FIELD EVALUATION OF A MODIFIED AUGMENTED DESIGN (TYPE 2) FOR SCREENING BARLEY LINES

1989 ◽  
Vol 69 (1) ◽  
pp. 9-15 ◽  
Author(s):  
K. W. MAY ◽  
G. C. KOZUB ◽  
G. B. SCHAALJE
Keyword(s):  
Hordeum Vulgare ◽  
Environmental Heterogeneity ◽  
Field Evaluation ◽  
Hordeum Vulgare L ◽  
Breeding Lines ◽  
Large Numbers ◽  
Average Change ◽  
Augmented Design ◽  
Design Type

The modified augmented design, which adjusts for environmental heterogeneity when large numbers of test lines are being evaluated in nonreplicated plots, was used in a barley (Hordeum vulgare L.) breeding program at two locations in 3 years. The design offered advantages in flexibility of field operations and was satisfactory for statistical preparation and analyses of the tests. Adjustments in yield based on either the row-column effects or covariance were required in the majority of tests. The relative efficiencies verified the choice of adjustment method indicated by the analysis of variance in 12 of 19 tests. The average change in rank of test lines due to adjustment was often large whereas the average change in yield was generally less than 8%. The design has definite advantages for screening barley breeding lines; however, the agreement between rankings of lines based on the adjusted values and the best estimate of their true ranking needs to be investigated.Key words: Modified augmented design, Hordeum vulgare, barley, screening

Success of a selection program for increasing grain yield of two-row barley lines and evaluation of the modified augmented design (type 2)

1995 ◽  
Vol 75 (4) ◽  
pp. 795-799 ◽  
Author(s):  
K. W. May ◽  
G. C. Kozub
Keyword(s):  
Hordeum Vulgare ◽  
Grain Yield ◽  
Research Centre ◽  
Environment Interaction ◽  
Hordeum Vulgare L ◽  
Genotype Environment Interaction ◽  
Large Numbers ◽  
Augmented Design ◽  
Design Type

The modified augmented design (MAD) (type 2), which adjusts for environmental heterogeneity when large numbers of test lines are being evaluated in non-replicated plots, has been used in the barley (Hordeum vulgare L.) breeding program at the Lethbridge Research Centre. The superiority of test lines selected from two series of F7 test lines selected using the MAD were evaluated in replicated MAD tests (F8) and superior selections were further evaluated in standard replicated designs (F9). When adjustment was indicated for individual MAD tests, the generally high relative efficiencies (RE) confirmed the effectiveness of adjustment in reducing the error variation for yield. The need for adjustment and the adjustment method differed among replicates of the MAD conducted on adjacent blocks of land. The RE from replicated MAD tests indicated the effectiveness of the MAD for reducing the variability in the tests of F8 material. Correlations of the ranks of test lines in different replicates of MAD indicated that more of the same lines in each replicate would be designated as superior with adjustment for heterogenity. The lack of significant positive rank correlations among environments and clearly identifiable improvement in the mean yield was probably the result of the narrowing range in grain yield of the test lines as well as a genotype × environment interaction. Key words: Modified augmented design, Hordeum vulgare, barley, screening

Field evaluation of barley (Hordeum vulgare L.) genotypes derived from tissue culture

1992 ◽  
Vol 72 (3) ◽  
pp. 725-733 ◽  
Author(s):  
A. M. R. Baillie ◽  
K. K. Kartha ◽  
B. G. Rossnagel
Keyword(s):  
Tissue Culture ◽  
Hordeum Vulgare ◽  
Somaclonal Variation ◽  
Heading Date ◽  
Field Evaluation ◽  
Weight Percent ◽  
Field Trials ◽  
Kernel Weight ◽  
Small Scale ◽  
Hordeum Vulgare L

Somaclonal variation has been observed in plants derived via tissue culture in a number of crops, but evaluation has been on a small scale. This study was conducted to evaluate 72 tissue culture-derived barley (Hordeum vulgare L.) genotypes for somaclonal variation in replicated small-plot field trials. Twenty putative somaclones from the cultivar Abee, 20 from Deuce, 15 from Duke and 17 from Heartland were evaluated at three Saskatchewan locations during 1989. Little variation was observed between regenerants and their respective parent cultivars for days to head, height, yield and yield components. When variation did occur it was generally of negative value, i.e., later heading date; lower test weight, 1000-kernel weight, percent plumpness and yield. Of the four groups, those from Deuce and Duke exhibited the most variation. A 5-d difference in heading date was observed for one Duke derivative and 18 of the 20 Deuce derivatives were shorter than the Deuce control. From this study, it was concluded that somaclonal variation would be of no benefit in a plant-breeding program.Key words: Barley, field evaluation, tissue culture, Hordeum vulgare L.

