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  • 1
    Electronic Resource
    Electronic Resource
    Frequency of control plots in screening nurseries for protein content (1976)
    Springer
    Euphytica 25 (1976), S. 387-391 
    Details
    ISSN: 1573-5060
    Keywords: Triticum aestivum ; wheat ; Hordeum vulgare ; barley ; screening nursery ; distance between control plots ; protein content ; correlation coefficient
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Correlation coefficients were calculated in two seasons, between protein content of control plots of ‘Kyperounda’ durum wheat and ‘Athenais’ barley sown at distances of from 0.6 m to 68.4 m. Simple correlation coefficients were high (0.737, 0.710 and 0.311) and significant at the 1% level of probability for plots 0.6 m apart, but decreased rapidly with increasing distances between plots. The correlation in four nurseries was significant for plots 7.2 m, 4.2m, 4.2 m and 1.8 m apart. It was concluded that a control plot provides a fairly good measure of the protein content of adjacent plots.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00041571
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  • 2
    Electronic Resource
    Electronic Resource
    Factors affecting genotypic and environmental variance for crude protein content in cereals (1978)
    Springer
    Euphytica 27 (1978), S. 117-126 
    Details
    ISSN: 1573-5060
    Keywords: Hordeum vulgare ; barley ; Triticum aestivum ; Triticum durum ; wheat ; genotypic variance ; environmental variance ; protein content ; nitrogen fertilizer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The effects of N fertilizer, irrigation and location on genotypic and environmental variances of barley and wheat varieties were studied in a series of trials. Genotypic variance for crude protein content, as well as for grain yield, tended to be higher under high N fertilizer rate (80 kg N/ha). The effect of N fertilizer rate on environmental variance varied with variety and location. Increase in crude protein content resulted in decrease in environmental variance for only a few of the varieties tested. The effect of quantity of irrigation water on genotypic and environmental variance for crude protein content was small.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00039126
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  • 3
    Electronic Resource
    Electronic Resource
    The stability of the number of tillers of barley varieties and its relation with consistency of performance under semi-arid conditions (1985)
    Springer
    Euphytica 34 (1985), S. 641-649 
    Details
    ISSN: 1573-5060
    Keywords: Hordeum vulgare ; barley ; number of tillers ; stability of number of tillers ; consistency of performance ; semi-arid conditions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary In 1981/82 60 barleys varieties were grown at 18 environments (three locations, three seed rates, two soil fertility regimes) and in 1982/83 22 varieties were grown again at 21 environments (seven locations, three seed rates). Grain yield was recorded only in the second year. The estimates of variances sx 2 (untransformed data) and s2 logx (transformed data) for number of tillers and grain yield varied significantly among varieties. When untransformed data were used, high tillering varieties had a higher variance for number of tillers per unit area than low tillering varieties. When the variation was measured by CV of untransformed data or by s2 logx on transformed data a reverse relation occurred, i.e. the correlation coefficient between number of tillers and the variation of number of tillers was negative. High grain yielding varieties had a high mean number of tillers and a low variance for number of tillers per unit area when transformed data were used to compute variances. All interactions between variety, seed rate and location for grain yield were significant. The regression analysis of variety grain yield (Y) on environment mean grain yield (X) gave regression coefficients, b, ranging from 0.51 to 1.69. There was no significant correlation between regression coefficient and grain yield. The highest yielding varieties had b values around 1.0. High grain yielding varieties had low variance of yield over environments and low values for deviations from the regression when transformed data were used. However, the correlations between mean yield and variance for yield or mean yield and deviations from regression were positive when untransformed data were used. From this study it is concluded that high mean number of tillers per unit area and low variance for number of tillers could be used in selecting varieties with consistently high yield at varying environments. Techniques are proposed for application early in the breeding programme, i.e. in segregating population or in nurseries.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00035399
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  • 4
    Electronic Resource
    Electronic Resource
    Environmental correlations among grain yield and other important traits of wheat in drylands (1989)
