The genetic diversity among 32 accessions of Hordeum bogdanii Wilensky native to Xinjiang, China, was evaluated by 22 STS_PCR primer sets derived from RFLP clones of the wheat ( Triticum aestivum L.) or barley ...The genetic diversity among 32 accessions of Hordeum bogdanii Wilensky native to Xinjiang, China, was evaluated by 22 STS_PCR primer sets derived from RFLP clones of the wheat ( Triticum aestivum L.) or barley ( Hordeum vulgare L.) mapping. Out of the 22 STS_PCR markers, only three markers gave products which did not generate polymorphic bands upon digestion with Hin fⅠ, Hha Ⅰ, Hae Ⅲ and Rsa Ⅰ, while 19 out of 22 markers (86.4%) and 46 out of 88 marker/enzyme combinations (52.3%) revealed polymorphisms. Among the 32 H. bogdanii accessions, a total of 315 bands were observed in 88 STS_PCR marker/enzyme combinations, with 3.6 bands each. One hundred and twenty_three out of 315 bands (39.0%) were polymorphic, among which 1 to 6 polymorphic bands were generated by each polymorphic marker/enzyme combination. The STS_PCR_based genetic diversity index ( GD ) among 32 H. bogdanii accessions ranged between 0.078 to 0.352, with a mean of 0.198. Based on the GD matrix, a dendrogram showing the genetic relationships between accessions was constructed using the unweighted pair_group method with arithmetic average (UPGMA). Results showed that all 32 accessions could be distinguished by STS_PCR markers. The accessions originated from the same region were distributed within different groups or subgroups. This study indicates that the genetic diversity of H. bogdanii is not closely correlated with the geographical distribution.展开更多
[Objective]The aim was to analyze genetic diversity of SSR markers in Hordeum vulgare L.in Qinghai Province and lay a foundation for screening and protecting some excellent H.vulgare cultivars.[Method]SSR markers were...[Objective]The aim was to analyze genetic diversity of SSR markers in Hordeum vulgare L.in Qinghai Province and lay a foundation for screening and protecting some excellent H.vulgare cultivars.[Method]SSR markers were used to evaluate the genetic diversity of 42 cultivated H.vulgare from Qinghai Province.[Result]42 H.vulgare showed polymorphism in 7 SSR markers locus.A total of 24 alleles were identified,and the number of alleles per locus ranged from 1 to 6,with an average of 3.0.According to SSR markers polymorphism,42 H.vulgare could be divided into 4 groups,namely I,II,III and IV.[Result]The study indicated that cultivated H.vulgare from Qinghai Province is rich in genetic diversity,which will provide reference for selecting parent of H.vulgare breeding.展开更多
Plant formation from in vitro-cultivated microspores involves a complex network of internal and environmental factors.Haploids/doubled haploids(DHs)derived from in vitro-cultured microspores are widely used in plant b...Plant formation from in vitro-cultivated microspores involves a complex network of internal and environmental factors.Haploids/doubled haploids(DHs)derived from in vitro-cultured microspores are widely used in plant breeding and genetic engineering.However,the mechanism underlying the developmental switch from regular pollen maturation towards microspore-derived plant regeneration remains poorly defined.Here,RNA-sequencing was employed to elucidate the transcriptional landscapes of four early stages of microspore embryogenesis(ME)in barley cultivars Golden Promise and Igri,which exhibit contrasting responsiveness to microspore-derived plant formation.Our experiments revealed fundamental regulatory networks,specific groups of genes,and transcription factor(TF)families potentially regulating the developmental switch.We identified a set of candidate genes crucial for genotype-dependent responsiveness/recalcitrance to ME.Our high-resolution temporal transcriptome atlas provides an important resource for future functional studies on the genetic control of microspore developmental transition.展开更多
文摘The genetic diversity among 32 accessions of Hordeum bogdanii Wilensky native to Xinjiang, China, was evaluated by 22 STS_PCR primer sets derived from RFLP clones of the wheat ( Triticum aestivum L.) or barley ( Hordeum vulgare L.) mapping. Out of the 22 STS_PCR markers, only three markers gave products which did not generate polymorphic bands upon digestion with Hin fⅠ, Hha Ⅰ, Hae Ⅲ and Rsa Ⅰ, while 19 out of 22 markers (86.4%) and 46 out of 88 marker/enzyme combinations (52.3%) revealed polymorphisms. Among the 32 H. bogdanii accessions, a total of 315 bands were observed in 88 STS_PCR marker/enzyme combinations, with 3.6 bands each. One hundred and twenty_three out of 315 bands (39.0%) were polymorphic, among which 1 to 6 polymorphic bands were generated by each polymorphic marker/enzyme combination. The STS_PCR_based genetic diversity index ( GD ) among 32 H. bogdanii accessions ranged between 0.078 to 0.352, with a mean of 0.198. Based on the GD matrix, a dendrogram showing the genetic relationships between accessions was constructed using the unweighted pair_group method with arithmetic average (UPGMA). Results showed that all 32 accessions could be distinguished by STS_PCR markers. The accessions originated from the same region were distributed within different groups or subgroups. This study indicates that the genetic diversity of H. bogdanii is not closely correlated with the geographical distribution.
基金Supported by National Science and Technology Support Projects(2007BAD64B01)~~
文摘[Objective]The aim was to analyze genetic diversity of SSR markers in Hordeum vulgare L.in Qinghai Province and lay a foundation for screening and protecting some excellent H.vulgare cultivars.[Method]SSR markers were used to evaluate the genetic diversity of 42 cultivated H.vulgare from Qinghai Province.[Result]42 H.vulgare showed polymorphism in 7 SSR markers locus.A total of 24 alleles were identified,and the number of alleles per locus ranged from 1 to 6,with an average of 3.0.According to SSR markers polymorphism,42 H.vulgare could be divided into 4 groups,namely I,II,III and IV.[Result]The study indicated that cultivated H.vulgare from Qinghai Province is rich in genetic diversity,which will provide reference for selecting parent of H.vulgare breeding.
基金funded by National Science Center in Poland Grant (2015/18/M/NZ3/00348) to Iwona·Zursupported by Czech Science Foundation Grant (21-02929S) to Ales Pecinka+2 种基金European Regional Development Fund project TANGENC (CZ.02.01.01/00/ 22_008/0004581)funded by Ad Agri F (CZ.02.01.01/00/22_008/0004635)supplied by the project “e-Infrastruktura CZ” (e-INFRA CZ LM2018140) supported by the Ministry of Education, Youth and Sports of the Czech Republic
文摘Plant formation from in vitro-cultivated microspores involves a complex network of internal and environmental factors.Haploids/doubled haploids(DHs)derived from in vitro-cultured microspores are widely used in plant breeding and genetic engineering.However,the mechanism underlying the developmental switch from regular pollen maturation towards microspore-derived plant regeneration remains poorly defined.Here,RNA-sequencing was employed to elucidate the transcriptional landscapes of four early stages of microspore embryogenesis(ME)in barley cultivars Golden Promise and Igri,which exhibit contrasting responsiveness to microspore-derived plant formation.Our experiments revealed fundamental regulatory networks,specific groups of genes,and transcription factor(TF)families potentially regulating the developmental switch.We identified a set of candidate genes crucial for genotype-dependent responsiveness/recalcitrance to ME.Our high-resolution temporal transcriptome atlas provides an important resource for future functional studies on the genetic control of microspore developmental transition.