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https://www.readbyqxmd.com/read/28638401/development-of-elite-bph-resistant-wide-spectrum-restorer-lines-for-three-and-two-line-hybrid-rice
#1
Fengfeng Fan, Nengwu Li, Yunping Chen, Xingdan Liu, Heng Sun, Jie Wang, Guangcun He, Yingguo Zhu, Shaoqing Li
Hybrid rice has contributed significantly to the world food security. Breeding of elite high-yield, strong-resistant broad-spectrum restorer line is an important strategy for hybrid rice in commercial breeding programs. Here, we developed three elite brown planthopper (BPH)-resistant wide-spectrum restorer lines by pyramiding big-panicle gene Gn8.1, BPH-resistant genes Bph6 and Bph9, fertility restorer genes Rf3, Rf4, Rf5, and Rf6 through molecular marker assisted selection. Resistance analysis revealed that the newly developed restorer lines showed stronger BPH-resistance than any of the single-gene donor parent Luoyang-6 and Luoyang-9...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28636095/suppression-or-knockout-of-saf-sam-overcomes-the-sa-mediated-hybrid-male-sterility-in-rice
#2
Yongyao Xie, Baixiao Niu, Yunming Long, Gousi Li, Jintao Tang, Yaling Zhang, Ding Ren, Yao-Guang Liu, Letian Chen
Hybrids between the indica and japonica subspecies of rice (Oryza sativa) are usually sterile, which hinders utilization of heterosis in the inter-subspecific hybrid breeding. The complex locus Sa comprises two adjacently located genes, SaF and SaM, which interact to cause abortion of pollen grains carrying the japonica allele in japonica-indica hybrids. Here we showed that silencing of SaF or SaM by RNA interference restored male fertility in indica-japonica hybrids with heterozygous Sa. We further used CRISPR/Cas9-based genome editing to knockout the SaF and SaM alleles respectively of an indica rice line to create hybrid-compatible lines...
June 21, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28629493/naumannella-huperziae-sp-nov-an-endophytic-actinobacterium-isolated-from-huperzia-serrata-thunb
#3
Ye Sun, Hua-Hong Chen, Hong-Min Sun, Meng-Jie Ai, Jing Su, Li-Yan Yu, Yu-Qin Zhang
An endophytic, short rod-shaped, non-motile and non-spore-forming actinobacterium, designated strain CPCC 204135T, was isolated from a surface-sterilized medicinal plant, Huperzia serrata (Thunb.), collected from Sichuan Province, south-west China. Strain CPCC 204135T was observed to grow at temperatures between 20 and 37 °C (optimum, 28-32 °C), at pH 6.0-9.0 (optimum, pH 7.0-8.0) and in the presence of 0-9.0 % (w/v) NaCl (optimum, 0-3 %). Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain CPCC 204135T belonged to the genus Naumannella, showing the highest level of 16S rRNA gene sequence similarity with Naumannella halotolerans DSM 24323T (97...
June 20, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28629085/design-of-a-hybrid-biomaterial-for-tissue-engineering-biopolymer-scaffold-integrated-with-an-autologous-hydrogel-carrying-mesenchymal-stem-cells
#4
Caroline R Weinstein-Oppenheimer, Donald I Brown, Rodrigo Coloma, Patricio Morales, Mauricio Reyna-Jeldes, María J Díaz, Elizabeth Sánchez, Cristian A Acevedo
Biologically active biomaterials as biopolymers and hydrogels have been used in medical applications providing favorable results in tissue engineering. In this research, a wound dressing device was designed by integration of an autologous clot hydrogel carrying mesenchymal stem-cells onto a biopolymeric scaffold. This hybrid biomaterial was tested in-vitro and in-vivo, and used in a human clinical case. The biopolymeric scaffold was made with gelatin, chitosan and hyaluronic acid, using a freeze-drying method...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28607357/genome-wide-association-study-of-outcrossing-in-cytoplasmic-male-sterile-lines-of-rice
#5
Liang Guo, Fulin Qiu, Harish Gandhi, Suresh Kadaru, Erik Jon De Asis, Jieyun Zhuang, Fangming Xie
Stigma exsertion and panicle enclosure of male sterile lines are two key determinants of outcrossing in hybrid rice seed production. Based on 43,394 single nucleotide polymorphism markers, 217 cytoplasmic male sterile lines were assigned into two subpopulations and a mixed-group where the linkage disequilibrium decay distances varied from 975 to 2,690 kb. Genome-wide association studies (GWAS) were performed for stigma exsertion rate (SE), panicle enclosure rate (PE) and seed-setting rate (SSR). A total of 154 significant association signals (P < 0...
