Juglandaceae species are plants of great economic value and have been cultivated,domesticated,and utilized by human society for a long time.Their edible,nutrient-rich nuts and tough,durable wood have attracted the att...Juglandaceae species are plants of great economic value and have been cultivated,domesticated,and utilized by human society for a long time.Their edible,nutrient-rich nuts and tough,durable wood have attracted the attention of botanists and breeders.With the advent of the genomics era,genome sequencing of the Juglandaceae family has been greatly accelerated,and a large amount of data has been generated.In this paper,we introduce the Portal of Juglandaceae(PJU),a tool to bring all these data together.The PJU contains genomes,gene-coding sequences,protein sequences,various types of annotation information,expression data,and miRNA data,which are configured with BLAST,JBrowse,and our self-developed synteny analysis tool.The PJU has a user-friendly and straightforward interface that performs a variety of query tasks with a few simple operations.In the future,we hope that the PJU will serve as a hub for the study of the Juglandaceae family.展开更多
In eukaryotes, crossovers together with sister chromatid cohesion maintain physical association between homologous chromosomes, ensuring accurate chromosome segregation during meiosis I and resulting in exchange of ge...In eukaryotes, crossovers together with sister chromatid cohesion maintain physical association between homologous chromosomes, ensuring accurate chromosome segregation during meiosis I and resulting in exchange of genetic information between homologues. The Arabidopsis PTD （Parting Dancers） gene affects the level of meiotic crossover formation, but its functional relationships with other core meiotic genes, such as AtSP011-1, AtRAD51, and AtMSH4, are unclear; whether PTD has other functions in meiosis is also unknown. To further analyze PTD function and to test for epistatic relationships, we compared the meiotic chromosome behaviors ofAtspoll-1 ptd and Atrad51 ptd double mutants with the relevant single mutants. The results suggest that PTD functions downstream of AtSP011-1 and AtRAD51 in the meiotic recombination pathway. Furthermore, we found that meiotic defects in rck pM and Atmsh4 ptd double mutants showed similar meiotic phenotypes to those of the relevant single mutants, providing genetic evidences for roles of PTD and RCK in the type I crossovers pathway. Moreover, we employed a pollen tetrad-based fluorescence method and found that the meiotic crossover frequencies in two genetic intervals were significantly reduced from 6.63% and 22.26% in wild-type to 1.14% and 6.36%, respectively, in the ptd^2 mutant. These results revealed new aspects of PTD function in meiotic crossover formation.展开更多
基金supported by grants from the National Natural Science Foundation of China(31570666)Major Science and Technology Projects of Zhejiang Province(2018C02004)+1 种基金Major Scientific and Technological Projects for the Selection of New Varieties of Agriculture in Zhejiang Province(2016C02052-13)National Key R&D Program of China(2018YFD1000604).
文摘Juglandaceae species are plants of great economic value and have been cultivated,domesticated,and utilized by human society for a long time.Their edible,nutrient-rich nuts and tough,durable wood have attracted the attention of botanists and breeders.With the advent of the genomics era,genome sequencing of the Juglandaceae family has been greatly accelerated,and a large amount of data has been generated.In this paper,we introduce the Portal of Juglandaceae(PJU),a tool to bring all these data together.The PJU contains genomes,gene-coding sequences,protein sequences,various types of annotation information,expression data,and miRNA data,which are configured with BLAST,JBrowse,and our self-developed synteny analysis tool.The PJU has a user-friendly and straightforward interface that performs a variety of query tasks with a few simple operations.In the future,we hope that the PJU will serve as a hub for the study of the Juglandaceae family.
基金supported by funds from Fudan Universityfunds from Rijk Zwaan,the Netherlands,and the Biology Department and the Huck Institutes of the Life Sciences at the Pennsylvania State University in USA
文摘In eukaryotes, crossovers together with sister chromatid cohesion maintain physical association between homologous chromosomes, ensuring accurate chromosome segregation during meiosis I and resulting in exchange of genetic information between homologues. The Arabidopsis PTD （Parting Dancers） gene affects the level of meiotic crossover formation, but its functional relationships with other core meiotic genes, such as AtSP011-1, AtRAD51, and AtMSH4, are unclear; whether PTD has other functions in meiosis is also unknown. To further analyze PTD function and to test for epistatic relationships, we compared the meiotic chromosome behaviors ofAtspoll-1 ptd and Atrad51 ptd double mutants with the relevant single mutants. The results suggest that PTD functions downstream of AtSP011-1 and AtRAD51 in the meiotic recombination pathway. Furthermore, we found that meiotic defects in rck pM and Atmsh4 ptd double mutants showed similar meiotic phenotypes to those of the relevant single mutants, providing genetic evidences for roles of PTD and RCK in the type I crossovers pathway. Moreover, we employed a pollen tetrad-based fluorescence method and found that the meiotic crossover frequencies in two genetic intervals were significantly reduced from 6.63% and 22.26% in wild-type to 1.14% and 6.36%, respectively, in the ptd^2 mutant. These results revealed new aspects of PTD function in meiotic crossover formation.
