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Rozprawy doktorskie na temat „Wheat sprouting”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 19 lutego 2022

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1

Gold, Catherine Mary. "Pre-harvest sprouting in wheat." Thesis, University of Edinburgh, 1992. http://hdl.handle.net/1842/28116.

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This work examines some of the factors that influence PHS in wheat, with particular emphasis on the premature production of alpha-amylase (PMAA) in the absence of visible sprouting. Field trials in 1989 and 1990 studied alpha-amylase activity in relation to grain development in four winter wheat cultivars. Weather conditions were generally warmer and drier than average in both years. Differences in drying rate were induced by covering and wetting treatments. Fenman had a slower rate of grain drying (40% - 23% moisture) than other varieties, but, within varieties, drying rate appeared not to be

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Pisipati, Sudha R. "Pre-harvest sprouting tolerance in hard white winter wheat." Thesis, Manhattan, Kan. : Kansas State University, 2008. http://hdl.handle.net/2097/1062.

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Ehmke, Laura C. "Impact of controlled sprouting of wheat kernels on bread baking performance." Thesis, Kansas State University, 2017. http://hdl.handle.net/2097/38172.

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Master of Science<br>Department of Grain Science and Industry<br>Rebecca A. Regan<br>A laboratory-scale method for wheat germination was developed and used to compare hard red winter wheat varieties for sprout related attributes, activity, and whole wheat bread baking performance. WB 4458, WB Grainfield, LCS Mint, LCS Wizard, SY Monument, and T158 wheat varieties grown in three Kansas locations were germinated with the developed small-scale germination method and falling number values were compared. Byrd, Tam 204, and T158 were germinated with a scaled-up germination method aimed at generati

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Lin, Meng. "Genetic and genomic studies on wheat pre-harvest sprouting resistance." Diss., Kansas State University, 2016. http://hdl.handle.net/2097/34597.

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Doctor of Philosophy<br>Department of Agronomy<br>Guihua Bai<br>Allan K. Fritz<br>Wheat pre-harvest sprouting (PHS), germination of physiologically matured grains in a wheat spike before harvesting, can cause significant reduction in grain yield and end-use quality. Many quantitative trait loci (QTL) for PHS resistance have been reported in different sources. To determine the genetic architecture of PHS resistance and its relationship with grain color (GC) in US hard winter wheat, a genome-wide association study (GWAS) on both PHS resistance and GC was conducted using in a panel of 185 U.S. el

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Biddulph, Thomas Benjamin. "Mechanisms of dormancy, preharvest sprouting tolerance and how they are influenced by the environment during grain filling and maturation in wheat (Triticum aestivum L.) /." Connect to this title, 2006. http://theses.library.uwa.edu.au/adt-WU2007.0168.

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Bassoi, Manoel Carlos. "Quantitative trait analysis of grain dormancy in wheat (Triticum aestivum L. Thell)." Thesis, University of East Anglia, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251389.

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7

Rugg, Mory. "Evaluation of Hard Red and White Spring Wheat Genotypes for Tolerance to Pre-Harvest Sprouting." Thesis, North Dakota State University, 2012. https://hdl.handle.net/10365/26482.

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Each genotype was exposed to controlled PHS conditions for evaluation of susceptibility or tolerance to sprouting, falling number, kernel color, test weight, and yield. The 24 genotypes were grown in replicated trials at three locations over three years, all data subjected to an analysis of variance. Over three years the genotypes were rated for visual PHS using a 1 to 9 scale, with 1 equivalent to no visual PHS and 9 equivalent to maximum visual PHS. The red genotypes exhibited a higher tolerance to PHS than white genotypes with a mean PHS score of 4.46 compared with 5.16 for white genotypes.

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8

Major, Bernard J. "Environmental factors affecting pre-maturity alpha-amylase activity in winter wheat (Triticum aestivum)." Thesis, Open University, 1999. http://oro.open.ac.uk/54878/.

