Trichome numbers in naked-oat cultivars

2008 ◽  
Vol 147 (1) ◽  
pp. 63-69 ◽  
Author(s):  
A.-M. KIRKKARI ◽  
P. PELTONEN-SAINIO ◽  
L. JAUHIAINEN
Keyword(s):  
Grain Weight ◽  
Test Weight ◽  
Cultivar Differences ◽  
Fine Dust ◽  
Naked Oat ◽  
Combine Harvester ◽  
Oat Cultivars

SUMMARYThe oat kernel, caryopsis or groat, is generally covered with fine silky hairs termed trichomes. The trichomes of naked oat are partly lost during threshing and handling of grains when the lemma and palea are removed and the surface of the grain is exposed. Trichomes can cause itchiness and more serious reactions in those handling the grains. Trichomes also accumulate and form fine dust and can block up machinery. Trichomes are clearly problematic and growers of naked oat are eager to have oat cultivars with reduced numbers of trichomes. Experiments compared the differences in trichome numbers of naked-oat cultivars and threshing settings. The cultivars differed considerably in pubescence. Cultivars Lisbeth and NK 00117 had most trichomes and cv. Bullion the fewest. Completely bare or polished grains were not observed. Pubescence was not associated with grain weight or test weight. However, grains from the lowermost spikelets of the panicle had fewer trichomes than those from the uppermost spikelets. For cv. Bullion, some threshing settings, including increased cylinder speed, slightly increased grain polishing such that grains had some areas completely free of trichomes. Reduction of the concave clearance in the combine harvester had a similar effect. However, threshing settings did not affect the trichomes of cv. Lisbeth. Adjusting threshing machinery settings was generally not an efficient means of solving the problems associated with naked-oat trichomes, but cultivar differences existed and further efforts in breeding to reduce trichome numbers are required.

scholarly journals Reducing grain damage in naked oat through gentle harvesting

2001 ◽  
Vol 10 (3) ◽  
pp. 223-229 ◽  
Author(s):  
A-M. KIRKKARI ◽  
P. PELTONEN-SAINIO ◽  
H. RITA
Keyword(s):  
Moisture Content ◽  
Mechanical Damage ◽  
High Quality ◽  
Naked Oat ◽  
The Third ◽  
Grain Moisture ◽  
Grain Damage ◽  
Combine Harvester ◽  
Oat Cultivars ◽  
Growing Conditions

The caryopsis of naked oat is sensitive to mechanical damage at harvest, especially at high grain moisture content. For producing high quality naked oat seed, it is recommended that harvesting be carried out at as low grain moisture content as possible. This reduces mechanical damage to the grain and promotes germination. Under northern growing conditions, grains are often harvested at 20% moisture content or higher. In this study, reduced grain resulted from using gentler settings on the combine harvester. Two naked oat cultivars and one conventional oat were harvested at different grain moisture content using three combine harvester settings: the first setting that recommended for conventional oat, the second a reduced cylinder speed and the third a narrow concave clearance. The greater the grain moisture content of naked oat at harvest, the more damage was caused by threshing. Lower cylinder speeds tended to result in better germination than higher speeds, even under moist conditions. Narrowing the concave clearance did not affect germination.

The effect of seed rate and growing season on four oat cultivars: II. Culm morphology and panicle conformation

1968 ◽  
Vol 70 (3) ◽  
pp. 405-410 ◽  
Author(s):  
I. T. Jones ◽  
J. D. Hayes
Keyword(s):  
Relative Length ◽  
Field Trials ◽  
Grain Weight ◽  
Seed Rate ◽  
Total Height ◽  
Growing Seasons ◽  
Length Increase ◽  
Total Plant ◽  
Oat Cultivars ◽  
1000 Grain Weight

SUMMARYThe effects of low and high seed rates on height, culm and panicle morphology of four oat cultivars grown in field trials in two growing seasons were investigated. Significant differences were detected between cultivars in the number of extended culm internodes, panicle whorls initiated, total height, length of panicle and individual internodes. Differences in seed rate had no effect on the number of culm internodes, but high seed rate significantly reduced the whorl number in the panicle, total plant height, length of panicle and the three upper internodes. The fourth internode remained unaffected, but the lowermost internode showed a relative length increase at high seed rate. The interaction of cultivar x seed rate was significant for total height, and for the length of the central internodes, but the length of the panicle was similarly affected in all cultivars.Panicle conformation was markedly affected by seed rate; high population density caused a reduction in number of grain-bearing whorls, and reduced the number of spikelets and total grain weight per whorl, and 1000 grain weight particularly in the lowermost whorls. The percentage of husk in the grain was increased slightly at high seed rate. The effect of seed rate on culm and panicle morphology is discussed in relation to the development of stiffer-strawed oats.

