Genotype × environment interactions in sugarcane. I. Patterns of response across sites and crop-years in north Queensland

1992 ◽  
Vol 43 (7) ◽  
pp. 1447 ◽  
Author(s):  
PA Jackson ◽  
DM Hogarth
Keyword(s):  
Cluster Analysis ◽  
Pattern Analysis ◽  
Sugar Content ◽  
Cane Yield ◽  
Selection Methods ◽  
Ratoon Crop ◽  
Breeding Programs ◽  
Sugarcane Breeding ◽  
General Response ◽  
Efficient Selection

Responses of sugarcane genotypes across environments in north Queensland for sugar yield and its components cane yield and sugar content, were examined using pattern analysis methods. The aim was to provide information which could be used in designing efficient selection methods for sugarcane breeding programs. Of particular interest was the comparison of variation in relative performance of genotypes across sites and crop-years. Results from two series of sugarcane trials in north Queensland are presented. In the first series, 65 genotypes were evaluated at four sites and across plant, first ratoon and second ratoon crops. In the second, 52 genotypes were evaluated across four sites and across plant and first ratoon crops. Crops and years were confounded in both series. Crop-years within sites were generally more similar for genotypic responses than environments from different sites. Within most sites the relative ranking of groups of genotypes derived from cluster analysis was similar across different crop-years. However, there were some substantial differences in ranking of the groups between some sites and selection would vary if different subsets of sites were considered. There was little variation among groups in general response to ratoon crop-years. The results indicate that testing across sites is of importance. However, the similarity in information obtained across crop-years within most sites suggests there may be limited gain in testing across multiple crops or years within a particular site.

Early stage selection for commercial cane sugar (CCS) in sugarcane clones: effects of time of sampling and irrigation

2003 ◽  
Vol 54 (4) ◽  
pp. 389 ◽  
Author(s):  
Phillip A. Jackson ◽  
Terry E. Morgan
Keyword(s):  
Field Experiments ◽  
Clonal Selection ◽  
Early Stage ◽  
Sugar Content ◽  
Selection Criterion ◽  
Cane Yield ◽  
Physiological Basis ◽  
Breeding Programs ◽  
Sugarcane Breeding ◽  
Selection For

Commercially recoverable sugar content in sugarcane (CCS, expressed as a percentage) is a key selection criterion in sugarcane breeding programs. In some sugarcane breeding programs there may be significant operational advantages in measuring CCS early in the crop growth cycle, well before commercial harvesting would normally commence, and in restricting growth by withholding irrigation to reduce cane yield and lodging. Two field experiments were conducted to investigate these effects. The experiments included clones representative of genotypes routinely assessed in the earliest stages of clonal selection in breeding programs. Differences among genotypes for CCS were expressed early when cane had very low CCS (in February or March), and then rates of increase in CCS following that time were similar in most genotypes. Therefore, time of sampling had little effect on ranking of genotypes for CCS, and selection for high CCS could be effective early in the year. Irrigation regime also had little effect on ranking of the clones for CCS, indicating that mild water stress could be imposed with no adverse effect on selection results. The results are discussed in relation to optimising selection procedures and systems in early stage selection trials in sugarcane breeding programs, and better understanding the physiological basis of genetic variation in CCS.

Application of spatial analysis techniques to adjust for fertility trends and identify interplot competition in early stage sugarcane selection trials

2002 ◽  
Vol 53 (8) ◽  
pp. 911 ◽  
Author(s):  
J. K. Stringer ◽  
B. R. Cullis
Keyword(s):  
Spatial Analysis ◽  
Early Stage ◽  
Sugar Content ◽  
Current Method ◽  
Cane Yield ◽  
Field Variation ◽  
Breeding Programs ◽  
Fertility Trends ◽  
Accuracy And Precision ◽  
Modelling Approach