June 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28604885/developing-a-tissue-glue-by-engineering-the-adhesive-and-hemostatic-properties-of-metal-oxide-nanoparticles
#6
Martin T Matter, Fabian Starsich, Marco Galli, Markus Hilber, Andrea A Schlegel, Sergio Bertazzo, Sotiris E Pratsinis, Inge K Herrmann
Despite decades of research, wound complications remain a major cause of postoperative mortality, especially in the face of multiple comorbidities. Addressing the issue of anastomotic leakages and impaired wound healing from a new angle is of great interest with the prospect of having direct impact on patient outcome. Recently, aqueous suspensions of silica and iron oxide nanoparticles have been employed to connect biological tissue by serving as an adhesive layer eventually leading to macroscopic gluing of tissue...
June 12, 2017: Nanoscale
https://www.readbyqxmd.com/read/28604770/pervasive-antagonistic-interactions-among-hybrid-incompatibility-loci
#7
Rafael F Guerrero, Christopher D Muir, Sarah Josway, Leonie C Moyle
Species barriers, expressed as hybrid inviability and sterility, are often due to epistatic interactions between divergent loci from two lineages. Theoretical models indicate that the strength, direction, and complexity of these genetic interactions can strongly affect the expression of interspecific reproductive isolation and the rates at which new species evolve. Nonetheless, empirical analyses have not quantified the frequency with which loci are involved in interactions affecting hybrid fitness, and whether these loci predominantly interact synergistically or antagonistically, or preferentially involve loci that have strong individual effects on hybrid fitness...
June 12, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28597062/an-anther-specific-gene-phgrp-is-regulated-by-phmyc2-and-causes-male-sterility-when-overexpressed-in-petunia-anthers
#8
Yuanzheng Yue, Chaoqun Yin, Rui Guo, Hao Peng, Zhaonan Yang, Guofeng Liu, Manzhu Bao, Huirong Hu
An anther-specific GRP gene, regulated by PhMYC2 , causes a significant reduction of male fertility when overexpressed in petunia, and its promoter is efficient in genetic engineering of male-sterile lines. Glycine-rich proteins (GRPs) play important roles in plant anther development; however, the underlying mechanisms and related regulatory networks are poorly understood. In this study, a novel glycine-rich family gene designated as PhGRP was isolated from Petunia hybrida 'Fantasy Red'. The qRT-PCR analysis showed that it expressed specifically in anthers, and its expression peaked earlier than those well-known tapetum-specific genes, such as TA29, and several genes with the classic cis-regulatory element 'anther-box' in petunia during its anther development...
June 9, 2017: Plant Cell Reports
https://www.readbyqxmd.com/read/28596580/flower-induction-microscope-aided-cross-pollination-and-seed-production-in-the-duckweed-lemna-gibba-with-discovery-of-a-male-sterile-clone
#9
Lili Fu, Meng Huang, Bingying Han, Xuepiao Sun, K Sowjanya Sree, Klaus-J Appenroth, Jiaming Zhang
Duckweed species have a great potential to develop into fast-growing crops for water remediation and bioenergy production. Seed production and utilization of hybrid vigour are essential steps in this process. However, even in the extensively-studied duckweed species, Lemna gibba, flower primordia were often aborted prior to maturation. Salicylic acid (SA) and agar solidification of the medium promoted flower maturation and resulted in high flowering rates in L. gibba 7741 and 5504. Artificial cross-pollination between individuals of L...
June 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28595569/genome-wide-comparative-transcriptome-analysis-of-cms-d2-and-its-maintainer-and-restorer-lines-in-upland-cotton
#10
Jianyong Wu, Meng Zhang, Bingbing Zhang, Xuexian Zhang, Liping Guo, Tingxiang Qi, Hailin Wang, Jinfa Zhang, Chaozhu Xing
BACKGROUND: Cytoplasmic male sterility (CMS) conferred by the cytoplasm from Gossypium harknessii (D2) is an important system for hybrid seed production in Upland cotton (G. hirsutum). The male sterility of CMS-D2 (i.e., A line) can be restored to fertility by a restorer (i.e., R line) carrying the restorer gene Rf1 transferred from the D2 nuclear genome. However, the molecular mechanisms of CMS-D2 and its restoration are poorly understood. RESULTS: In this study, a genome-wide comparative transcriptome analysis was performed to identify differentially expressed genes (DEGs) in flower buds among the isogenic fertile R line and sterile A line derived from a backcross population (BC8F1) and the recurrent parent, i...
June 8, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28592669/what-shapes-the-continuum-of-reproductive-isolation-lessons-from-heliconius-butterflies
#11
C Mérot, C Salazar, R M Merrill, C D Jiggins, M Joron
The process by which species evolve can be illuminated by investigating barriers that limit gene flow between taxa. Recent radiations, such as Heliconius butterflies, offer the opportunity to compare isolation between pairs of taxa at different stages of ecological, geographical, and phylogenetic divergence. Here, we report a comparative analysis of existing and novel data in order to quantify the strength and direction of isolating barriers within a well-studied clade of Heliconius Our results highlight that increased divergence is associated with the accumulation of stronger and more numerous barriers to gene flow...
