Yield Adjustment by Canola Grown at Different Plant Populations under Semiarid Conditions

Angadi, Sangamesh V.; Cutforth, H. W.; McConkey, B.G.; Gan, Yantai

doi:10.2135/cropsci2003.1358

Cited by 174 publications

(186 citation statements)

References 18 publications

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“…Pea populations were consistently above the minimum of 30 plants m (2 required to obtain maximum pea yields in southwestern Saskatchewan (Johnston et al 2002b). Similarly, canola populations were above the threshold of 40 plants m (2 required for good yield potential at Swift Current (Angadi et al 2003). In a few cases, the wheat population was lower than our target of 80Á100 plants m (2 .…”

Section: Plant Densitymentioning

confidence: 62%

Adaptation of alternative pulse and oilseed crops to the semiarid Canadian Prairie: Seed yield and water use efficiency

Angadi¹,

McConkey²,

Cutforth³

et al. 2008

Can. J. Plant Sci.

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. 2008. Adaptation of alternative pulse and oilseed crops to the semiarid Canadian Prairie: Seed yield and water use efficiency. Can. J. Plant Sci. 88: 425Á438. Diversification and intensification of the cropping systems in the traditional wheat-fallow area of the semiarid Canadian prairie is necessary to improve sustainability. Selection of alternate crops to include in cropping systems requires information on production risks with different climate regimes. To understand water use/yield relationships of alternate crops, three pulse crops (leguminous grain crops) [chickpea (Cicer arietinum L.), pea (Pisum sativum L.) and lentil (Lens culinaris Medik.)], three oilseed crops [canola (Brassica napus L. and B. rapa L.) and mustard (B. juncea L.)], and one cereal crop [wheat (Triticum aestivum L.)] were studied under varying water regimes: during 1996Á1998 under well-watered, rainfed, imposed drought conditions, and in 2001 under rainfed conditions. Generally, the relative ranking between crops for water use was maintained across water regimes, such that the crops separated into three general groups of water users (high: wheat, B. napus, mustard; medium: chickpea, B. rapa, lentil; low: pea) with pea using an average of 34 mm and 13 mm less water than high-and medium-water-using crop groups, respectively. The exceptions included desi chickpea, which tended to use less water and B. rapa, which tended to use more water relative to the other crops as water use decreased. Generally, pea and wheat produced the most grain and biomass, had the highest water use efficiency, and had moderately high to high harvest indices. Wheat and pea are well adapted to variable rainfall amounts inherent in semiarid climates. Desi chickpea and lentil produce good grain yields under dry conditions, and grain yields relative to those of other crops can be increased by some drought stress, especially mid-to lateseason stress. Therefore, because of their relatively good performance under water-stressed conditions, they are also well adapted to semiarid climates. Conversely, the Brassica oilseeds yielded relatively poorly compared with wheat and pulse crops under severe water-stressed conditions, so they are not as well adapted to the semiarid climate. In 2001, grain yield of wheat and pulses seeded on stubble was ]30% of the yield on fallow, whereas stubble-seeded Brassica oilseeds yielded only about 10% of that on fallow. Compared with stubble seeding, production of Brassica oilseeds on fallow will decrease the risk of very low yields under drought. We found little indication that mustard was more drought tolerant than B. napus.

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Section: Plant Densitymentioning

confidence: 62%

Adaptation of alternative pulse and oilseed crops to the semiarid Canadian Prairie: Seed yield and water use efficiency

Angadi¹,

McConkey²,

Cutforth³

et al. 2008

Can. J. Plant Sci.

Self Cite

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“…Moreover, the findings of Gan et al (2004) are based on total seed yield and should be interpreted carefully. If compensation mechanisms are active (Figure 4; Angadi et al, 2003), total seed yield might not be the best measure to determine a developmental sensitivity window.…”

Section: Identification Of a Developmental Sensitivity Windowmentioning

confidence: 99%

“…Studies that quantify the heat stress response by total seed or fruit yield will have less power to identify effects that are only present in a small developmental window. Compensation mechanisms of plants (Figure 4; Angadi et al, 2003;Young et al, 2004) make total seed or fruit yield as a measure even less reliable. Our findings should increase awareness of the fact that the regulation of a trait of interest can change during development.…”

