Effect of planting density on lodging-related morphology, lodging rate, and yield of tartary buckwheat (<i>Fagopyrum tataricum</i>)

Xiang, Da Bing; Zhao, Gang; Wan, Yan; Tan, M.; Song, Chao; Song, Yue

doi:10.1080/1343943x.2016.1188320

Cited by 42 publications

(33 citation statements)

References 15 publications

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“…Therefore, a decline in PAR in the lower canopy may result in less accumulation of dry matter in the basal internode, decreasing the thickness of the mechanical tissue in the stalk ( Kaack et al, 2003 ; Yao et al, 2013 ), which may lead to a decrease in stem bending and crushing strength of basal internode three at high plant density. Our results are similar to those of previous research, which showed that there was a significant decrease in the stalk crushing strength, mechanical tissue thickness and internode diameter whereas the length of the basal internode and lodging rate increased ( Gou et al, 2007 ; Feng et al, 2014 ; Xiang et al, 2016 ). Our results are inconsistent with those of Kuai et al (2015 , 2016 ) which states that lodging resistance increased with high plant density.…”

Section: Discussionsupporting

confidence: 92%

“…This caused an increase in the internode length and decrease in the internode diameter, leading them to become slimmer and making them more prone to lodging ( Song et al, 2016 ). Our results are similar to those of Xiang et al (2016) , who showed that as plant density in wheat increased, the length of the first internode also increased. The response seen in JQ119 was more with respect to lamina length and width for all phytomers as compared with ZD958 and LP206.…”

Section: Discussionsupporting

confidence: 92%

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Characterization of the Effect of Increased Plant Density on Canopy Morphology and Stalk Lodging Risk

et al. 2018

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Plants react to the environment and to management interventions by undergoing architectural and structural modifications. A field trial was conducted in China in 2016 to study the effects of the plant population on morphological development of the maize canopy. The main objectives of the current study were (i) to characterize the effects of increased plant density on canopy morphology and stalk lodging and (ii) to explore the relationships between organ morphology and stalk lodging. The field experiment was composed of five plant densities (4.5, 6, 7.5, 9, and 15 plants m−2) of three cultivars: Zhengdan 958 (lodging-resistant cultivar), Longping 206 and Jinqiu 119 (lodging-susceptible cultivars). In response to plant densities of all the three cultivars, the lamina and sheath lengths increased in lower phytomers but decreased in upper phytomers. The lamina width and internode diameter decreased for all phytomers in response to plant densities for all the cultivars. The correlation between organ morphology, plant density and stalk lodging was linear. Data obtained from characterization used in this study (that is, canopy morphology, correlation of organ morphology with stalk lodging traits in response to various plant densities for different cultivars, etc.) will be useful in future modeling studies to predict the morphology characteristics of the canopy affected by interplant competition and stalk lodging.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 92%

Characterization of the Effect of Increased Plant Density on Canopy Morphology and Stalk Lodging Risk

et al. 2018

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“…According to previous studies, the strength of the maize stalk depends on the tissue and morphology, and the morphology of the stalk is largely determined by the mechanical stresses in maize (Von et al, 2015 ). SD, SBS, and RPR were demonstrated to show potential as selective breeding indexes for improving lodging resistance (Liu et al, 2011 ; Xiang et al, 2016 ). The heritability and genetic models vary among different studies since the calculations depend on the experimental populations, design, and conditions (Lynch and Walsh, 1998 ).…”

Section: Discussionmentioning

confidence: 99%

Multi-Locus Genome-Wide Association Study Reveals the Genetic Architecture of Stalk Lodging Resistance-Related Traits in Maize