Most sugarcane breeding programs in Australia use large unreplicated trials to evaluate clones in the early stages of selection. Commercial varieties that are replicated provide a method of local control of soil fertility. Although such methods may be useful in detecting broad trends in the field, variation often occurs on a much smaller scale. Methods such as spatial analysis adjust a plot for variability by using information from immediate neighbours. These techniques are routinely used to analyse cereal data in Australia and have resulted in increased accuracy and precision in the estimates of variety effects. In this paper, spatial analyses in which the variability is decomposed into local, natural, and extraneous components are applied to early selection trials in sugarcane. Interplot competition in cane yield and trend in sugar content were substantial in many of the trials and there were often large differences in the selections between the spatial and current method used by the Bureau of Sugar Experiment Stations. A joint modelling approach for tonnes sugar per hectare in response to fertility trends and interplot competition is recommended.

Genotype×environment interactions in sugarcane between China and Australia

2012 ◽  
Vol 63 (5) ◽  
pp. 459 ◽  
Author(s):  
Xuekuan Chen ◽  
Phillip Jackson ◽  
Wankuan Shen ◽  
Haihua Deng ◽  
Yuanhong Fan ◽  
...  
Keyword(s):  
Genetic Correlation ◽  
Environmental Conditions ◽  
Sugar Content ◽  
Crop Management ◽  
Commercial Production ◽  
Trial Data ◽  
Cane Yield ◽  
Breeding Programs ◽  
Production Environments

Sugarcane improvement has traditionally been conducted by nationally focussed breeding programs, with some exchange of elite cultivars among some programs. It has been generally assumed by breeders that genotype × country interactions are large, and therefore selection trial data in one country may be of limited relevance to another. However, no studies quantifying clone × country interactions have been reported to our knowledge. In research reported here, a common set of mostly unselected sugarcane genotypes was evaluated in commercial production environments in Australia and China. Consistent with past studies, genotype × site interaction was an important source of variation within each country. Overall a moderate to high genetic correlation existed between production environments in China and Australia for cane yield and sugar content (0.77 for both traits). This suggests that despite difference in environmental conditions and crop management in production environments between countries, that selection trials in China have some relevance for selecting clones for Australian environments and vice versa. It also supports the hypothesis that regular exchange of selected germplasm from effective breeding programs between countries will have mutual benefits.

scholarly journals Cultivar Evaluation and Essential Test Locations Identification for Sugarcane Breeding in China

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Jun Luo ◽  
Yong-Bao Pan ◽  
Liping Xu ◽  
Hua Zhang ◽  
Zhaonian Yuan ◽  
...  
Keyword(s):  
Sugar Content ◽  
Sugar Yield ◽  
The Other ◽  
Cane Yield ◽  
Environment Interaction ◽  
Discrimination Ability ◽  
Sugarcane Breeding ◽  
High Sugar ◽  
Genotype Environment Interaction ◽  
Poor Stability

The discrepancies across test sites and years, along with the interaction between cultivar and environment, make it difficult to accurately evaluate the differences of the sugarcane cultivars. Using a genotype main effect plus genotype-environment interaction (GGE) Biplot software, the yield performance data of seven sugarcane cultivars in the 8th Chinese National Sugarcane Regional Tests were analyzed to identify cultivars recommended for commercial release. Fn38 produced a high and stable sugar yield. Gn02-70 had the lowest cane yield with high stability. Yz06-407 was a high cane yield cultivar with poor stability in sugar yield. Yz05-51 and Lc03-1137 had an unstable cane yield but relatively high sugar yield. Fn39 produced stable high sugar yield with low and unstable cane production. Significantly different sugar and cane yields were observed across seasons due to strong cultivar-environment interactions. Three areas, Guangxi Chongzuo, Guangxi Baise, and Guangxi Hechi, showed better representativeness of cane yield and sugar content than the other four areas. On the other hand, the areas Guangxi Chongzuo, Yunnan Lincang, and Yunnan Baoshan showed strong discrimination ability, while the areas Guangxi Hechi and Guangxi Liuzhou showed poor discrimination ability. This study provides a reference for cultivar evaluation and essential test locations identification for sugarcane breeding in China.

