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Prediction of and for new environments: What's your model?

Molecular Plant 2022年第4期15卷 581-582页

作者： hans-peter piepho University of Hohenheim Institute of Crop ScienceBiostatistics UnitFruwirthstrasse 2370599 StuttgartGermany

Genomic prediction(GP)and genome-wide association studies(GWAS)employ genetic variants(markers)to predict phenotypic performance and identify superior *** plants,due to genotype-environment interaction(GEI),performance is usually assessed across multiple environments,giving rise to phenotypic data matrices with genotypes in rows and environments in columns(Figure 1).The standard approaches to GP and GWAS employ genotype(row)means across environments as a response and analysis focuses on the *** et al.,2022 proposed to apply the same idea using environment(column)means across genotypes as the response and scanning environmental variants for their ability to predict environmental performance.

关键词： environments Figure performance

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Heritability and Variability of Quality Parameters of Tomatoes in Outdoor Production

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Research 2020年第1期2020卷 1099-1107页

作者： Christian Zorb hans-peter piepho Sabine Zikeli Bernd Horneburg University of Hohenheim Institute of Crop Science70593 StuttgartGermany University of Kassel Section of Organic Plant Breeding and Agrobiodiversity27213 WitzenhausenGermany

The tomato is the most important vegetable *** England,outdoor tomatoes are widely grown by amateur gardeners,with the number of their allotment plots exceeding *** instance,in Germany,only about 16%of tomato plants are cultivated according to organic standards,although these rates are expected to *** for yield and fruit quality can increase resource ***,we need to evaluate the variability of yield and fruit quality parameters,to calculate the heritability of these traits and to identify superior genotypes for organic outdoor tomato production and *** these aims,we grew 24 tomato genotypes of diverse origins in a two-year field *** heritability of quality traits such as glucose,fructose,organic acid,and lycopene was *** medium heritability for yield suggests that trials with a larger number of locations are needed for the reliable selection of this *** correlations of sugar concentrations with fruit weight and of organic acid concentration with fruit weight and yield suggest trade-offs in breeding for larger fruits and higher *** for increased lycopene content is not subject to these challenges;the concentrations of the primary metabolite sugars and organic acids are positively correlated.

关键词： breeding sugar exceeding

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Selection for production-related traits in Pelargonium zonale: improved design and analysis make all the difference

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Horticulture Research 2017年第1期4卷 365-373页

作者： Heike Molenaar Martin Glawe Robert Boehm hans-peter piepho Institute of Crop Science University of HohenheimBiostatistics UnitStuttgart70599Germany Klemm+Sohn GmbH&Co.KG Stuttgart70378Germany

Ornamental plant variety improvement is limited by current phenotyping approaches and neglected use of experimental *** present study was conducted to show the benefits of using an experimental design and corresponding analysis in ornamental breeding regarding simulated response to selection in Pelargonium zonale for production-related *** required establishment of phenotyping protocols for root formation and stem cutting counts,with which 974 genotypes were assessed in a two-phase experimental *** present paper evaluates this *** possibility of varietal improvement through indirect selection on secondary traits such as branch count and flower count was assessed by genetic *** response to selection varied greatly,depending on the genotypic variances of the breeding population and traits.A varietal improvement of over 20%is possible for stem cutting count,root formation,branch count and flower *** contrast,indirect selection of stem cutting count by branch count or flower count was found to be *** established phenotypic protocols and two-phase experimental designs are valuable tools for breeding of ***.

关键词： breeding traits branch

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