Contribution of growth rate and harvest index to grain yield of oats (Avena sativa L.) following selfing and outcrossing of M1 plants

Euphytica ◽  
1979 ◽  
Vol 28 (2) ◽  
pp. 219-225 ◽  
Author(s):  
B. S. Jalani ◽  
K. J. Frey ◽  
T. B. Bailey
Keyword(s):  
Growth Rate ◽  
Grain Yield ◽  
Avena Sativa ◽  
Harvest Index ◽  
Yield Of Oats

CONTRIBUTION OF GROWTH RATE AND HARVEST INDEX TO GRAIN YIELD IN F9-DERIVED LINES OF OATS (AVENA SATIVA L.)

1980 ◽  
Vol 60 (2) ◽  
pp. 379-384 ◽  
Author(s):  
K. TAKEDA ◽  
K. J. FREY ◽  
T. B. BAILEY
Keyword(s):  
Growth Rate ◽  
Grain Yield ◽  
Plant Height ◽  
Avena Sativa ◽  
Harvest Index ◽  
Heading Date ◽  
Genotypic Correlations ◽  
Day Plot

The contributions of growth rate (GR) and harvest index (HI) to grain yield (GYD) were studied using 1200 F9-derived lines of oats tested for 2 yr. Heritability ranged from 20 to 40% for GYD, GR, and HI. Genotypic correlations of GYD with GR were ca. 0.7 and with HI ca. 0.3. More than 95% of GYD variation was due to GR and HI. An increase of 0.1 g/day/plot GR would result in a 14% increase in GYD, and a 5% increase of HI would cause an 18–19% increase in GYD. GR was positively correlated with heading date and plant height, and negatively with HI.

Changes in mean, variance, and covariation among agronomic traits in successive backcross generations of interspecific matings (Avena sativa L. × A. sterilis L.) of oats

1985 ◽  
Vol 27 (4) ◽  
pp. 426-432 ◽  
Author(s):  
K. Takeda ◽  
T. B. Bailey ◽  
K. J. Frey
Keyword(s):  
Growth Rate ◽  
Grain Yield ◽  
Plant Height ◽  
Avena Sativa ◽  
Vegetative Growth ◽  
Harvest Index ◽  
Interspecific Mating ◽  
Straw Yield ◽  
Days To Heading ◽  
Genotypic Correlations

F2-derived lines from BC0 through BC5 of eight Avena sativa × A. sterilis matings were evaluated for days to heading, plant height, biomass, grain yield, straw yield, harvest index, vegetative growth rate, and unit straw weight. The, A. sativa lines were used as the recurrent parents in all backcrosses. The evaluation experiment was conducted in a randomized-block design with two replicates and microplots each sown with 30 seeds. For summary purposes, the means, variances, and genotypic correlations from the four matings with the same recurrent parent were pooled within each level of backcrossing. Regression analyses were used to describe the rates of change for genotypic variances and correlations as number of backcrosses increased. In all matings, the trait means regressed toward the recurrent parents as backcrossing progressed. Harvest index was controlled by additive gene action; earliness was partially dominant and tallness was completely dominant; heterobeltiosis occurred for high vegetative growth rate; straw yield and biomass showed either heterobeltiosis or complete dominance; and high grain yield was partially dominant. Unit straw weight showed a positive heterobeltiosis. Log genotypic variances decreased significantly over backcrosses for days to heading, straw yield, and harvest index, whereas for plant height and unit straw weight, the reductions were not significant. Regressions of genotypic correlations were significant for only 12 of 56 trait associations, and changes that did occur were of little consequence.Key words: backcross, interspecific mating, oats.

Spatial variability of selected soil properties and its impact on the grain yield of oats (Avena sativa L.) in small fields

2018 ◽  
Vol 41 (19) ◽  
pp. 2446-2469 ◽  
Author(s):  
Ruth-Maria Hausherr Lüder ◽  
Ruijun Qin ◽  
Walter Richner ◽  
Peter Stamp ◽  
Christos Noulas
Keyword(s):  
Spatial Variability ◽  
Grain Yield ◽  
Soil Properties ◽  
Avena Sativa ◽  
Small Fields ◽  
Yield Of Oats

scholarly journals Genetic Variability and Association of Morpho-physiological Traits in Bread Wheat (Triticum aestivum L.)