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Pre-maturity <i>alpha</i>-amylase activity (PMAA) in the absence of sprouting is one of four causes of low Hagberg falling number (HFN) in UK winter wheat (<i>Triticum aestivum</i>), reducing the quality and value of milled flour. Other causes include the retention of pericarp <i>alpha</i>-amylase activity (RPAA), pre-maturity sprouting (PrMS) and post-maturity sprouting (PoMS). This thesis investigated the effects of environmental factors on PMAA which currently occurs in a variable and unpredictable fashion under UK weather conditions. A multi-site field experiment on four cultivars (Haven,

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9

Cato, Larisa, and lcato@awb com au. "The effect of selected enzymes on the quality and structural attributes of white salted and yellow alkaline Asian noodles." RMIT University. Aerospace, Mechanical and Manufacturing Engineering, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20070111.123042.

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Wheat and wheat products represent a major food staple consumed around the world. Asian noodles account for the end-use of at least twelve percent of all wheat produced globally. Whereas there has been extensive research into the role and significance of enzymes in the utilisation of wheat flour in bread-making, less is known of their role in Asian noodles. Accordingly, this study has been based on the hypothesis that some enzymes will have a significant impact on the quality characteristics of at least some styles of Asian noodle products. Five enzymes were selected for study: á

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10

Biddulph, Thomas Benjamin. "Mechanisms of dormancy, preharvest sprouting tolerance and how they are influenced by the environment during grain filling and maturation in wheat (Triticum aestivum L.)." University of Western Australia. School of Plant Biology, 2007. http://theses.library.uwa.edu.au/adt-WU2007.0168.

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[Truncated abstract] Wheat is the main crop in Australia and there are stringent quality requirements. Preharvest sprouting induced by rainfall between maturity and harvest lowers grain quality from premium to feed grades and reduces yield. Wheat production has expanded into the southern Western Australian region where preharvest sprouting occurs in ~1 in 4 seasons and development of more preharvest sprouting tolerant genotypes is required. The main mechanism for improving preharvest sprouting tolerance is grain dormancy. There is genetic variation for dormancy based in the embryo and seed coa

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11

Shao, Mingqin. "QTL mapping of pre-harvest sprouting and stripe rust resistance in wheat cultivars Danby and Tiger." Diss., Kansas State University, 2017. http://hdl.handle.net/2097/38205.

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Doctor of Philosophy<br>Department of Agronomy<br>Guihua Bai<br>Guorong Zhang<br>Wheat yield and quality is influenced by many abiotic and biotic environmental factors. Pre-harvest sprouting (PHS) occurs when physiologically matured spikes are exposed to wet field conditions before harvest, which results in seed germination and causes significant losses in yield and end-use quality. Wheat stripe rust is one of the most important biotic factors reducing grain yield and quality. To investigate the genetic basis of the resistance to PHS and stripe rust in hard white winter wheat cultivars Danby a

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12

Shorinola, Oluwaseyi. "Understanding the genetic and physiological control of pre-harvest sprouting and pre-maturity amylase in UK wheat." Thesis, University of East Anglia, 2015. https://ueaeprints.uea.ac.uk/58447/.

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Pre-harvest sprouting (PHS) and Pre-maturity amylase (PMA) are physiological defects in wheat grains that reduce their end-use quality. PHS is the precocious germination of grains before harvest while PMA is the accumulation of α-amylase in grains. Both traits are quantitative in their expression and are strongly influenced by the environment. In this project, I studied six Quantitative Trait Loci (QTL) located on chromosomes 1A, 2D, 3A (2 loci), 4A and 7B, which confer resistance to PHS or PMA in UK wheat varieties. The aims of this project were to validate and characterise the effects of the

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13

Burt, Kelly R. "Evaluating Methods of Screening for Pre-Harvest Sprouting in Soft Red Winter Wheat and the Effect of Delayed Harvest on Flour Properties." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/36397.

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High pre-harvest rainfall in 2006 caused significant pre-harvest sprouting (PHS) and weathering throughout the mid-Atlantic soft red winter wheat (SRWW) (Triticum aestivum L.) growing region. Sprouting and weathering caused decreased flour quality due to lowered dough viscosity and decreased ability to withstand mixing and processing for baked goods. Due to its decreased quality, severely sprouted grain is sold for feed, at a lower price per bushel. Pre-harvest sprouting negatively affects the chain of production from the field to baking operations. The purpose of this research was to eval

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14

Rosa, Andre Cunha. "Pre-harvest sprouting tolerance of a synthetic hexaploid wheat (Triticum turgidum L. x Aegilops tauschii Coss.)." Thesis, 1999. http://hdl.handle.net/1957/33608.