Triticale (X Triticosecale Wittmack) Response to Herbicides

1994 ◽  
Vol 8 (1) ◽  
pp. 119-123 ◽  
Author(s):  
Alan C. York ◽  
Stewart M. Turner ◽  
Ronald E. Jarrett
Keyword(s):  
Plant Height ◽  
Kernel Weight ◽  
Grain Weight ◽  
Test Weight ◽  
X Triticosecale ◽  
Affected Plant ◽  
Yield Test ◽  
Triticosecale Wittmack ◽  
X Triticosecale Wittmack

The response of ‘Florico,’ ‘Victoria,’ and 'Stan II’ triticale to 2,4-D, dicamba, 2,4-D plus dicamba, diclofop, and thifensulfuron plus tribenuron applied POST during the tillering stage was examined. At rates twice those recommended for application to wheat, Victoria and Stan II were not injured, and injury to Florico was less than 10%. None of the herbicides or combinations adversely affected plant height at maturity, tiller or spike production, grain weight/spike, kernel weight, kernels/spike, yield, or test weight of any cultivar. Cultivars varied in tiller production, height, yield, test weight, kernel weight, and kernels/spike.

scholarly journals Grain filling parameters in high-yielding ns wheat cultivars

2008 ◽  
pp. 53-58
Author(s):  
Milka Brdar ◽  
Marija Kraljevic-Balalic ◽  
Borislav Kobiljski
Keyword(s):  
Multivariate Analysis ◽  
Nonlinear Regression ◽  
Environmental Conditions ◽  
Dry Weight ◽  
Grain Filling ◽  
Grain Weight ◽  
Cultivar Differences ◽  
Wheat Cultivars ◽  
Estimated Parameters ◽  
Grain Filling Duration

Grain yield of wheat is dependent on grain weight, which is the result of grain filling duration and rate. The study was undertaken to examine the relation between grain weight and rate and duration of grain filling in five high-yielding NS wheat cultivars. Stepwise multivariate analysis of nonlinear regression estimated grain filling parameters was used to examine cultivar differences in grain filling. On the basis of three-year average, the highest grain dry weight had cultivar Renesansa, and the lightest grains were measured for cultivar Evropa 90. Stepwise multivariate analysis indicated that all three nonlinear regression estimated parameters (grain weight, rate and duration of grain filling) were equally important in characterizing the grain filling curves of the cultivars studied, although sequence of their significance varied in different years, which is probably caused by different environmental conditions in three years of experiment.

scholarly journals Variation of grain growth of wheat cultivars

1970 ◽  
Vol 34 (3) ◽  
pp. 351-359
Author(s):  
SK Adhikary ◽  
MZ Alam ◽  
NK Paul
Keyword(s):  
Triticum Aestivum ◽  
Linear Regression ◽  
Grain Growth ◽  
Growth Pattern ◽  
Correlation Coefficients ◽  
Triticum Aestivum L ◽  
Grain Weight ◽  
Regression Coefficients ◽  
Cultivar Differences ◽  
Wheat Cultivars

An experiment was carried out to study the grain growth pattern of wheat (Triticum aestivum L.) cultivars and to find out association and linear regression of spike weight and grain weight with time. Spike characters indicated that cultivar differences were significant in all the cases with a few exceptions. Linear regression and correlation coefficients revealed that the association between both spike weight and grain weight with time were highly positively significant among the cultivars but their regression coefficients were non- significant. Key Words: Grain growth, correlation, regression, wheat. DOI: 10.3329/bjar.v34i3.3960 Bangladesh J. Agril. Res. 34(3) : 351-359, September 2009

scholarly journals To question about breeding naked oat Virovets

2019 ◽  
pp. 8-11 ◽  
Author(s):  
G. A. Batalova ◽  
I. G. Loskutov ◽  
S. N. Shevchenko ◽  
O. A. Zhuikova ◽  
N. V. Krotova ◽  
...  
Keyword(s):  
Grain Quality ◽  
Seedling Emergence ◽  
Considerable Effect ◽  
Grain Weight ◽  
Total Biomass ◽  
Chl A ◽  
Naked Oat ◽  
Volume Weight ◽  
Food And Feed ◽  
Grain Volume Weight

