Analysis of multienvironment trials (MET) in the sugarcane breeding program of Réunion Island

Guilly, Susie; Dumont, Thomas; Thong-Chane, Audrey; Barau, Laurent; Hoarau, Jean-Yves

doi:10.1007/s10681-017-1994-1

Cited by 27 publications

(27 citation statements)

References 16 publications

(20 reference statements)

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“…The four programmes are located in La Mare (LM), Saint-Benoit (SB), Etang-Salé (ES) and Vue-Belle (VB) stations on Réunion Island in contrasted environments representative of the four major cultivation areas of sugarcane. Our previous paper (Guilly et al 2017) gives detailed information on their respective locations, climate characteristics and soil types in terms of physical properties and chemical fertility. Briefly summarized, the sites of LM and SB are located on the wet windward coast of the island in its North and East regions, respectively; while the sites of VB and ES are located on the dry leeward coast of the island in its West and South regions, respectively.…”

Section: Experimental Sitesmentioning

confidence: 99%

“…eRcane research institute which is responsible for the Sugarcane Variety Development Programme (SVDP) of Réunion Island currently operates seven decentralized concurrent selection programmes located in seven major growing areas (Guilly et al 2017). The programme currently takes 14 years from the initial cross to the release of a new R-cultivar.…”

Section: Introductionmentioning

confidence: 99%

“…The different materials tested in these regional programmes undergo, in parallel, the same sequential process of selection during four successive stages of selection (stages I-IV) that last a total of 10 years (Table 1). Highly significant genotype-by-environment interactions exist among the seven sites of selection for cane yield (CY) and estimable recoverable sugar (ERS), fibre content (FIB) and the derived economic index (EI) (Guilly et al 2017). The establishment of these decentralized concurrent selection programmes was motivated by a strategy based on an early selection pressure for local adaptation.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Genetic Variabilities and Genetic Gains for Yield Components in Regional Sugarcane Breeding Programmes on Réunion Island

Dumont¹,

Thong-Chane²,

Barau³

et al. 2019

Sugar Tech

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Sugarcane variety development programmes are costly and lengthy. It appears important to periodically assess their ability to select competitive genotypes for yield components and provide genetic gains. This article reports a 10-year retrospective analysis of successive variety trials conducted in four regional breeding programmes on Réunion Island in the most advanced regional selection stage. The four variety programmes were dedicated to the humid coastal zone (LM), the per-humid coastal zone (SB), the irrigated dry coastal zone (ES) and the dry high lands (VB) of the local industry. Using mixed linear models, the objective of the study was to (1) assess genetic variabilities available for yield components in this advanced selection stage; and (2) estimate trends of genetic gains achieved over the last decade across the four programmes. Yield components were: cane yield (CY), estimable recoverable sugar (ERS), fibre content (FIB) and economic index (EI). Broad-sense heritabilities were high (0.70-0.91) for all traits in each programme. Mean genetic coefficients of variation were about twice as high for CY (14.1%) and EI (15.5%) compared to ERS (5.7%) and FIB (6.6%). A higher probability of identifying superior varieties was found for CY and EI in two of the four programmes characterized either by thermal and hydric stresses (VB) or by an edaphic stress (SB). Simple linear regression of variety performances versus years of selection revealed trends in genetic gains for EI ranging between 0.53 and 1.81% increase per year that were highly significant (P \ 0.001) in the two programmes (LM and VB).

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Section: Experimental Sitesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Genetic Variabilities and Genetic Gains for Yield Components in Regional Sugarcane Breeding Programmes on Réunion Island

Dumont¹,

Thong-Chane²,

Barau³

et al. 2019

Sugar Tech

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“…However, the breeding process is expensive and requires approximately 15 years of experimentation and selection to obtain one or a few cultivars. Briefly, every year, crosses between accessions generate hundreds of thousands of F1 progenies, and the individuals reaching the final stages of selection are commonly evaluated over several harvests in multienvironment trials (METs) to identify those with the potential to become new cultivars [10–13]. Even with the adoption of better agricultural practices and selection strategies in the early stages of breeding programs, which attempt to measure and isolate the environmental effects of genetic factors [13–16], the genetic gains to quantitative traits have declined in recent years for sugarcane and other crops [17–19].…”

Section: Introductionmentioning

confidence: 99%

A genome-wide association study identified loci for yield component traits in sugarcane (Saccharum spp.)

et al. 2019

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Sugarcane ( Saccharum spp.) has a complex genome with variable ploidy and frequent aneuploidy, which hampers the understanding of phenotype and genotype relations. Despite this complexity, genome-wide association studies (GWAS) may be used to identify favorable alleles for target traits in core collections and then assist breeders in better managing crosses and selecting superior genotypes in breeding populations. Therefore, in the present study, we used a diversity panel of sugarcane, called the Brazilian Panel of Sugarcane Genotypes (BPSG), with the following objectives: (i) estimate, through a mixed model, the adjusted means and genetic parameters of the five yield traits evaluated over two harvest years; (ii) detect population structure, linkage disequilibrium (LD) and genetic diversity using simple sequence repeat (SSR) markers; (iii) perform GWAS analysis to identify marker-trait associations (MTAs); and iv) annotate the sequences giving rise to SSR markers that had fragments associated with target traits to search for putative candidate genes. The phenotypic data analysis showed that the broad-sense heritability values were above 0.48 and 0.49 for the first and second harvests, respectively. The set of 100 SSR markers produced 1,483 fragments, of which 99.5% were polymorphic. These SSR fragments were useful to estimate the most likely number of subpopulations, found to be four, and the LD in BPSG, which was stronger in the first 15 cM and present to a large extension (65 cM). Genetic diversity analysis showed that, in general, the clustering of accessions within the subpopulations was in accordance with the pedigree information. GWAS performed through a multilocus mixed model revealed 23 MTAs, six, three, seven, four and three for soluble solid content, stalk height, stalk number, stalk weight and cane yield traits, respectively. These MTAs may be validated in other populations to support sugarcane breeding programs with introgression of favorable alleles and marker-assisted selection.