    Springer
    Euphytica 44 (1989), S. 143-150 
    Details
    ISSN: 1573-5060
    Keywords: Triticum aestivum ; wheat ; Triticum durum ; durum ; environmental correlations ; grain yield ; plant height ; tiller number ; grain size
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Environmental correlation coefficients were computed among all pairs of five traits, namely grain yield, heading date, number of tillers per m2, plant height and 1000-grain weight (grain size) using 30 Triticum durum and 30 Triticum aestivum varieties grown in 18 environments. Grain yield was significantly correlated with the other four traits in almost all of the varieties. The mean correlation coefficient over all varieties ranged from 0.58 to −0.83 for durum wheat and 0.66 to 0.88 for aestivum wheat. The correlation coefficients between heading date and the other traits were also significant, ranging from −0.45 to −0.79 in durum wheat and −0.61 to −0.85 in aestivum wheat. The correlation coefficient between number of tillers with plant height and 1000-grain weight were the smallest, 0.19−0.32 in durum wheat and 0.39−0.60 in aestivum wheat. It was concluded that agronomic practices favouring early and good stand establishment in the dry regions will favour the yield components and important adaptive traits, which contribute towards larger yields. Significant differences were found among genotypes in the environmental correlation coefficients and the associated changes in one trait as a result of changes in other traits.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00022609
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  • 5
    Electronic Resource
    Electronic Resource
    Stability of 1000-grain weight and its relation with other traits of barley in dry areas (1990)
    Springer
    Euphytica 51 (1990), S. 11-17 
    Details
    ISSN: 1573-5060
    Keywords: Hordeum vulgare ; barley ; 1000-grain weight ; yield components ; stability of traits
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The effects of 1000-grain weight, its stability and the correlation coefficients with other traits of 50 barley varieties were studied at 18–20 environments. Additional material was used to study genotypic correlations among traits. Significant differences in stability of 1000-grain weight were found among varieties. Two-row varieties were on average more stable than 6-row varieties. The 1000-grain weight was among the most stable and grain yield the most variable traits. This was discussed in connection with stem reserves translocation to the grain. Consistently high yielding varieties had around average stability of 1000-grain weight. Regression coefficient, b, for 1000-grain weight was positively correlated with variance of log transformed data, both valid estimates for stability of 1000-grain weight. The correlation coefficient of 1000-grain weight with grain yield was positive or non-significant, with number of grains per tiller mainly negative and with volume weight it was positive. In 6-row barley, 1000-grain weight was positively correlated with grain yield, straw yield, total biological yield, and plant height, and negatively with number of tillers per m2 and number of grains per tiller.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00022887
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  • 6
    Electronic Resource
    Electronic Resource
    Genetic and environmental effects on vitreousness of durum wheat (1979)
    Springer
    Euphytica 28 (1979), S. 711-716 
    Details
    ISSN: 1573-5060
    Keywords: Triticum durum ; vitreousness ; nitrogen fertilization ; genotypic variance ; location ; environmental effect ; protein content
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The effect of genotype, nitrogen fertilization and location on vitreousness of 20 durum wheat varieties was studied under rainfed conditions. All these interacting factors affected virtreousness with genotype being the most important. Nine of the varieties tested, produced grains of high vitreousness under different environmental conditions even without nitrogen fertilization. Screening for vitreousness appeared more efficient if no nitrogen fertilization is used and in locations where vitreousness is generally low. There was a tendency for largeseeded varieties to produce grains of high vitreousness. Vitreousness of varieties was correlated with crude protein content when nitrogen supply was low. It was concluded that breeding is a very potent way to improve vitreousness.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00038938
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  • 7
    Electronic Resource
    Electronic Resource
    The use of wild barley in crosses for grain production under dryland conditions (1993)
    Springer
    Euphytica 69 (1993), S. 211-218 
    Details
    ISSN: 1573-5060
    Keywords: breeding ; drylands ; Hordeum vulgare ssp ; agriocrithon ; Hordeum vulgare ssp. spontaneum ; Hordeum vulgare ssp. vulgare ; wild barley