The aim of the research was to develop a cultivar of naked oat with improved traits of productivity and grain quality for cultivation under climate change conditions and utilization in breeding practice as a source of useful economic properties. The pre-flag leaf’s area was found to render a considerable effect on the formation of the number of grains and grain weight in the panicle and on the total biomass (r= 0.78-0.85), while the area of leaves depended on the duration of the period from seedling emergence to wax ripeness (r = ‒0.79) and on agroclimatic conditions during the growing season (HTC, r = 0.76).  The flag leaf’s pigments (Chl a, Chl b, Car) were observed to have a sizable effect on the weight of 1000 grains during the period from flowering to milk ripeness (r = 0.79-0.88). The new naked cultivar ‘Virovets’ (1h07) with improved levels of productivity and grain quality (1000 grain weight: 29.2 g; crude protein content: up to 19.8%; oil of the oleic-linoleic group: 7.71%, grain volume weight: 670 g/l; pubescence: weak) was developed to be cultivated for food and feed purposes and be used in naked oat breeding as a source of high grain quality.

scholarly journals Genetic Similarity Assessment among Selected Naked Oat Cultivars and Breeding Lines Using ISSR Markers

2014 ◽  
Vol 42 (1) ◽  
Author(s):  
Edyta PACZOS-GRZEDA ◽  
Piotr Tomasz BEDNAREK ◽  
Aneta KOROLUK ◽  
Zygmunt NITA ◽  
Zofia BANASZAK ◽  
...  
Keyword(s):  
Genetic Similarity ◽  
Issr Markers ◽  
Breeding Lines ◽  
Naked Oat ◽  
Similarity Assessment ◽  
Oat Cultivars

scholarly journals A comparison of husked and naked oats under Irish conditions

2018 ◽  
Vol 57 (1) ◽  
pp. 1-8 ◽  
Author(s):  
R. Hackett
Keyword(s):  
Grain Yield ◽  
Avena Sativa ◽  
Grain Quality ◽  
Nutritive Value ◽  
Field Experiments ◽  
Naked Oat ◽  
Oat Cultivars ◽  
Naked Oats ◽  
Kernel Yield

AbstractDuring the harvesting of husked oats (Avena sativa L.), the kernel remains tightly enclosed by a lignified lemma and palea, collectively termed the husk or hull. In naked oats, which are the same species as husked oats, the lemma is much less lignified and the kernel threshes free during harvesting. The absence of the largely indigestible husk increases the nutritive value of naked oats compared to that of husked oats, particularly for non-ruminants and poultry. There is little information regarding the potential of naked oats as an arable crop in Ireland. The objective of this study was to determine the productivity of naked oats under Irish conditions. Field experiments were carried out in the south east of Ireland to compare the grain yield and grain quality of both autumn-sown and spring-sown naked and husked oat cultivars. Grain yield of naked oat cultivars was significantly lower than that of husked oat cultivars, irrespective of whether they were autumn sown or spring sown. However, when the kernel yield of husked oat cultivars was estimated, differences in yield between the two types were much smaller, and in some cases, kernel yield of naked oat cultivars exceeded that of husked oat cultivars. Grain quality, as indicated by hectolitre weight and grain N concentration, was generally greater for naked oat cultivars than for husked oat cultivars. It is concluded that under Irish conditions, naked oats have the potential to produce kernel yields equivalent to husked oats. The grain produced is of high quality and may be particularly suited for the nutrition of non-ruminants.

scholarly journals Relationship between QTL for grain shape, grain weight, test weight, milling yield, and plant height in the spring wheat cross RL4452/‘AC Domain’

PLoS ONE ◽  
2018 ◽  
Vol 13 (1) ◽  
pp. e0190681 ◽  
Author(s):  
Adrian L. Cabral ◽  
Mark C. Jordan ◽  
Gary Larson ◽  
Daryl J. Somers ◽  
D. Gavin Humphreys ◽  
...  
Keyword(s):  
Plant Height ◽  
Spring Wheat ◽  
Grain Shape ◽  
Grain Weight ◽  
Test Weight ◽  
Weight Test ◽  
Milling Yield ◽  
Wheat Cross
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