Endosperm tissue is crucial to seed development.Monocots and dicots have evolved different fates for their endosperm:it is usually consumed in dicots during seed development,while monocot seeds retain the endosperm un...Endosperm tissue is crucial to seed development.Monocots and dicots have evolved different fates for their endosperm:it is usually consumed in dicots during seed development,while monocot seeds retain the endosperm until maturity.Recently,Wu et al.(2022)addressed the role of divergent epigenetic regulation over the functionally conserved IKU2 gene contributing to silenced or persistent endosperm proliferation and have provided insights into divergent seed ontogeny patterns in plants.Here,we highlight the novel findings from this study and their potential significance.展开更多
Genetic diversity provides the foundation for plant breeding and genetic research.Over 3000 rice genomes were recently sequenced as part of the 3K Rice Genome(3KRG)Project.We added four additional Indian rice accessio...Genetic diversity provides the foundation for plant breeding and genetic research.Over 3000 rice genomes were recently sequenced as part of the 3K Rice Genome(3KRG)Project.We added four additional Indian rice accessions to create a panel of 3004 accessions.However,such a large collection of germplasm is difficult to preserve and evaluate.The construction of core and mini-core collections is an efficient method for the management of genetic resources.In this study,we developed a mini-core comprising 520 accessions that captured most of the SNPs and represented all of the phenotypes and geographic regions from the original panel.The mini-core was validated using different statistical analyses and contained representatives from all major rice groups,including japonica,indica,aus/boro,and aromatic/basmati.Genomewide association analyses of the mini-core panel efficiently reproduced the marker–trait associations identified in the original panel.Haplotype analysis validated the utility of the mini-core panel.In the current era with many ongoing large-scale sequencing projects,such a strategy for mini-core design should be useful in many crops.The rice mini-core collection developed in this study would be valuable for agronomic trait evaluation and useful for rice improvement via marker-assisted molecular breeding.展开更多
文摘Endosperm tissue is crucial to seed development.Monocots and dicots have evolved different fates for their endosperm:it is usually consumed in dicots during seed development,while monocot seeds retain the endosperm until maturity.Recently,Wu et al.(2022)addressed the role of divergent epigenetic regulation over the functionally conserved IKU2 gene contributing to silenced or persistent endosperm proliferation and have provided insights into divergent seed ontogeny patterns in plants.Here,we highlight the novel findings from this study and their potential significance.
基金supported by the grants BT/AB/NIPGR/SEED BIOLOGY/2012 and BT/BI/04/069/2006 for the establishment of Distrib-uted Information Sub-Centre from the Department of Biotechnology,Gov-ernment of India.
文摘Genetic diversity provides the foundation for plant breeding and genetic research.Over 3000 rice genomes were recently sequenced as part of the 3K Rice Genome(3KRG)Project.We added four additional Indian rice accessions to create a panel of 3004 accessions.However,such a large collection of germplasm is difficult to preserve and evaluate.The construction of core and mini-core collections is an efficient method for the management of genetic resources.In this study,we developed a mini-core comprising 520 accessions that captured most of the SNPs and represented all of the phenotypes and geographic regions from the original panel.The mini-core was validated using different statistical analyses and contained representatives from all major rice groups,including japonica,indica,aus/boro,and aromatic/basmati.Genomewide association analyses of the mini-core panel efficiently reproduced the marker–trait associations identified in the original panel.Haplotype analysis validated the utility of the mini-core panel.In the current era with many ongoing large-scale sequencing projects,such a strategy for mini-core design should be useful in many crops.The rice mini-core collection developed in this study would be valuable for agronomic trait evaluation and useful for rice improvement via marker-assisted molecular breeding.