2020 ◽  
pp. 95-105
Author(s):  
Puneet Kumar ◽  
Y. P. S. Solanki ◽  
Vikram Singh ◽  
. Kiran
Keyword(s):  
Growth Rate ◽  
Genetic Variability ◽  
Grain Yield ◽  
Grain Growth ◽  
Harvest Index ◽  
Flag Leaf ◽  
Grain Weight ◽  
Spike Number ◽  
Biological Yield ◽  
1000 Grain Weight

The experiment was conducted with 60 genotypes of bread wheat. These genotypes were grown in RBD using three replications during Rabi 2016-17 at Research Area of Wheat and Barley Section, Department of Genetics and Plant Breeding, CCS HAU, Hisar. To study the variability, correlation and path analysis, data were recorded for yield and its component traits i.e. days to 50% heading, days to anthesis, grain growth rate at 14, 21, 28 days (mg/g/day), plant height (cm), number of effective tillers/meter, flag leaf length (cm), flag leaf width (cm), flag leaf area (cm2), spike length (cm), number of spikelets per spike, number of grains per spike, 1000 grain weight (g), grain yield per plot (g), biological yield/plot (g) and harvest index (%). ANOVA showed highly significant differences among the genotypes for all the traits indicating adequacy of material and the traits studied for further assessment of genetic variability parameters. High value of GCV and PCV was recorded for grain yield per plot, followed by biological yield, indicating greater amount of variability among the genotypes. Highest heritability was recorded for days to 50% heading, followed by days to anthesis. Highly significant and positive association was perceived between grain yield and tillers per meter, plant height, number of grains per spike, number of spikelets per spike, flag leaf area, grain growth rate at 14, 21 and 28 days after anthesis, spike length, 1000 grain weight, biological yield and harvest index. The high direct effects were recorded for biological yield, harvest index, flag leaf breadth, number of effective tillers per meter and 1000 grain weight, in order.

Repeatability of regression stability indexes for grain yield of oats (Avena sativa L.)

Euphytica ◽  
1976 ◽  
Vol 25 (1) ◽  
pp. 21-28 ◽  
Author(s):  
Tunde Fatunla ◽  
K. J. Frey
Keyword(s):  
Grain Yield ◽  
Avena Sativa ◽  
Stability Indexes ◽  
Yield Of Oats

scholarly journals Pre- and postheading growth rate and its association with grain yield in barley.

1990 ◽  
Vol 38 (2) ◽  
pp. 109-115
Author(s):  
A.A. Salman ◽  
M.A. Brinkman
Keyword(s):  
Growth Rate ◽  
Experimental Design ◽  
Grain Yield ◽  
Growth Rates ◽  
Harvest Index ◽  
Growth Traits ◽  
Correlation Coefficients ◽  
Yield Improvement ◽  
Barley Cultivars

Preheading and postheading growth rates, grain yield and other traits were evaluated in 5 cultivars grown at 2 sites in Wisconsin (Madison in 1985 and Arlington in 1985 and 1986). The experimental design was a randomized complete block with 4 replications. Significant differences were observed among cultivars in preheading and postheading growth rates and DM accumulation. Correlation coefficients for growth rate at maturity and postheading growth rate with grain yield were highly significant (r = 0.93 and 0.79, respectively). Robust produced the highest grain yield (363.1 g/msuperscript 2). There were significant differences among cultivars in harvest index which was also correlated with grain yield (r = 0.41). Thus, differences in preheading and postheading growth traits among barley cultivars are highly associated with yield and may be useful for grain yield improvement. (Abstract retrieved from CAB Abstracts by CABI’s permission)

scholarly journals Impact of Tillage and Vegetative Mulch on Growth and Yield of Maize under Ferralitic Soil Conditions in Southern Benin