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Pre-harvest sprouting in wheat costs farmers millions of dollars every year. Pre-harvest sprouting tolerance (PST) has minimized this problem, but improvement of PST is still necessary. Synthetic hexaploid wheats (synthetics) have been used as sources of genes coding for many useful traits. Two studies evaluated the PST of a synthetic (Altar 84/Aegilops tauschii) and investigated its potential as a source of PST in crosses with wheat cultivars. The first study compared the synthetic with selected wheat checks for PST and with its parent Altar 84 for the germination response of these genotypes

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15

Gatford, Keith Trevor. "Seed dormancy mechanisms in diploid wheat (Triticum tauschii (Coss.) Schmalh.)." 2004. http://repository.unimelb.edu.au/10187/1109.

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Wheat is the world’s third largest food crop, and is relied upon as a food source by millions of people. Securing the supply of wheat is a problem because it is susceptible to many biotic and abiotic factors that limit production. One such factor, sprouting of the grain in the head, because of untimely rainfall prior to harvest, is a substantial problem worldwide. Pre-harvest sprouting has a significant impact on wheat growers, who suffer considerable economic hardship as a result of yield loss during harvesting and subsequent downgrading of their sprouted crops. Wheat processors are also

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16

Rathjen, Judith Rebecca. "Role of the seed coat in the dormancy of wheat (Triticum aestivum) grains." 2006. http://hdl.handle.net/2440/57104.

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Title page, contents and abstract only. The complete thesis in print form is available from the University of Adelaide Library.<br>Pre-harvest sprouting (PHS) is an important economic problem which affects a significant proportion of the Australian wheat crop through quality downgrading. Grain dormancy is the most effective means of overcoming germination in the wheat spikelet at harvest maturity. It has been a consistent observation over a long period of time that dormant red-grained wheat genotypes are almost more dormant than dormant white-grained genotypes. In white-grained wheat, there ar

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17

Ogolla, Margaret Auma. "Inheritance of sprouting resistance in common bread wheat (Triticum aestivum L.)." 1985. http://hdl.handle.net/1993/28687.

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Ludwig, Brian Albert. "The association of seed coat colour and other factors with pre-harvest sprouting in wheat." 1989. http://hdl.handle.net/1993/16925.

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19

Rasul, Golam. "Characterizing germplasm and mapping QTLs for pre-harvest sprouting resistance in spring wheat (Triticum aestivum L.)." 2008. http://hdl.handle.net/1993/20922.

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20

Shafqat, Saba. "EFFECT OF DIFFERENT SPROUTING CONDITIONS ON ALPHA AMYLASE ACTIVITY, FUNCTIONAL PROPERTIES OF WHEAT FLOUR AND ON SHELF-LIFE OF BREAD SUPPLEMENTED WITH SPROUTED WHEAT." Thesis, 2013. http://hdl.handle.net/10214/6672.

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In this study sprouting two different wheat cultivars under various environmental conditions revealed that varietal variation is the most important factor affecting α-amylase quantity as well as quality to modify flour functionality significantly, followed by pre-soaking duration and temperature. Sprouted wheat flour post five days germination was utilized at different rates to prepare 100 g composite breads. There was an improvement in baking quality and shelf life of breads containing 1% and 5% sprouted flour resulting in a significantly increased loaf volume, better texture, and less retr

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21

Aljabi, Hanadi Riyad. "Characterization of α-amylase in wheat and maize". Doctoral thesis, 2014. http://hdl.handle.net/11858/00-1735-0000-0028-872A-7.

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Singh, Chandra B. "Detection of insect and fungal damage and incidence of sprouting in stored wheat using near-infrared hyperspectral and digital color imaging." 2009. http://hdl.handle.net/1993/3217.

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Wheat grain quality is defined by several parameters, of which insect and fungal damage and sprouting are considered important degrading factors. At present, Canadian wheat is inspected and graded manually by Canadian Grain Commission (CGC) inspectors at grain handling facilities or in the CGC laboratories. Visual inspection methods are time consuming, less efficient, subjective, and require experienced personnel. Therefore, an alternative, rapid, objective, accurate, and cost effective technique is needed for grain quality monitoring in real-time which can potentially assist or replace the ma

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Jones, Debbie L. "Pre-harvest sprouting resistance in white wheats : testing methodology and inheritance." 1996. http://hdl.handle.net/1993/19223.

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