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Epigenetics:Potentials and Challenges in Crop Breeding

Molecular Plant 2019年第10期12卷 1309-1311页

作者： Soodeh Tirnaz jacqueline batley School of Biological Sciences University of Western AustraliaPerthWAAustralia

The rapidly increasing global crop demand due to world population growth and changes in diet,combined with the challenges imposed on crop production due to global climate change are highlighting the urgency for improving both crop yield and *** can provide novel directions to drive plant breeding strategies and is rapidly gaining its place among modern crop breeding *** we discuss the necessity of including epigenetic diversity in crop breeding programs,as visualized in Figure 1.

关键词： breeding Figure directions

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Fertility,genome stability,and homozygosity in a diverse set of resynthesized rapeseed lines

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The Crop Journal 2023年第2期11卷 468-477页

作者： Elizabeth Ihien Katche Antje Schierholt Heiko C.Becker jacqueline batley Annaliese S.Mason Plant Breeding Department The University of Bonn53115 BonnGermany Department of Plant Breeding Justus Liebig University35392 GiessenGermany Department of Crop Sciences Division of Plant Breeding MethodologyGeorg-August University Göttingen37073 GöttingenGermany School of Biological Sciences The University of Western AustraliaPerthWA 6009Australia

Rapeseed(Brassica napus,AACC)was formed by hybridization between progenitor species Brassica rapa(AA)and Brassica oleracea(CC).As a result of a limited number of hybridization events between specific progenitor genotypes and strong breeding selection for oil quality traits,rapeseed has limited genetic *** production of resynthesized *** lines via interspecific hybridization of the diploid progenitor species *** and *** is one possible way to increase genetic variation in ***,most resynthesized lines produced so far have been reported to be meiotically unstable and infertile,in contrast to established *** *** hinders both maintenance and use of this germplasm in breeding *** characterized a large set of 140 resynthesized lines produced by crosses between *** and ***,as well as between *** and wild C genome species(***,***,***,***,*** and ***)for purity(homozygosity),fertility,and genome ***-pollinated seed set,seeds per ten pods as well as percentage pollen viability were used to estimate *** genotyping was performed using the Illumina Infinium Brassica 60K array for 116 genotypes,with at least three individuals per *** of the material which had been advanced through multiple generations was no longer pure,with heterozygosity detected corresponding to unknown parental contributions via *** and genome stability were both *** lines had high numbers of copy number variants(CNVs),indicative of meiotic instability,and high numbers of CNVs were significantly associated with reduced *** putatively stable resynthesized *** lines were *** investigation of these lines may reveal the mechanisms underlying this *** results suggest that selection of stable resynthesized lines for breeding purposes is possible.

关键词： Fertility Genome stability Copy number variants SNP genotyping Resynthesized lines

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Fertility,genome stability,and homozygosity in a diverse set of resynthesized rapeseed lines

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The Crop Journal 2023年第2期

作者： Elizabeth Ihien Katche Antje Schierholt Heiko C.Becker jacqueline batley Annaliese S.Mason

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