Genotype × environment interactions in sugarcane. II. Use of performance in plant cane as an indirect selection criterion for performance in ratoon crops

1992 ◽  
Vol 43 (7) ◽  
pp. 1461 ◽  
Author(s):  
PA Jackson
Keyword(s):  
Genetic Correlations ◽  
Selection Criterion ◽  
Relative Yield ◽  
Indirect Selection ◽  
Sugar Yield ◽  
Ratoon Crop ◽  
Breeding Programs ◽  
Sugarcane Breeding ◽  
Efficiency Of Selection ◽  
Plant Crop

This study aimed to determine whether sugar yield of sugarcane genotypes in the plant crop could be used to predict relative yield in subsequent ratoon crops. Results from two series of trials, planted in 1985 and 1986, were examined. Within each series genotypes were planted at four locations and evaluated in plant, first ratoon and second ratoon crops. The genotypes used had not been selected previously in the test environments. Genetic correlations between sugar yield in plant and ratoon crop-years were moderate to high (greater than 0.65) for most locations. The relative efficiency of selection for yield in ratoon crop-years via indirect selection in the plant crop-year averaged 0.67. Realized gains from selection were compared for selection based on only plant crop results and selection based on average performance across all crop-years (the latter being the method routinely used in sugarcane breeding programs at present). In most cases the increases in realized gains in yield across independent environments brought about by considering results from more than the plant crop-year were small or non-existent. In the two series of trials, 11 and 12 of the top ranking 15 genotypes, respectively, based on mean performance across all crop-years, were also in the top 15 genotypes based on only the plant crop results. It is suggested that the testing of genotypes in only the plant crop may be appropriate in the early stages of selection in sugarcane breeding programs. Resources otherwise allocated to testing early stage material in ratoon crops may be more usefully employed elsewhere such as testing in more sites, with more replicates or more genotypes. It is emphasized, however, that this strategy may not be appropriate for highly selected populations, such as those in the final stages of selection, where genetic variance and genetic correlations between crop-years would be expected to be smaller than those obtained in this study.

scholarly journals Effect of Planting Material Type on Experimental Trial Quality and Performance Ranking of Sugarcane Genotypes

2018 ◽  
Vol 2018 ◽  
pp. 1-8
Author(s):  
Michel Choairy de Moraes ◽  
Ana Carolina Ribeiro Guimarães ◽  
Dilermando Perecin ◽  
Manuel Benito Sainz
Keyword(s):  
Sugar Content ◽  
Breeding Program ◽  
Cane Yield ◽  
Multiplication Rate ◽  
Sugarcane Breeding ◽  
Material Type ◽  
Trial Quality ◽  
Planting Material ◽  
Planting Materials ◽  
Performance Ranking

In recent years, the use of presprouted setts (MPB, which stands for “mudas pre-brotadas” in Portuguese) to establish commercial sugarcane nurseries has grown in Brazil. MPB and single-bud setts (SBS) have the advantage of requiring less planting material and enabling a higher multiplication rate of the source material as compared with the conventional multibud sett (MBS) planting system. Sugarcane breeding programs could also potentially benefit from the precise spacing afforded by MPB or SBS planting materials, by reducing trial variability. However, the effect of planting material type on the performance ranking and consequent selection of sugarcane clones in a breeding program has not been previously investigated. We present results on possible interactions between genotype and the type of planting material (MPB, MBS, or SBS) on key performance parameters, like sugar content, cane yield, and sugar yield, in the context of the intermediate phase of a sugarcane breeding program. Our results indicate that trial quality does not necessarily improve with the use of MPB or SBS planting materials and that type of planting material has a significant effect on the ranking of sugarcane genotypes, and this needs to be taken into consideration when considering the use of new planting technologies in breeding trials of vegetatively propagated crops such as sugarcane.

scholarly journals Sugarcane Breeding for Enhanced Fiber and Its Impacts on Industrial Processes