Section: Gwa Mapping Reveals Stage-specific Qtlsmentioning

confidence: 99%

Genome-Wide Association Mapping of Fertility Reduction upon Heat Stress Reveals Developmental Stage-Specific QTLs in Arabidopsis thaliana

et al. 2015

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ORCID ID: 0000-0001-8918-0711 (J.J.B.K.)For crops that are grown for their fruits or seeds, elevated temperatures that occur during flowering and seed or fruit set have a stronger effect on yield than high temperatures during the vegetative stage. Even short-term exposure to heat can have a large impact on yield. In this study, we used Arabidopsis thaliana to study the effect of short-term heat exposure on flower and seed development. The impact of a single hot day (35°C) was determined in more than 250 natural accessions by measuring the lengths of the siliques along the main inflorescence. Two sensitive developmental stages were identified, one before anthesis, during male and female meiosis, and one after anthesis, during fertilization and early embryo development. In addition, we observed a correlation between flowering time and heat tolerance. Genome-wide association mapping revealed four quantitative trait loci (QTLs) strongly associated with the heat response. These QTLs were developmental stage specific, as different QTLs were detected before and after anthesis. For a number of QTLs, T-DNA insertion knockout lines could validate assigned candidate genes. Our findings show that the regulation of complex traits can be highly dependent on the developmental timing.

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“…Decrease in the number of pods under stress conditions may result from plant inability to create lateral branches because of salt stress intensity and its weakness, which could finally result in decreasing number and size of formed pods. The yield of canola depends on density, number of pods per plant, number of seeds per pod and mass of the seeds (Angadi et al, 2003). Diepenbrock (2000) reported that in rapeseed the number of pods on plant is the most important part of its yield component.…”

Section: And Discussionmentioning

confidence: 99%

Effect of laser priming on canola yield and its components under salt stress

Mohammadi

Shekari²,

Fotovat³

et al. 2012

International Agrophysics

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A b s t r a c t. The effect of laser priming at different irradiation times on canola yield and its components under saline conditions were investigated. The results showed that laser priming had a positive effect on yield and its components and caused yield increase under saline conditions. Increase in salt levels had a negative and significant effect on seed yield, number of seeds per pod, number of pod per plant, pod length and plant height. The results showed that 45-min laser priming had the strongest effect on yield and yield components and reduced significantly the adverse effects of salinity. By contrast, laser radiation applied for 60 and 75 min, resulted in a dramatic decrease in yield and its components. Correlation coefficients between the attributes showed that canola yield had a positive and significant correlation with plant height, number of seeds, pod per main branch and lateral branches, length of pod and number of lateral branches. Effects of laser and salinity were significant on lateral branch pod length but not on main branch pods.K e y w o r d s: canola, laser irradiation, salt stress, yield, yield components INTRODUCTIONSalinity is known to adversely affect productivity of most crops worldwide (Ashraf, 2009) because their biomass and seed yield are significantly suppressed by this abiotic stress (Munns and Tester, 2008). Globally, more than 770 000 km 2 of lands are salt-affected by secondary salinization: 20% of irrigated land and about 2% of dry land agricultural land (Yildirim et al., 2006). In Asia, after pervious USSR, China, India and Pakistan the largest amount of saline soils belong to Iran (Szabolc, 1989). Canola represents its highest yield in proper and desirable soil conditions. However its growth, yield and oil yield can be reduced significantly by environmental stresses such as drought, salinity, water logging etc. Therefore, canola yield may reduce under saline soils (Ashraf and Mc Neilly, 2004).Among the various methods of priming it seems that there is little information about physical methods. But in recent years, interest in the use of physical methods of plant growing stimulation has increased (Carbonell et al., 2000;Dinoev, 2006;Hernandez et al., 2010; Vasilevski, 2003). Also in recent years the use of laser radiation in biology and agriculture extended widely and rapidly. Hernandez et al. (2006) reported that laser radiation increased the emergence speed and percentage, dry mass of seedlings and, ultimately, significantly increased the yield of laser radiated seeds. In the case of physical treatment the energy introduced in the cell creates conditions for molecular transformations and, as a result, the necessary substances are provided for the cell (Aladjadjiyan, 2007).The purpose of this experiment was to study different laser intensities for priming canola seeds as well as to measure how different densities of laser radiation affect canola yield and performance under salt stress conditions. MATERIALS AND METHODSThe experiment was conducted as factorial in the compl...

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Yield Adjustment by Canola Grown at Different Plant Populations under Semiarid Conditions

Cited by 174 publications

References 18 publications

Adaptation of alternative pulse and oilseed crops to the semiarid Canadian Prairie: Seed yield and water use efficiency

Adaptation of alternative pulse and oilseed crops to the semiarid Canadian Prairie: Seed yield and water use efficiency

Genome-Wide Association Mapping of Fertility Reduction upon Heat Stress Reveals Developmental Stage-Specific QTLs in Arabidopsis thaliana

Effect of laser priming on canola yield and its components under salt stress

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