Influence of environment on pre-harvest sprouting in winter wheat (Triticum aestivum L.)

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Wheat -- Climatic factors., Germina
Statementby Mary G. Hagemann.
The Physical Object
Paginationvii, 125, [38] leaves, bound :
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Open LibraryOL16550700M

Biggest factor determining the differences in sprouting observed among different wheat lines. Pre-harvest Sprouting and Environment. Environmental conditions both before and after seed maturity influence the rate of PHS.

Before maturity, the. effect of temperature on sprouting depends on the cul-tivar and water availability. Drier conditions generally. Tolerance to pre-harvest sprouting, measured by the response of grain in intact harvested ears to a standard wetting treatment, varied substantially from season to season and in all trials declined with time after harvest ripeness.

The major factor associated with the observed variation in tolerance at harvest and the decline after harvest ripeness appeared to be the level of grain Cited by: Germination begins as a wheat kernel absorbs moisture and swells. Visible characteristics of sprouting include kernel swelling, germ discoloration, split seed coat and emergence of the radicle (root) and/or the coleoptile (shoot).

Pre-harvest sprouting negatively affects subsequent grain quality (test weight), seed viability, seedling vigor, and milling and baking properties. Decreased test weight is caused by. Preharvest sprouting (PHS) is a major problem in wheat (Triticum aestivum L.) that occurs when grains in a mature spike germinate before harvest, resulting in reduced yield, quality, and grain sale ing PHS tolerance is a challenge to wheat breeders because it Cited by: 7.

Pre-harvest sprouting (PHS) in wheat can cause substantial reduction in grain yield and end-use quality. Grain color (GC) together with other components affect PHS resistance.

Several quantitative trait loci (QTL) have been reported for PHS resistance, and two of them on chromosome 3AS (TaPHS1) and 4A have been by:   Pre-harvest sprouting is more likely when grain is exposed to moisture in the form of rain, fog or high relative humidity. While the process may be more likely to begin at lower grain moisture levels, it’s clear that the process can occur as soon as grain.

In order to obtain high levels of environmental adaptability in wheat varieties it is essential they flower at times appropriate to particular environmental conditions. The influence of three distinct genetic systems that together determine time of flowering is reviewed here.

Vernalization genes are seen to be particularly important to winter wheats for their direct or indirect effects on. Key words: wheat, pre-harvest sprouting (PHS), influencing factors, review, breeding. INTRODUCTION Continuous rains after seed maturity may induce the grain sprouting when it is still on the ear before harvest (Groos et al., ).

The pre-harvest sprouting. PDF | On Jul 1,AH Paterson and others published Methods of evaluation for preharvest sprouting resistance in wheat breeding programs | Find, read and cite all the research you need on.

Among abiotic stresses, pre-harvest sprouting (PHS) is a major concern for wheat cultivation in eastern and far-eastern parts of the country due to untimely rains aroun d maturity time.

The PHS in. Pre-harvest sprouting (PHS) refers to germination of seeds in physiologically mature spikes prior to harvest. In Canada, PHS is reported to be a problem during wet or humid harvest conditions (McCaig and DePauw ).Severe losses were reported in three (, and ) of the past 10 years (Clarke et al.

a; Knox et al. ).The economic impact of PHS occurs through losses in grain. Introduction. Pre-harvest sprouting (PHS) refers to germination of seeds in physiologically mature spikes prior to harvest. In Canada, PHS is reported to be a problem during wet or humid harvest conditions (McCaig and DePauw ).Severe losses were reported in three (, and ) of the past 10 years (Clarke et al.

a; Knox et al. Pre-harvest sprouting (PHS) of wheat (Triticum aestivum L.) is an important phenomenon that results in weather dependent reductions in grain yield and quality across the globe. Due to the large annual losses, breeding PHS resistant varieties is of great importance. BACKGROUND. High moisture before harvest can cause sprouting of the wheat kernel, which is termed pre‐harvest sprouting (PHS).

The aim of this study was to examine the variation in physicochemical properties of proteins in PHS‐damaged (sprouted) hard red and white spring wheat. Furthermore, the combination of increased precipitation and decreased radiation also can induce pre-harvest sprouting of winter wheat, i.e.

premature germination of the seed, while it is still attached to the mother plant, which causes important quality constraint to winter wheat (Kulwal et al., ).

Description Influence of environment on pre-harvest sprouting in winter wheat (Triticum aestivum L.) EPUB

The correlation between pre-harvest sprouting area and precipitation in May was (p. Seed dormancy and pre-harvest sprouting in wheat. Pre-harvest sprouting (PHS) in wheat causes downgrading of grain quality, severely limits end-use applications and results in substantial financial losses to farmers and food processors.