A MODIFIED AUGMENTED DESIGN (TYPE 2) FOR RECTANGULAR PLOTS

1985 ◽  
Vol 65 (3) ◽  
pp. 743-749 ◽  
Author(s):  
CHUANG-SHENG LIN ◽  
GREG POUSHINSKY
Keyword(s):  
Relative Efficiency ◽  
Soil Heterogeneity ◽  
Control Plot ◽  
Adjustment Method ◽  
Experiment Control ◽  
Augmented Design ◽  
Design Type

A modified augmented design (type 2) is presented for the situation where subplots are long and narrow (rectangular plots). The arrangement of the whole plots is the same as in the type 1 modified augmented design, but the subplots are laid out in rows within whole plots. The number of subplots per whole plot is 5, where the centre plot is the control plot. Twelve sets of data generated from three hypothetical fertility maps were used to investigate (i) the choice of adjustment method based on ANOVA of control plots and (ii) the estimated relative efficiencies of the methods. The results showed that the choice of adjustment method based on ANOVA is satisfactory and, although the estimates of relative efficiency differed from the population values, the ranking of the estimates and that of population values was nearly identical.Key words: Augmented design, non-replicated experiment, control of soil heterogeneity

Phenolic linked anti-hyperglycemic bioactives of barley (Hordeum vulgare L.) cultivars as nutraceuticals targeting type 2 diabetes

2017 ◽  
Vol 107 ◽  
pp. 509-517 ◽  
Author(s):  
Ramnarain Ramakrishna ◽  
Dipayan Sarkar ◽  
Paul Schwarz ◽  
Kalidas Shetty
Keyword(s):  
Type 2 Diabetes ◽  
Hordeum Vulgare ◽  
Hordeum Vulgare L

scholarly journals Identification of yellow rust resistance sources in advanced breeding lines of barley (Hordeum vulgare L.)

2019 ◽  
Vol 11 (2) ◽  
Author(s):  
Jogendra Singh ◽  
Om Prakash Gangwar ◽  
P S Shekhawat ◽  
Jaspal Kaur ◽  
Dinesh Kumar ◽  
...  
Keyword(s):  
Hordeum Vulgare ◽  
Rust Resistance ◽  
Yellow Rust ◽  
Hordeum Vulgare L ◽  
Breeding Lines ◽  
Resistance Sources ◽  
Yellow Rust Resistance

scholarly journals Powdery mildew resistance genes in barley varieties grown in Australia

2012 ◽  
Vol 63 (10) ◽  
pp. 997 ◽  
Author(s):  
Antonín Dreiseitl ◽  
Gregory Platz
Keyword(s):  
Hordeum Vulgare ◽  
Powdery Mildew ◽  
Resistance Genes ◽  
Powdery Mildew Resistance ◽  
Specific Resistance ◽  
Recessive Gene ◽  
Hordeum Vulgare L ◽  
Breeding Programs ◽  
Breeding Lines ◽  
New Varieties