2020 ◽  
pp. 26-36
Author(s):  
Mahugnon Socrate Agonvinon ◽  
Alladassi Felix Kouelo ◽  
Tobi Moriaque Akplo ◽  
Julien Avakoudjo ◽  
Pascal Houngnandan ◽  
...  
Keyword(s):  
Growth Rate ◽  
Grain Yield ◽  
Harvest Index ◽  
Growth Parameters ◽  
Block Design ◽  
Growth And Yield ◽  
Soil Conditions ◽  
No Tillage ◽  
Two Factors ◽  
Southern Benin

Aims: Crop production is exposed to climate change phenomenon resulting in change in rainfall amount and long drought spells. Good conservation practices are important in yield improvement. This study aims to assess the effect of tillage and vegetative mulch on maize growth rate, yield and harvest index in ferralitic soil of southern Benin. Study Design: The complete randomized block design (CRBD) with 4 repetitions was implemented. Place and Duration of Study: The experimental site is located at Allada, in southern Benin, and conducted between May 2017 and July 2017. Methodology: During this study, two factors were tested (Tillage and mulch) and 6 treatments have been obtained of combination of two factors level (No-tillage, tillage and 0%, 50%, 75% mulch). The growth parameters, yield parameters and harvest index were determined. Results: The results indicated that tillage and mulching significantly influenced the growth rate, leaf surface and leaf number of maize plants. Tillage increased to 54% the grain yield compared to no tillage whereas 50% and 75% mulch promoted the highest grain yield. Considering the combination of tillage and mulching, LM50 (Tillage + 50% mulch) and LM75 (Tillage + 75% mulch) treatments resulted in about 85% increase of grain yield compared to direct seeding without mulch. Conclusion: These results reflect the importance of soil cover in improving of maize productivity.

scholarly journals Effect of Mineral -Biofertilizer on Physiological Parameters and Yield of Three Varieties of Oat (Avena sativa L.)

2019 ◽  
Vol 32 ◽  
pp. 8-25
Author(s):  
Lamiaa M. Al-Freeh ◽  
Sundus A. Alabdulla ◽  
Kadhim H. Huthily
Keyword(s):  
Growth Rate ◽  
Grain Yield ◽  
Leaf Area ◽  
Seed Yield ◽  
Avena Sativa ◽  
Field Experiments ◽  
Sandy Loam ◽  
Mineral Fertilizer ◽  
Physiological Parameters ◽  
Area Index

To study the effect of biofertilizers on physiological parameters and yield  of three varieties of Oat (Avena sativa L.), field experiments were conducted during winter seasons 2016-2017 and 2017-2018 at Al- Zubair district (20 km. West of Basrah province) in sandy loam soils. A split plot arrangement, using RCBD with three replicates, the main plots contained varieties: V1 (Genzania), V2 (Shaffaa),  V3  (Carloup), Biofertilizer, treatments were at the sub plots: B0 (control), B1 (NPK mineral fertilizer as recommended), B2 (biofertilizers NPK), B3 (mineral fertilizer PK+ biofertilizers N), B4 (mineral fertilizer K+ biofertilizers NP), B5 (mineral fertilizer P + biofertilizers NK), B6 (mineral fertilizer N + biofertilizers PK). Data were collected on Flag leaf area FLA, Leaf area duration LAD, Leaf area index LAI, Crop growth rate CGR, Relative growth rate RGR, Net assimilation rate NAR, Plant high Tillers number m2 and grain yield t ha-1. The results showed that the adding of biofertilizers NPK (B2) led to a significant increase in the studied traits (FLA, LAD, LAI, CGR, RGR, NAR, and grain yield). The grain yield were increased about 189.96 and 197.3% as compared with control in each seasons respectively. Cultivar Genzania resulted in highest grain yield among studied varieties in the first season (5.774 t ha-1), while cultivar Shaffa  gave the highest grain yield in the second season (8.691 t ha-1). The interaction between Ganzania and B2 treatment recorded the highest seed yield (8.429 tan ha-1) in the first season. While, in the second season all varieties that interacted with B2 treatment produced the highest seed yield.

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