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“…La canne à sucre (Saccharum officinarum L. ; Poaceae) est la principale source de production mondiale de sucre (Guilly et al, 2017). Elle fournit les deux-tiers de cette production, très loin devant la betterave (Beta vulgaris L. ; Amaranthaceae) qui n'en produit que le tiers (Soti et al, 2018).…”

Section: Introductionunclassified

Effet de Garcinia kola (Clusiaceae) dans les processus de fermentation du vin de canne à sucre (Saccharum officinarum; Poaceae) au Gabon

Lepengué¹,

Mokea-Niaty²,

Ikabanga³

et al. 2020

Int. J. Bio. Chem. Sci

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Le nectar de canne à sucre (Saccharum officinarum L.) est utilisé au Gabon non seulement pour la fabrication du sucre industriel, mais également pour la synthèse traditionnelle de vins locaux appelés ‘‘Musungu’’ ou ‘‘Malamba’’. Ces synthèses alcooliques nécessitent l’emploi de nombreux adjuvants dont le rôle exact reste mal défini. Le présent travail a été initié pour étudier l’un d’eux, le bois amer (Garcinia kola) utilisé dans diverses synthèses alcooliques. La méthodologie a consisté à analyser l’évolution de certaines qualités physicochimiques et biochimiques de 1 l des nectars de canne à sucre seuls (témoin), associés à la lie d’anciens vins de canne (Li), au bois amer (Gk) ou à ces 2 amendements (LG), avant et après 4 semaines de fermentation. Les résultats obtenus ont révélé la baisse de l’acidité, de la densité et des sucres totaux dans tous les traitements essais, contrairement aux témoins, après les 28 jours d’incubation. Tous les traitements (essais et témoins) ont en revanche produit des alcools de fortes teneurs comprises entre 7,4 °GL et 9,9 °GL. Mais les vins des traitements témoins quoique très alcoolisés ont tous été jugés aigres et de très mauvaise qualité gustative. Le bois amer ne paraît donc pas intervenir dans les processus de fermentation alcoolique, mais dans la constitution des qualités organoleptiques, en empêchant la prolifération des germes lactiques. Ainsi, dans la perspective d’optimiser la qualité du vin, identifier les germes participants à la fermentation du nectar de canne, sous l’influence de Garcia kola semble être nécessaire.Mots clés : Nectar, Levures, Adjuvants, Alcool, Qualité organoleptique. English Title: Effect of Garcinia kola (Clusiaceae) in the fermentation processes of sugar cane wine (Saccharum officinarum ; Poaceae) in Gabon Sugarcane nectar (Saccharum officinarum L.) is used in Gabon not only for the production of industrial sugar, but also for the traditional synthesis of local wines called ''Musungu'' or ''Malamba''. These alcoholic syntheses require the use of many adjuvants whose exact role remains poorly defined. The present work was undertaken to study one of them, the bitter wood (Garcinia kola) used in various alcoholic syntheses. The methodology consisted of analyzing the evolution of certain of physicochemical and biochemical qualities of 1 l of sugar cane nectars alone (control), associated with the lees of old cane wines (Li), bitter wood (Gk) or 2 amendments (LG), before and after 4 weeks of fermentation. The results obtained revealed the decrease of the acidity, the density and the total sugars in all the treatments tests, contrary to the controls, after the 28 days of incubation. On the other hand, all the treatments (tests and controls) produced alcohols with high contents of between 7.4 °GL and 9.9 °GL. But the wines of the control treatments, although very alcoholic, have all been judged as sour and of very poor taste quality. Bitter wood therefore does not appear to be involved in the processes of alcoholic fermentation, but in the constitution of organoleptic qualities, by preventing the proliferation of lactic acid bacteria. Thus, in order to optimize the quality of the wine, identifying the germs involved in the fermentation of cane nectar, under the influence of Garcia kola seems to be necessary.Keywords: Nectar, Yeasts, Additive, Alcohol, Organoleptic quality.

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Analysis of multienvironment trials (MET) in the sugarcane breeding program of Réunion Island

Cited by 27 publications

References 16 publications

Genetic Variabilities and Genetic Gains for Yield Components in Regional Sugarcane Breeding Programmes on Réunion Island

Genetic Variabilities and Genetic Gains for Yield Components in Regional Sugarcane Breeding Programmes on Réunion Island

A genome-wide association study identified loci for yield component traits in sugarcane (Saccharum spp.)

Effet de <i>Garcinia kola</i> (Clusiaceae) dans les processus de fermentation du vin de canne à sucre (<i>Saccharum officinarum</i>; Poaceae) au Gabon

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