Yield Stability Studies in Short-Season Maize. I. A Descriptive Method for Grouping Genotypes

Francis, Tsiboe; Kannenberg, L. W.

doi:10.4141/cjps78-157

Cited by 468 publications

(411 citation statements)

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“…A grouping methodology, as previously described by Francis and Kannenberg (1978), was used to further explore treatment responses for disease severity and grain yield. The mean and coefficient of variation (CV) were estimated for each treatment of interest across sites and replicates.…”

Section: Resultsmentioning

confidence: 99%

The impact of fungicide and herbicide timing on foliar disease severity, and barley productivity and quality

et al. 2015

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. 2015. The impact of fungicide and herbicide timing on foliar disease severity, and barley productivity and quality. Can. J. Plant Sci. 95: 525Á537. There is interest in mixing herbicides with a half-rate of fungicide at herbicide timings for barley in western Canada. At six sites across the Canadian prairies from 2010 to 2012 combinations of herbicide and the fungicide Tilt † (propiconazole) were applied to barley at the two-to three-leaf stage (herbicide and half-rate fungicide), five-to six-leaf stage (herbicide and half-rate fungicide), and/or the flag leaf stage (full or half-rate fungicide only). Each plot area was cross-seeded with tame oat as a model weed prior to seeding. Upper canopy leaf samples were collected for leaf disease assessment at the early dough growth stage. Weed biomass, and grain yield and quality were determined. Total leaf area diseased (a combination of scald, both forms of net blotch and spot blotch) was greater for the two-to three-or five-to six-leaf stage herbicide-only treatments and the combination herbicide and half-rate fungicide treatments compared with fungicide at the flag leaf stage. Yield, 1000-kernel weight, kernel plumpness and test weight were greatest and kernel thins lowest for treatments with a flag leaf stage fungicide application. Split applications of fungicide at the time of herbicide application and at flag leaf emergence did not improve disease management and crop productivity compared with a single full rate fungicide application at the flag leaf stage. Weed biomass was generally not influenced by the treatments because weed control was excellent at all sites. However, yield was lower when herbicide was applied at the five-to six-leaf versus the two-to three-leaf stage. For improved leaf disease management and yield in barley, fungicide applications should include a flag leaf stage timing for adequate protection of upper canopy leaves, which are key contributors to yield and grain filling. Delaying herbicide application to the five-to six-leaf stage in an attempt to accommodate a fungicide application reduces barley yield due to early-season weed interference.Key words: Fungicide, herbicide, timing, leaf disease, barley Turkington, T. K., O'Donovan, J. T., Harker, K. N., Xi, K., Blackshaw, R. E., Johnson, E. N., Peng, G., Kutcher, H. R., May, W. E., Lafond, G. P., Mohr, R. M., Irvine, R. B. et Stevenson, C. 2015. Impact du moment d'application des fongicides et des herbicides sur la gravite´des maladies foliaires ainsi que sur la productivite´et la qualite´de l'orge. Can. J. Plant Sci. 95: 525Á537. Les producteurs d'orge de l'Ouest canadien souhaiteraient ajouter un fongicide, a`la moitie´du taux recommande´, au moment de l'application des herbicides. De 2010 a`2012, a`six sites des Prairies canadiennes, les auteurs ont applique´des me´langes d'herbicide et du fongicide Tilt † (propiconazole) a`de l'orge parvenu au stade de la deuxie`me ou de la troisie`me feuille (fongicide a`la moitie´du taux recommande´et herbicide), a`celui de la cinquie`me ou de la sixi...

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Section: Resultsmentioning

confidence: 99%

The impact of fungicide and herbicide timing on foliar disease severity, and barley productivity and quality

et al. 2015

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“…Various statistical methods/ models (parametric and non-parametric), concepts, and definitions of stability have been described over the years by many researchers (Lin et al, 1986;Becker and Léon, 1988;Crossa et al, 1990;Lin and Binns, 1994;Hussein et al, 2000;Mohammadi and Amri, 2008;Mohammadi et al, 2010). The model used for GEI is similar to a static or biological concept of stability (Becker and Léon, 1988) and the parameters used in the study are the coefficient of determination (Ri 2 ) (Pinthus, 1973), coefficient of variability (CVi) (Francis and Kannenberg, 1978), and the genotypic variances across environments (Si 2 ) (Roemer, 1917). Similarly, another model is the dynamic or agronomic concept of stability (Becker and Léon, 1988) where the parameters used are the regression coefficient (bi) (Finlay and Wilkinson, 1963) and Shukla's stability variance (σi 2 ) (Shukla, 1972), the regression coefficient (bi), and deviation from regression (Sd i 2 ) (Eberhart and Russell, 1966;Perkins and Jinks, 1968).…”

Section: Introductionmentioning

confidence: 99%

Use of AMMI and other stability statistics in the simultaneous selection of rice genotypes for yield and stability under direct-seeded conditions

Bose

Jambhulkar

Pande

et al. 2014

Chilean J. Agric. Res.

