaches to make a significant contribution to breeding for rhizosphere related traits it will be essential to narrow the gap between basic sciences and applied breeding through more interdisciplinary research that addresses rather than avoids the complexity of plant-soil interactions.

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Improved phosphorus efficiency of three new wheat genotypes from CIMMYT in comparison with an older Mexican variety

Cited by 29 publications

References 0 publications

The need to breed crop varieties suitable for organic farming, using wheat, tomato and broccoli as examples: A review

The need to breed crop varieties suitable for organic farming, using wheat, tomato and broccoli as examples: A review

Effect of NP and foliar spray on growth and chemical compositions of some medicinal Apiaceae plants grow in arid regions in Egypt

Novel approaches in plant breeding for rhizosphere-related traits

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