The effects of grazing on components of grain yield in winter barley

SUMMARYAn experiment, carried out over a 5-year period (1984–88) on medium–heavy textured soil at Athy (Ireland), tested the effect of five sowing dates (early September–early December) and four seed rates (c. 100, 150, 200 and 250 kg/ha) on the grain yield and protein content of winter barley (cv. Panda).September-sown plots gave the greatest yields in all years. Plots sown in mid-October and later gave significantly reduced yields. Yield reductions over the 5-year period averaged 15, 24 and 34% for the mid-October, November and December sowing dates, respectively. Significant differences in yield between the smaller and larger seed rates were obtained, with the latter giving the greatest yields at all sowing dates from late September to December. Increasing the seed rate, however, did not compensate for the yield reduction due to delayed sowing. In the early September-sown plots, the higher seed rates gave reduced yields in four of the five years (1984–87) with the opposite result in 1988. In 1988 the early September-sown plots gave greater yields than the late September-sown plots.Regression analysis showed a strong relationship between yield and log(ears/m2) in four of the five years (1984–87) but the relationship was poor in 1988 primarily due to the inexplicably low ear population of the early-sown plots. The inclusion of 1000-grain weight in the model gave a better fit and accounted for a high proportion (62–80%) of the yield variation.The late September sowing date and the higher seed rates gave slightly lower protein levels in four of the five years. There was an inverse relationship between grain yield and protein for the same four years (1984–87).

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Plant development and grain yield in spring and winter barley

The Journal of Agricultural Science ◽

10.1017/s0021859600041496 ◽

1984 ◽

Vol 102 (1) ◽

pp. 85-95 ◽

Cited By ~ 23

Author(s):

R. P. Ellis ◽

G. Russell

Keyword(s):

Water Stress ◽

Grain Yield ◽

Soil Water ◽

Plant Development ◽

Early Spring ◽

Winter Barley ◽

Considerable Reduction ◽

Rate Of Development ◽

Soil Water Stress

SummaryThe development of spring and winter barley sown in both the spring and autumn has been followed in two seasons. The rates of development were similar in both types for autumn sowings but the spring types developed faster in spring sowings. Differences in the rate of development were related to photoperiod and temperature although soil water stress modified variety response. Yields were higher from autumn and early spring sowings. Sowing in April resulted in a considerable reduction in yield. The significance of these results for barley breeders is discussed.

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A recurrent selection programme for grain yield in winter barley

Euphytica ◽

10.1007/bf00036846 ◽

1988 ◽

Vol 37 (2) ◽

pp. 105-110 ◽

Cited By ~ 7

Author(s):

G. Delogu ◽

C. Lorenzoni ◽

A. Marocco ◽

P. Martiniello ◽

M. Odoardi ◽

...

Keyword(s):

Grain Yield ◽

Recurrent Selection ◽

Winter Barley ◽

Selection Programme

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Effects of fungicides, applied in autumn, and a growth regulator, applied in spring, on the growth and yield of winter barley grown on contrasting soil types

The Journal of Agricultural Science ◽

10.1017/s0021859600067010 ◽

1991 ◽

Vol 117 (3) ◽

pp. 287-297 ◽

Cited By ~ 1

Author(s):

J. F. Jenkyn ◽

R. J. Gutteridge ◽

A. D. Todd

Keyword(s):

Grain Yield ◽

Growth Regulator ◽

Soil Type ◽

Winter Barley ◽

Gaeumannomyces Graminis ◽

Growth And Yield ◽

Soil Types ◽

Take All

SUMMARYExperiments in 1985 and 1986, at Woburn Experimental Farm in Bedfordshire, tested the effects of fungicides, applied in autumn, and a growth regulator, applied at GS3O–31 or GS32–33 in spring, on winter barley grown on two contrasting soil types in each year. Leaf diseases did not become severe in any of the experiments but take-all (Gaeumannomyces graminis var. tritici) was prevalent in 1985. Triadimenol (‘Baytan’) was more effective than flutriafol (‘Ferrax’) in decreasing the severity of takeall and its activity against the disease was related to earliness of sowing.Mean responses in grain yield to the fungicide treatments were mostly small and not significant but did not conflict with the hypothesis that crops on lighter soils benefit more from autumn fungicides than those on heavier soils. Mean effects of the growth regulator sprays were also small but they interacted with both soil type and season. Over the 2 years the later spray applied to crops on the heavier soil gave the largest mean response. Sprays applied to crops on lighter soils were often detrimental to yield, especially in 1985.

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Time of Sowing and the Yield of Winter Barley

The Journal of Agricultural Science ◽

10.1017/s0021859600044099 ◽

1985 ◽

Vol 104 (2) ◽

pp. 405-411 ◽

Cited By ~ 6

Author(s):

C. F. Green ◽

D. T. Furmston ◽

J. D. Ivins

Keyword(s):

Grain Yield ◽

Sowing Date ◽

Winter Barley ◽

Growing Seasons ◽

Linear Decrease

SummaryDuring three growing seasons (1980–3) the influence of sowing date (early September to mid-November) on the yield of winter barley (cv. Igri) was assessed. Delaying sowing resulted in a linear decrease in maximum grain yield at a rate of 0·43 % for every day sowing was delayed. Advancing the date of sowing increased the duration of preanthesis development, increased the level of tillering and hence ear density at harvest. Yield was linearly related to the resultant higher number of grains.

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Genotype by Environment Interaction for Grain Yield of Barley Mutant Lines

Agriculture (Pol nohospodárstvo) ◽

10.2478/agri-2019-0006 ◽

2019 ◽

Vol 65 (2) ◽

pp. 51-58

Author(s):

Boryana Dyulgerova ◽

Nikolay Dyulgerov

Keyword(s):

Grain Yield ◽

Block Design ◽

Genotype By Environment Interaction ◽

Winter Barley ◽

Environment Interaction ◽

Genotype By Environment ◽

Growing Seasons ◽

Stable Mutant ◽

Check Variety ◽

Mutant Lines

Abstract The aim of this study was to examine the genotype by environment interaction for grain yield and to identify high-yielding and stable mutant lines of 6-rowed winter barley under different growing seasons. The study was carried out during 7 growing seasons from 2010 – 2011 to 2016 – 2017 in the experimental field of the Institute of Agriculture – Karnobat, Southeastern Bulgaria. Fourteen advanced mutant lines and the check variety Vesletc were studied using a complete block design with 4 replications. The AMMI analysis of variance indicated that 20.54% of the variation for grain yield was explained by the effect of genotype and 37.34% and 42.12% were attributable to the environmental effects and genotype by environment interaction. The magnitude of the genotype by environment interaction was two times larger than that of genotypes, indicating that there was a substantial difference in genotype response across environments. The AMMI and GGE biplot analyses identified G9 as the highest yielding and stable genotype. This mutant line can be recommended for further evaluation for variety release. The mutant lines G6, G13 and G15 were suggested for inclusion in the breeding program of winter barley due to its high grain yield and intermediate stability.

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