Sugarcane cultivar x time of harvest interactions in South Africa

Ramburan, S.

doi:10.1080/02571862.2011.10640016

Cited by 9 publications

(15 citation statements)

References 13 publications

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“…This is in contrast to Ramburan (2011), in which it was shown that the covariates summarized within three growth phases showed diff erential associations with early and late harvests. This is in contrast to Ramburan (2011), in which it was shown that the covariates summarized within three growth phases showed diff erential associations with early and late harvests.…”

Section: Joint Interpretation Using Environmental Covariates and Genocontrasting

confidence: 68%

Integrating Empirical and Analytical Approaches to Investigate Genotype × Environment Interactions in Sugarcane

2012

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The causes of genotype × environment (G × E) interactions in sugarcane (Saccharum spp.) are unclear. The objectives of this study were to (i) investigate the G × E interactions and site similarity in two selection programs in South Africa, (ii) identify factors responsible for G × E interactions, and (iii) illustrate the integrated use of crop models and climatic data to better understand G × E interactions. Data from eight series of trials were analyzed using variance components, genotype plus genotype × environment (GGE) biplots, and additive main effects and multiplicative interaction (AMMI). Crop model simulations helped summarize environmental covariates before and after canopy closure. Environmental covariates and genotypic traits were correlated to AMMI scores and superimposed on biplots. The G × E interaction accounted for more variation than the main effect of genotype and the repeatable component of G × E was dominant across all series. Two sites were identifi ed as redundant and were recommended for removal. Sites from one program were characterized by higher rainfall and lower water stress compared with sites from the other. The enriched AMMI2 biplots allowed for identifi cation of factors that infl uenced genotypic traits and permitted biological interpretations and trait relations to be studied. This study has illustrated of harvest; TT, mean daily thermal time; TT1 and TT2, average daily heat units before and after canopy closure, respectively; WSI, water stress index; WSI1 and WSI2, water stress index before and after canopy closure, respectively.

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Section: Joint Interpretation Using Environmental Covariates and Genocontrasting

confidence: 68%

Integrating Empirical and Analytical Approaches to Investigate Genotype × Environment Interactions in Sugarcane

2012

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“…The significant variation associated with the harvest (first vs second harvests) may be partly explained by the edaphoclimatic effects associated with the harvest year, as well as by the genetic effect associated with the ratoon regrowth ability of the different genotypes. Various authors have described the existence of the interaction between harvest and genotype (HxG), even finding interactions between the time of harvest and genotypes (Gilbert et al, 2006;Zhou et al, 2011;Ramburan, 2011Ramburan, , 2014.…”

Section: Resultsmentioning

confidence: 99%

“…These changes have physiological causes and they are associated with the resilience of the genotypes. This aspect has been related in other studies (Ramburan, 2011(Ramburan, , 2014, but a more detailed description of its influence on selection has not been emphasized.…”

Section: Introductionmentioning

confidence: 99%

“…When studying the effect of the rainfall regime on the GxE interaction, Ramburan (2011) found strong environmental interaction factors . Fernandes Jr et al (2013), Guerra (2010), Rosa (2008), and Silveira et al (2012) identified interactions in sugarcane, thereby furthering the recommendation of highly responsive cultivars and reporting improvement in the yield in specific regions.…”

Section: Introductionmentioning

confidence: 99%

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Implications of the clone by harvest interaction in the selection of sugarcane genotypes in a regionalized program

et al. 2017

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ABSTRACT. The recommendation of sugarcane clones depends on several factors, as the response or performance of the clones over different cuts or harvests. The clone by harvest interaction might be difficult to identify superior clones in the final stages of the sugarcane breeding program. Thus, the objective of this study was to investigate and describe the implications of the genotype by harvest interaction in the adaptability and stability of genotypes and delineation of mega-environments from a set of multi-environment trials. Fifteen clones and four checks were evaluated in eight environments. The trait TPH (tons of pol per hectare) was evaluated in two harvests (plant cane and ratoon cane) in 2010 and 2011. The joint analysis showed significance for harvest (H), environment (E), and genotype (G) effects. The interactions GxE, ExH, GxH, and ExGxH were also significant. The last three-way interaction indicated the differential response of the genotypes over environments, and that it depends on the harvests. The overall mean of the trials was 12.77 TPH. The coefficient of variation was 8.70% and the selective accuracy was 98.63%, indicating high experimental precision. The genotypes G4, G14, and G16 were statistically superior to the check varieties used; however, these genotypes did not show high stability as described by the additive main effects and multiplicative interaction method. There was a specific adaptation between the E7 and E5 environments and the G4 and G5 genotypes, respectively. In general, the grouping of the environments was inconsistent throughout the harvests, except for the E1 and E4 environments, which exhibited similarities for the different genotypes.

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“…However, the potential impact of different growing and plant physiological conditions during maturation complicates the identification of appropriate harvest period where peak sucrose content of sugarcane can be attained [6]. Research results reported by Ramburan [7] suggested that harvest age is affected by the environment and is the one of the causes of genotype × environment interaction in sugarcane. Gilbert et al [8] reported cultivar × harvest age interactions and pointed out cultivar characterization with respect to harvest are helpful to design breeding programmes in sugarcane.…”

Section: Introductionmentioning

confidence: 99%

Maturity Classification of Sugarcane (Saccharum officinarum L) Genotypes Grown Under Different Production Environments of Ethiopia

Ftwi¹,

Mekibib²,

Tesfa³

2017

Adv Crop Sci Tech

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Sugarcane (Saccharum officinarum L.) yield productivity is potentially affected by maturity which is genotypic and environment dependent. The limited information about the effects of genotypes, maturity and climate on sugarcane yield has been the main concern in sugarcane production of Ethiopia. The objectives of this study were to characterize sugarcane production environments of Ethiopia using meteorological and maturity data, classify genotypes using maturity data collected over growing seasons and across locations (Sugar Estates) and identify the major climatic conditions affecting the variability in sugarcane maturity. The design of the experiment was simple lattice design replicated across five locations and three seasons. Recoverable sucrose percentage and Brix Data of 49 genotypes evaluated across environments were collected over crop ages and subjected to ANOVA, Principal Component Analyses (PCA) and AMMI2 analyses. Results from ANOVA revealed brix percentage measurements were highly significantly (P<0.01) affected by environment, genotype and their interaction effects. Both principal component and additive main and multiplicative interaction (AMMI2) bi-plots generated similar genotype adaptations to maturity and successfully classify the genotypes in to early, medium and late under specific environments. Most of the CIRAD advanced lines were early maturing with wide range of maturing periods while those genotypes that were introduced at mid-way selection state were medium maturity. The correlation analysis made between environmental covariates and environmental IPCA scores demonstrated mean, maximum and minimum temperature and relative humidity regimes were the major climatic conditions affecting genotype × location interactions for brix percentage within 14-16 months of crop ages while minimum relative humidity was the major environmental factor that affect maturity across locations within 10-18 months crop ages. Further applications of these techniques will involve the inclusion of covariates derived from soil, climatic and management factors over diverse regions.

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Sugarcane cultivar x time of harvest interactions in South Africa

Cited by 9 publications

References 13 publications

Integrating Empirical and Analytical Approaches to Investigate Genotype × Environment Interactions in Sugarcane

Integrating Empirical and Analytical Approaches to Investigate Genotype × Environment Interactions in Sugarcane

Implications of the clone by harvest interaction in the selection of sugarcane genotypes in a regionalized program

Maturity Classification of Sugarcane (Saccharum officinarum L) Genotypes Grown Under Different Production Environments of Ethiopia

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