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Rice (Oryza sativa L.) is one of the most important cereal crops in the world. India is one of the largest rice-producing countries. Although more than 900 rice varieties have been released in India, many of them are no longer cultivated within a few years of release due to inconsistent performance in diverse environments; only a few varieties with stable performance continue to be under cultivation after 15 to 20 yr of their release. Development and adaptability of rice cultivars in a wide range of target environments are the eventual goals of plant breeders. An attempt has been made to estimate the level of genotype-environment interaction (GEI) and eliminate as much as possible the unexplainable and extraneous variability contained in the data. Therefore, several statistical techniques have been used to describe GEI and measure genotype stability. Field experiments were conducted with 12 genotypes under direct-seeded conditions (irrigated and rainfed) for three consecutive years (2009 to 2012) in a randomized complete block design with three replicates. The GEI was analyzed using additive main effects and multiplicative interaction (AMMI). Results of AMMI analysis indicated that the first three AMMI (AMMI1 to AMMI3) were highly significant (P < 0.05). The partitioning of TSS (total sum of squares) exhibited that the genotype effect was a predominant source of variation followed by GEI and environment, which suggests the possible existence of different environment groups. The AMMI stability value discriminated genotypes 11 and 12 as stable genotypes based on the yield stability index (YSI) and sustainability index (SI).

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“…A grouping methodology, as previously described by Francis and Kannenberg (1978), was used to further explore treatment responses among sites. The mean and CV were estimated for each level of cultivar by Cl across sites.…”

Section: Resultsmentioning

confidence: 99%

Does the presence of the gene for glabrous hull in annual canarygrass affect the response to chloride fertilizer?

et al. 2013

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. 2013. Does the presence of the gene for glabrous hull in annual canarygrass affect the response to chloride fertilizer? Can. J. Plant Sci. 93: 109Á118. Annual canarygrass is an important cereal crop in western Canada with a unique niche market as feed for caged birds. Chloride (Cl) fertilizer has been shown to increase seed yield in annual canarygrass; however, the response was only tested in one glabrous cultivar. Currently, glabrous cultivars created through mutagenesis, are lower yielding than cultivars with trichomes on their lemma, palea and glumes. The objective of this study was to determine if the mutagenic process which created cultivars that lack trichomes on their lemma, palea and glumes also affected the response of annual canarygrass to chloride fertilizer. A two-way factorial study was conducted across 7 site-years. The first factor was Cl applied at two rates (0 and 18.2 kg Cl ha(1 ) and the second factor was four cultivars (Keet, Cantate, CDC Togo (glabrous) and CDC Bastia (glabrous). The application of Cl increased the seed yield of annual canarygrass by 25% and most of this increase was due to a 21% increase in seeds per panicle. Kernel weight also contributed to increased seed yield. Chloride did not interact with the presence or absence of trichomes and therefore growers can expect to receive a yield increase from the application of Cl regardless of the annual canarygrass cultivar grown. Growers should apply 9 kg ha(1 of Cl when growing annual canarygrass. In conclusion, Cl is not involved in the physiology of the lower yield in glabrous cultivars compared with cultivars with trichomes, and Cl could not explain the seed yield differences between the two types of annual canarygrass.Key words: Canaryseed, annual canarygrass, environmental conditions, seed yield, yield stability May, W. E., Holzapfel, C. B., Lafond, G. P. et Schoenau, J. J. 2013. La pre´sence du ge`ne de la cosse glabre chez l'alpiste roseau affecte-t-elle la re´action aux engrais contenant du chlore? Can. J. Plant Sci. 93: 109Á118. L'alpiste roseau est une importante ce´re´ale annuelle dans l'ouest du Canada. Cette culture occupe un cre´neau unique, qui est celui de la nourriture pour les oiseaux en cage. On sait que les engrais a`base de chlore (Cl) accroissent le rendement grainier de l'alpiste, cependant, cette re´action n'a e´te´teste´e que sur un cultivar glabre. Or, a`l'heure actuelle, les varie´te´s glabres, qui re´sultent de la mutage´ne`se, s'ave`rent moins productifs que les cultivars pre´sentant des trichomes sur leur lemme, leur pale´ole et leurs glumelles. L'e´tude devait e´tablir si le processus de mutage´ne`se a`l'origine des cultivars sans trichomes sur le lemme, le pale´ole et les glumelles modifie aussi la re´action de l'alpiste roseau annuel aux engrais renfermant du chlore. À cette fin, les auteurs ont proce´de´a`une expe´rience bifactorielle pendant 7 anne´es-sites. Le premier facteur consistait en deux taux d'application de l'engrais Cl (0 et 18,2 kg de Cl par hectare) et le second, en quatre cultivars [...

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Yield Stability Studies in Short-Season Maize. I. A Descriptive Method for Grouping Genotypes

Cited by 468 publications

References 9 publications

The impact of fungicide and herbicide timing on foliar disease severity, and barley productivity and quality

The impact of fungicide and herbicide timing on foliar disease severity, and barley productivity and quality

Use of AMMI and other stability statistics in the simultaneous selection of rice genotypes for yield and stability under direct-seeded conditions

Does the presence of the gene for glabrous hull in annual canarygrass affect the response to chloride fertilizer?

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