Competition Among Oat Varieties Grown in Hill Plots<sup>1</sup>

Smith, O. D.; Kleese, Roger A.; Stuthman, D. D.

doi:10.2135/cropsci1970.0011183x001000040020x

Cited by 23 publications

(11 citation statements)

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“…Plant spatial arrangement, or planting pattern, may be an important factor determining individual crop plant performance (Mead 1966, Smith et al 1970, Pant 1979, Soetono and Puckridge 1982, Auld et al 1983, Hayward and Vivero 1984. To improve the screening process, a methodology must be developed to quantify spatial arrangement as a source of variation in plant growth.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Plant Population Spatial Arrangement on Individual Plant Yield

Lindquist¹,

Rhode²,

Puettmann³

et al. 1994

Ecological Applications

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Abstract. Two greenhouse experiments were conducted to evaluate the performance of individual oat (Avena sativa) target plants as influenced by neighbor oat plants with different spatial arrangements. Crop spatial arrangement was separated into three components: (I) population density, (2) distance between plants (distance dispersion, DD), and (3) angular arrangement of plants about one another (angular dispersion, AD). Distance dispersion was quantified using a weighted mean distance from a target individual to its neighbors. Angular dispersion of neighbors around the target was quantified using a measure of circular variance. DD and AD were combined to create a dispersion index (DI). At constant density, distance dispersion treatments were combined with angular dispersion treatments in a randomized-block factorial design. Target plant biomass production was predicted using a rectangular hyperbola equation including population density, DD, AD, and DI as independent variables. Fifty-five and 44% of the residual variation (the variation not accounted for by density alone) in individual plant yield was accounted for when spatial arrangement (DI) was added to the regression. The approach can be used to compare the intensity of competition among different crop planting patterns.

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Section: Introductionmentioning

confidence: 99%

The Influence of Plant Population Spatial Arrangement on Individual Plant Yield

Lindquist¹,

Rhode²,

Puettmann³

et al. 1994

Ecological Applications

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“…Plant height, maturity, tillering capacity, and root system development all influence competitive ability. Tall and late-maturing cultivars typically exhibit superior competitive ability when grown with shorter, earlier-maturing cultivars (Castleberry, 1986;Hoekstra et al, 1985;Smith et al, 1970;Thorne and Fehr, 1970). However, Jensen and Federer (1965) noted a high tillering capacity and extensive root system characterizing the most competitive wheat (Triticum aestivum L.) cultivar in their studies.…”

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Interhybrid Competition Affects Sunflower Character Expression

Schneiter

1998

Agronomy Journal

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Field researchers are confronted with selection of the proper plot design to assure agreement of small‐scale experimental plot results with large‐scale commercial field production. The objective of this research was to investigate the effect of plot design on expression of hybrid sunflower (Helianthus annuus L.) characters. Field studies were conducted in North Dakota at three dryland sites: Carrington, Fargo, and Prosper. lnterhybrid and intrahybrid competitive situations were attained by using one‐row or two‐row hybrid arrangements with three hybrids as possible borders. Competitive effects were determined on achene yield, achene oil concentration, achene weight, test weight, days to anthesis, head diameter, plant height, and leaf number. Plot achene yield was 20% greater when the border hybrid was a semidwarf than when border hybrids were of more conventional height. Border hybrid competitive influences on achene yield were approximately twice as great for one‐row as for two‐row arrangements. Other characters influenced by interhybrid competition were test weight, head diameter, and plant height. Characters not influenced by interhybrid competition included achene weight, achene oil concentration, days to anthesis, and leaf number. Plot border rows are recommended when evaluating characters subject to interhybrid competitive influences. An alternative approach is using one‐row or two‐row arrangements and grouping hybrids similar in plant height and maturity in the same field proximity.

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“…(Smith et al 1970), unfair ranking of cultivars using mean yields (Baker and Leisle 1970), or insufficient replication (Walsh et al 1976 Frey (1965) and Walsh et al (1976). As is apparent in the computational formula presented in Materials and Methods, this statistic requires estimation of genetic parameters also used in computing heritabilities.…”

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confidence: 99%

COMPARISON OF HILL AND ROW PLOTS FOR AGRONOMIC AND QUALITY TRAITS IN SPRING MALTING BARLEY (Hordeum vulgare L.)

Hayes¹,

Jones²

1990

Can. J. Plant Sci.

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Provided they reliably predict row plot performance, hill plots should be useful for doubled haploid recurrent selection in malting barley (Hordeum vulgare L.). The primary objective of this research was to compare hill and row plot expression of agronomic and malting quality traits in an array of elite spring habit barley germplasm grown under irrigated conditions. A supporting objective was to identify an appropriate seeding rate for hill plot evaluation. Eight-replicate hill plots at four seeding rates (10, 20, 30, and 40 seeds per hill) were compared with adjacent four-replicate row plots in each of three environments. Genotype and genotype × environment interactions were significant for most agronomic traits in both plot types. Significant, linear genotype responses to hill plot seeding rates were observed for most agronomic traits. Seeding rate had no consistent effect on the expression of malting quality. The percentage of lines in common in the two plot types at 25 and 50% selection intensities was the most useful comparison statistic and indicated hill plot selection should be effective for most agronomic and malting quality traits. Although yield heritability estimates were consistently high in both hill and row plots, there was little relationship between trait expression in the two plot types. Differential tillering in response to hill plot competition is likely responsible. A seeding rate of 10 seeds per hill should be appropriate in preliminary screening for traits amenable to hill plot selection in irrigated spring habit malting barley.Key words: Hordeum vulgare L., malting quality, breeding methods, barley

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Competition Among Oat Varieties Grown in Hill Plots¹

Cited by 23 publications

References 0 publications

The Influence of Plant Population Spatial Arrangement on Individual Plant Yield

The Influence of Plant Population Spatial Arrangement on Individual Plant Yield

Interhybrid Competition Affects Sunflower Character Expression

COMPARISON OF HILL AND ROW PLOTS FOR AGRONOMIC AND QUALITY TRAITS IN SPRING MALTING BARLEY (Hordeum vulgare L.)

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Competition Among Oat Varieties Grown in Hill Plots1

Cited by 23 publications

References 0 publications

The Influence of Plant Population Spatial Arrangement on Individual Plant Yield

The Influence of Plant Population Spatial Arrangement on Individual Plant Yield

Interhybrid Competition Affects Sunflower Character Expression

COMPARISON OF HILL AND ROW PLOTS FOR AGRONOMIC AND QUALITY TRAITS IN SPRING MALTING BARLEY (Hordeum vulgare L.)

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Competition Among Oat Varieties Grown in Hill Plots¹