et al. 2018

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Stalk lodging resistance, which is mainly measured by stem diameter (SD), stalk bending strength (SBS), and rind penetrometer resistance (RPR) in maize, seriously affects the yield and quality of maize (Zea mays L.). To dissect its genetic architecture, in this study multi-locus genome-wide association studies for stalk lodging resistance-related traits were conducted in a population of 257 inbred lines, with tropical, subtropical, and temperate backgrounds, genotyped with 48,193 high-quality single nucleotide polymorphisms. The analyses of phenotypic variations for the above traits in three environments showed high broad-sense heritability (0.679, 0.720, and 0.854, respectively). In total, 423 significant Quantitative Trait Nucleotides (QTNs) were identified by mrMLM, FASTmrEMMA, ISIS EM-BLASSO, and pLARmEB methods to be associated with the above traits. Among these QTNs, 29, 34, and 48 were commonly detected by multiple methods or across multiple environments to be related to SD, SBS, and RPR, respectively. The superior allele analyses in 30 elite lines showed that only eight lines contained more than 50% of the superior alleles, indicating that stalk lodging resistance can be improved by the integration of more superior alleles. Among sixty-three candidate genes of the consistently expressed QTNs, GRMZM5G856734 and GRMZM2G116885, encoding membrane steroid-binding protein 1 and cyclin-dependent kinase inhibitor 1, respectively, possibly inhibit cell elongation and division, which regulates lodging resistance. Our results provide the further understanding of the genetic foundation of maize lodging resistance.

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“…is a dicotyledonous plant of the family Polygonaceae. It is widely grown worldwide (such as India, Russia, Japan, France, Canada, Poland, Slovenia, and Nepal) for its medicinal and nutritive value but could be more fully utilized as a resource for human consumption [1][2][3]. It has been called one of the most complete and nutritious foods, being rich in minerals, vitamins, protein, dietary fiber, amino acids, trace elements, and various bioactive phytochemicals [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…At the same time, farmers are eager to increase the yields of the crop to meet the increasing market demand and improve their overall returns. However, the yield of Tartary buckwheat is very low, typically below 1500 kg ha −1 worldwide [2,10]. The most limiting factor determining yield is unclear and, therefore, there is a lack of agricultural strategies to improve yield, resulting in low and unstable grain yields with current production.…”

Section: Introductionmentioning

confidence: 99%

Post-Anthesis Photosynthetic Properties Provide Insights into Yield Potential of Tartary Buckwheat Cultivars

Xiang

Song

et al. 2019

Agronomy

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Photosynthesis is the basis for plant productivity, and improvement of photosynthetic efficiency is an important way to improve crop yield. However, the relationship between photosynthetic parameters and the yield of Tartary buckwheat (Fagopyrum tataricum) under rainfed conditions is unclear. A two-year field trial was conducted during 2016 and 2017 to assess the photosynthetic capacity of different leaves, dry matter accumulation, and yield of four Tartary buckwheat cultivars from flowering to maturity. The leaves of all cultivars aged gradually after flowering, and the leaf chlorophyll (Chl) and soluble protein (SP) contents, net photosynthetic rates (Pn), transpiration rates (Tr), and stomatal conductance (Gs) tended to decline. The Chl, SP, Pn, Tr, and Gs of cultivars (cvs.) XiQiao2 and QianKu3 were significantly higher than those of LiuKu3 and JiuJiang at each sampling time from 18 days after anthesis to maturity, but the intercellular CO2 content (Ci) showed the opposite trend. Cultivars XiQiao2 and QianKu3 produced more total dry matter (mean 17.1% higher), had higher harvest index (HI, mean 16.4% higher), and yield (mean 29.0% higher) than cvs. LiuKu3 and JiuJiang at maturity, and the difference was remarkably consistent. The yield of all the cultivars was positively correlated with leaf Chl, SP, Pn, Tr, and Gs, but negatively correlated with Ci. At late growth stages, the high-yielding cultivars maintained higher Chl, SP contents, Pn, Tr, and Gs, and showed higher dry matter accumulation and lower Ci than the low-yielding cultivars, consistent with their higher leaf photosynthetic capacity. The important factors determining the yield of Tartary buckwheat were maintaining higher leaf Chl and SP content and photosynthetic capacity and delaying aging during the grain formation stage. Enhanced rates of photosynthesis and dry matter accumulation led to higher post-anthesis accumulation of biomass with a positive impact on grain number and higher yield.

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Effect of planting density on lodging-related morphology, lodging rate, and yield of tartary buckwheat (Fagopyrum tataricum)

Cited by 42 publications

References 15 publications

Characterization of the Effect of Increased Plant Density on Canopy Morphology and Stalk Lodging Risk

Characterization of the Effect of Increased Plant Density on Canopy Morphology and Stalk Lodging Risk

Multi-Locus Genome-Wide Association Study Reveals the Genetic Architecture of Stalk Lodging Resistance-Related Traits in Maize

Post-Anthesis Photosynthetic Properties Provide Insights into Yield Potential of Tartary Buckwheat Cultivars

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