Barley (Hordeum vulgare L.) is a major crop in Australia and powdery mildew (Blumeria graminis f. sp. hordei) is one of its most common diseases. Genes for resistance to powdery mildew were postulated for 86 Australian barley varieties and nine advanced breeding lines using 40 reference isolates of the pathogen. Fifty isolates collected in Australia in 2011 were used for additional tests of some varieties. In total, 22 known resistance genes [mlo, Mla1, MlaAl2, Mla3, Mla6, Mla7, Mla8, Mla9, Mla12, Mla13, Mlat, Mlg, MlGa, Mlk1, MlLa, Mlra, Ml(Ab), Ml(Ch), Ml(Dr2), Ml(He2), Ml(Lo) and Ml(St)] were detected. The most frequent genes were Mla8 and Mlg present in 43 and 34 varieties, respectively, while MlGa was found in 12 varieties. Each of the specific resistance genes Mla1, Mla3, Mla6, Mla9, Mla13, Ml(St) and the non-specific recessive gene mlo was found in one variety only. The varieties Maritime and Stirling appear to carry no specific resistance genes. Fifteen unknown resistances were detected. It is recommended that Australian barley breeding programs exploit European varieties possessing mlo to improve the resistance to powdery mildew in new varieties.

scholarly journals Phenotyping and Validation of Root Morphological Traits in Barley (Hordeum vulgare L.)

Agronomy ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1583
Author(s):  
Jidong Wang ◽  
Yinglong Chen ◽  
Yongen Zhang ◽  
Yongchun Zhang ◽  
Yuchun Ai ◽  
...  
Keyword(s):  
Hordeum Vulgare ◽  
Root Length ◽  
Morphological Traits ◽  
Growth Stage ◽  
Root Traits ◽  
Early Growth ◽  
Hordeum Vulgare L ◽  
Breeding Lines ◽  
Early Growth Stage ◽  
Barley Genotypes

Barley (Hordeum vulgare L.) is an important cereal crop, but its sustainable production is significantly hampered due to the presence of various edaphic stresses. Understanding the variability in root morphological traits among diverse barley genotypes is critical for selecting those with suitable root traits for breeding new cultivars better adapted to stress environments. Root morphological traits in an early growth stage (30 days after transplanting) in a panel of 189 barley genotypes (mostly advanced breeding lines) were assessed using a semi-hydroponic phenotyping platform followed by a validation experiment of eight genotypes with contrasting root systems in two soils. The phenotyping experiment showed large variation (coefficient of variation values ≥ 0.25) in 16 of 26 measured root and shoot traits. A strong correlation among most of the selected traits was identified. Principal component analysis indicated four principal components (eigenvalues >1) captured 79.5% of the total variation. Root traits, including total root length, root length at various depths, root diameter and root length ratio (top 20 cm vs. lower section), could be considered in the barley breeding programs. Consistent ranking of the selected eight genotypes based on root biomass and root length in both the semi-hydroponic system and the columns with two different soils confirmed root trait performance in different growth environments as well as the reliability of the phenotyping method. This study identified phenotypic variability in root morphological traits in barley genotypes in the early growth stage. The genotypic variability in root traits represents a basis for mapping quantitative trait loci (QTLs) and molecular markers, particularly focused on breeding lines with optimal root properties for the efficient acquisition of soil resources and adaptation to drought and other abiotic stresses.

Genotype × environment interaction and stability analysis on barley (Hordeum vulgare L.) lines in Algeria

2011 ◽  
Vol 59 (4) ◽  
pp. 325-336 ◽  
Author(s):  
L. Hanifi-Mekliche ◽  
A. Mekliche ◽  
P. Monneveux
Keyword(s):  
Hordeum Vulgare ◽  
Environment Interaction ◽  
Stability Studies ◽  
Heading Time ◽  
Stem Height ◽  
Thousand Grain Weight ◽  
Hordeum Vulgare L ◽  
Breeding Lines ◽  
Growing Seasons ◽  
Genotype Environment Interaction

The objectives of this research were to assess the genotype × environment interaction and to identify barley (Hordeum vulgare L.) genotypes with high stability for grain yield, yield components, straw height, ear length, heading time, straw yield and harvest index. Eighteen barley breeding lines and one commercial cultivar were evaluated under field conditions during five growing seasons. The trials were carried out under both rainfed and irrigated conditions during the first four years and under rainfed conditions only during the last growing season. Stability studies showed significant differences between the environments for all the traits and between the genotypes for thousand-grain weight, heading time and ear length. The genotype × environment interaction was, however, not significant according to the Finlay-Wilkinson analysis. The analysis of correlations between the various traits showed the importance of selecting for earliness, high number of grains/ear, stem height and ear length in order to obtain acceptable grain yields under drought-stressed conditions.

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