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Crosses of wild barley (Hordeum vulgare ssp. spontaneum and Hordeum vulgare ssp. agriocrithon) with Hordeum vulgare ssp. vulgare were used to select high yielding grain types under dryland Mediterranean conditions. No special difficulties were faced in making the crosses, in eliminating the brittle rachis genes from the grain types or in selecting 6-rowed types in crosses between 2-rowed wild barley and 6-rowed ssp. vulgare varieties. Brittle rachis genotypes, present in the segregating populations were used in developing self-reseeding permanent pastures for dry areas. The best selections were tested in seven trials during 1989–92 and some of them outyielded their parents and also the best improved check variety by 13–22%. Indications for transgressive segregation were obtained for grain yield, straw yield, total biological yield, harvest index and volume weight. The crude protein content of some of the selections was significantly higher than that of the checks. For breeding programs aiming at large seeds, special ssp. spontaneum lines should be used as parents. High grain yield was positively correlated with high straw yield, total biological yield, earliness in heading date, high harvest index and negatively with volume weight. It was concluded that unexploited useful genes, even when not directly observed in wild barley, could be transfered easily into high yielding genotypes by breeding.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00022367
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  • 8
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    Registration of ICGV 88438, ICGV 89214, and ICGV 91098 Peanut Germplasm (1997)
    Wiley
    Details
    Publication Date: 1997-11-01
    Print ISSN: 0011-183X
    Electronic ISSN: 1435-0653
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Wiley
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  • 9
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    Effect of harvesting stage on cereal and legume forage production in low rainfall regions (1976)
    Cambridge University Press
    Details
    Publication Date: 1976-02-01
    Description: SUMMARYThe effect of stage of harvesting on dry-matter (D.M.) yield and chemical composition of barley, wheat and the legumes common vetch (F. sativa), woollypod vetch (F. dasycarpa) and fodder peas (P. sativum) were studied in Cyprus under low rainfall conditions in a series of trials sown in four successive years. Cereals were harvested at the beginning of heading, 50% heading and the milk stage of grain, and legumes at three stages from preflowering to full pod formation, D.M., protein and digestible D.M. yields and percentage D.M. content increased with age, whereas percentage protein content and D.M. digestibility declined. Under moisture stress conditions before and during the harvesting period D.M. yields did not increase significantly with age. Protein content of cereals under low rainfall conditions was higher than that of cereals grown in the U.K. under higher N fertilization levels. Rainfall conditions affected drastically the performance of both cereals and legumes. However, average yields were satisfactory; the barley variety 628 gave 8·98 t/ha, the highest D.M. yield among all cereal and legume varieties.
    Print ISSN: 0021-8596
    Electronic ISSN: 1469-5146
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Cambridge University Press
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  • 10
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    Edge effects on yield, yield components and other traits in mechanized durum wheat and barley trials (1983)
    Cambridge University Press
    Details
    Publication Date: 1983-10-01
    Description: SUMMARYA series of trials were conducted during 1979–82 under semi-arid conditions in a Mediterranean-type environment to study the edge effects in mechanized durum wheat and barley variety trials when uncropped pathways are left between plots. Varietal differences in edge effects on grain yield were in most trials not significant. Thus, edge effects do not distort significantly the relative ranking of varieties.Edge effects were significant for all traits studied and higher in grain and straw yields. These effects were also higher in drier seasons. The overestimation of grain yield from whole plots was 13–18% in relatively high rainfall seasons and 29% in a dry season. In two seasons the scores on the two outer rows were higher than on the two central rows by 89 and 117 % for grain yield, by 72 and 73% for straw yield, by 44 and 48% for numbers of tillers, by 6% for 1000-grain weight and by 14 and 40% for number of grains per tiller. The edge effect was not confined to the outer rows, but it extended to the inner rows of the plot; the magnitude of this effect varied with season and trait.Rows adjacent to the pathway and unprotected from wind had a lower value for all traits than the opposite rows of the pathway, which were protected by the inner rows.
    Print ISSN: 0021-8596
    Electronic ISSN: 1469-5146
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Cambridge University Press
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