Tolerance to PHS is therefore a highly desirable but complex trait sought by plant breeders. cum aestivum L.) growing region experienced higher than average rainfall and cool temperatures during grain fi ll and harvest, result- ing in preharvest sprouting (PHS).

Harvest and storage management of wheat T.S. Payne. Losses of wheat due to inadequate storage and other post-harvest factors at the farm, village and commercial levels of up to 4 percent have been observed (McFarlane, ; Abdullahi and Haile, ), though losses in excess of 40 percent for other cereals are not uncommon (NRC, ).

The additive effects were greater in a mild environment, such as a greenhouse, than in a dry and hot environment during maturation.

Details Influence of environment on pre-harvest sprouting in winter wheat (Triticum aestivum L.) PDF

Pre-harvest sprouting (PHS) constrains wheat production worldwide by reducing both wheat grain yield and end-use quality. Please note that the 2,4-D rate approved for pre-harvest weed control in wheat has been reduced to a maximum of pound per acre, which is equal to 1 pint of a 4-pound formulation or two-third pint of a 6-pound material.

2,4-D also has a day pre-harvest requirement. Continuous rains after seed maturity may induce the grain sprouting when it is still on the ear before harvest (Groos et al., ).

The pre-harvest sprouting (PHS) has been recognized one of the main factors that decreases the yield and quality of crops worldwide especially in wet harvest period.

Pre-harvest sprouting (PHS) refers to the germination of grains in mature cereal spikes before harvest under continuous wet weather conditions [ 1 ]. PHS has adverse impacts on wheat quality and yield [ 2, 3] and reduces baking quality of dough by making it porous, sticky, and off-color. Pre-harvest sprouting (PHS) of wheat (Triticum aestivum L.) is a condition characterized by the early germination of spikes during moist environmental conditions.

PHS lowers yield, degrades the quality of grain and thus limits the profits of wheat. Preharvest sprouting of wheat is possible in parts of Kansas this year due to the excessively wet conditions at harvest time. Wheat in Kansas usually ripens under warm, dry conditions that favor development of excellent grain for bread making.

However, the ripe grain can sprout in the spike when moist conditions delay harvest and promote germination. Much of the High Plains wheat crop is past flowering, but weeks away from harvest, so recent rains may have helped yields and test weights and do not pose a threat of sprouting at this time, Neely said.

Additional information on pre-harvest sprouting in wheat can be found in the AgriLife Extension publication, “Pre-Harvest Sprouting in Wheat. Pre-harvest sprouting (PHS) in wheat severely reduces yield and end-use quality, resulting in substantial economic losses.

The Chinese winter wheat line CAwith white grain, showed high PHS resistance for many years. To identify quantitative trait loci (QTLs) of PHS resistance in this line, F2 plants and the corresponding F2: 3 lines derived from a cross between CA and the PHS.

Influence of Environmental and Agronomic Factors on Pre-Harvest Sprouting. Genotypic and environmental effects on dormancy in-ear sprouting in wheat Expression of seed dormancy in relation to stage of grain development and germination temperature Reduced seed dormancy of wheat caused by molybdenum deficiency.

P reharvest sprouting (PHS) is the precocious germination of grain prior to harvest. This phenomenon occurs when warm and humid or wet conditions are prevalent close to harvest time.

Once initiated, the sprouting process progressively damages grain via the production of α‐amylase and successive endosperm starch degradation.

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Wheat has a minimal seed-dormancy mecha-nism, which can lead to seed sprouting prior to har-vest (pre-harvest sprouting). Once wheat seed has reached harvest maturity, it will begin to germinate when exposed to adequate moisture and tempera-tures.

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For wheat at a harvest-ripe stage (Feekes or Zadock 92), any extended period of wet weather. winter, the late frosts of spring, the high temperatures of June, and the droughts that can occur anytime.

Because of its winter growth habit, wheat is planted during fall, becomes well established before winter, and “greens up” and starts growing quickly when conditions are favorable in spring. Winter wheat not only resists freezing.High pre-harvest rainfall in 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.WINTER WHEATTriticum aestivum Type: winter annual cereal grain; can be spring-planted Roles: prevent erosion, suppress weeds, scavenge excess nutrients, add organic matter Mix with: annual legumes, ryegrass or other small grains See charts, pp.

66 to 72, for ranking and management summary. Although typically grown as a cash grain, winter wheat can provide most of [ ].