2021 ◽  
Author(s):  
Pietro Sica
Keyword(s):  
Biomass Production ◽  
Biomass Yield ◽  
New Technologies ◽  
New Technology ◽  
Sugar Content ◽  
Fiber Content ◽  
Breeding Programs ◽  
Energy Cane ◽  
Sugarcane Breeding ◽  
Brazilian Government

For centuries, sugar has been virtually the only commercialized product derived from sugarcane. Traditionally, sugarcane breeding programs focused exclusively on the increase of the sucrose content, abandoning characteristics such as biomass yield and fiber content. Recently, sugarcane gained prominence also for its potential in terms of biomass production. As a result, some sugarcane breeding programs began to look for ways to increase fiber content and biomass yield instead of sugar content. In the 1980s, Alexander created the concept of energy cane. Here we review the changes in the sugarcane breeding programs related to enhanced fiber instead of sugar content. Compare the energy generation of energy cane with other biomass crops. Also, the recent changes in the biomass and biofuels scenario, focusing on topics as 2G ethanol and the RenovaBio program, from the Brazilian Government, which will give carbon credits to biofuels. Although several studies demonstrate its potential for biomass production, energy cane is still a new technology on an experimental scale and has been struggling to reach and establish on a commercial scale. However, policies and new technologies are increasing the demand for lignocellulosic material. Therefore, this chapter connects these points and shows the potential of this new plant material for the coming years.

scholarly journals Prediction of Ratoon Sugarcane Family Yield and Selection Using Remote Imagery

Agronomy ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1273
Author(s):  
James Todd ◽  
Richard Johnson
Keyword(s):  
Remote Sensing ◽  
Regression Model ◽  
Block Design ◽  
Color Space ◽  
Multiple Linear Regression Model ◽  
Cane Yield ◽  
Unmanned Aerial Systems ◽  
Family Selection ◽  
Ratoon Crop ◽  
Color Indices

Remote sensing techniques and the use of Unmanned Aerial Systems (UAS) have simplified the estimation of yield and plant health in many crops. Family selection in sugarcane breeding programs relies on weighed plots at harvest, which is a labor-intensive process. In this study, we utilized UAS-based remote sensing imagery of plant-cane and first ratoon crops to estimate family yields for a second ratoon crop. Multiple families from the commercial breeding program were planted in a randomized complete block design by family. Standard red, green, and blue imagery was acquired with a commercially available UAS equipped with a Red–Green–Blue (RGB) camera. Color indices using the CIELab color space model were estimated from the imagery for each plot. The cane was mechanically harvested with a sugarcane combine harvester and plot weights were obtained (kg) with a field wagon equipped with load cells. Stepwise regression, correlations, and variance inflation factors were used to identify the best multiple linear regression model to estimate the second ratoon cane yield (kg). A multiple regression model, which included family, and five different color indices produced a significant R2 of 0.88. This indicates that it is possible to make family selection predictions of cane weight without collecting plot weights. The adoption of this technology has the potential to decrease labor requirements and increase breeding efficiency.

ADDITIONAL CRITERIA FOR SELECTION OF MALTING QUALITY IN BARLEY BREEDING

1976 ◽  
Vol 56 (4) ◽  
pp. 805-809 ◽  
Author(s):  
V. M. BENDELOW
Keyword(s):  
Specific Gravity ◽  
Filtration Rate ◽  
Sugar Content ◽  
Reducing Sugar ◽  
Malting Quality ◽  
Breeding Programs ◽  
Barley Breeding ◽  
Sample Extraction ◽  
Criteria For Selection ◽  
Selection Of

A procedure that provides information on the suitability of barley for malting and, brewing purposes is described. Three parameters are measured: mash filtration rate, wort viscosity and wort-reducing sugar content, as maltose. Maltose is determined by an auto-analyzer method and this is a satisfactory alternative to the specific gravity procedure for the estimation of percent extract. The addition of these criteria to those already in use enables more discriminatory selection at early generations of barley-breeding programs. The technique requires only one sample extraction and 18 g of laboratory malt.

Sign in / Sign up

Export Citation Format

Share Document