June 14, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28592558/duplication-and-loss-of-function-of-genes-encoding-rna-polymerase-iii-subunit-c4-causes-hybrid-incompatibility-in-rice
#12
Giao Ngoc Nguyen, Yoshiyuki Yamagata, Yuko Shigematsu, Miyako Watanabe, Yuta Miyazaki, Kazuyuki Doi, Kosuke Tashiro, Satoru Kuhara, Hiroyuki Kanamori, Jianzhong Wu, Takashi Matsumoto, Hideshi Yasui, Atsushi Yoshimura
Reproductive barriers are commonly observed in both animals and plants, in which they maintain species integrity and contribute to speciation. This report shows that a combination of loss-of-function alleles at two duplicated loci, DUPLICATED GAMETOPHYTIC STERILITY 1 (DGS1) on chromosome 4 and DGS2 on chromosome 7, causes pollen sterility in hybrid progeny derived from an interspecific cross between cultivated rice, Oryza sativa, and an Asian annual wild rice, Oryza nivara Male gametes carrying the DGS1 allele from O...
June 7, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/28584730/comparative-transcriptome-analysis-of-isonuclear-alloplasmic-lines-unmask-key-transcription-factor-genes-and-metabolic-pathways-involved-in-sterility-of-maize-cms-c
#13
Chuan Li, Zhuofan Zhao, Yongming Liu, Bing Liang, Shuxian Guan, Hai Lan, Jing Wang, Yanli Lu, Moju Cao
Although C-type cytoplasmic male sterility (CMS-C) is one of the most attractive tools for maize hybrid seed production, the detailed regulation network of the male sterility remains unclear. In order to identify the CMS-C sterility associated genes and/or pathways, the comparison of the transcriptomes between the CMS-C line C48-2 and its isonuclear-alloplasmic maintainer line N48-2 at pollen mother cell stage (PS), an early development stage of microspore, and mononuclear stage (MS), an abortive stage of microspore, were analyzed...
2017: PeerJ
https://www.readbyqxmd.com/read/28571580/exposure-to-trace-amounts-of-sulfonylurea-herbicide-tribenuron-methyl-causes-male-sterility-in-17-species-or-subspecies-of-cruciferous-plants
#14
Cheng-Yu Yu, Jun-Gang Dong, Sheng-Wu Hu, Ai-Xia Xu
BACKGROUND: For most cruciferous plants, which are known as important crops and a number of weeds, hybrid breeding is hampered by the unavailability of a pollination control system. Male sterility induced by a gametocide can be useful for the utilization of plant heterosis. RESULTS: The gametocidal effect of sulfonylurea herbicide tribenuron-methyl was tested across seventeen cruciferous species or subspecies including Brassica juncea, B. carinata, B. oleracea ssp...
June 1, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28551417/expression-profiles-of-a-cytoplasmic-male-sterile-line-of-gossypium-harknessii-and-its-fertility-restorer-and-maintainer-lines-revealed-by-rna-seq
#15
Zongfu Han, Yuxiang Qin, Yongsheng Deng, Fanjin Kong, Zongwen Wang, Guifang Shen, Jinghui Wang, Bing Duan, Ruzhong Li
The Gossypium harknessii background cytoplasmic male sterility (CMS) system has been used in cotton hybrid breeding in China. However, the mechanism underlying pollen abortion and fertility restoration in CMS remains to be determined. In this study, we used RNA-seq to identify critical genes and pathways associated with CMS in G. harknessii based CMS lines (588A), the near isogenic restorer lines (588R), and maintainer lines (588B). We performed an assembly of 80,811,676 raw reads into 89,939 high-quality unigenes with an average length of 698 bp...
April 20, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28528644/bypassing-negative-epistasis-on-yield-in-tomato-imposed-by-a-domestication-gene
#16
Sebastian Soyk, Zachary H Lemmon, Matan Oved, Josef Fisher, Katie L Liberatore, Soon Ju Park, Anna Goren, Ke Jiang, Alexis Ramos, Esther van der Knaap, Joyce Van Eck, Dani Zamir, Yuval Eshed, Zachary B Lippman
Selection for inflorescence architecture with improved flower production and yield is common to many domesticated crops. However, tomato inflorescences resemble wild ancestors, and breeders avoided excessive branching because of low fertility. We found branched variants carry mutations in two related transcription factors that were selected independently. One founder mutation enlarged the leaf-like organs on fruits and was selected as fruit size increased during domestication. The other mutation eliminated the flower abscission zone, providing "jointless" fruit stems that reduced fruit dropping and facilitated mechanical harvesting...
June 1, 2017: Cell
https://www.readbyqxmd.com/read/28520767/ms26-cyp704b-is-required-for-anther-and-pollen-wall-development-in-bread-wheat-triticum-aestivum-l-and-combining-mutations-in-all-three-homeologs-causes-male-sterility
#17
Manjit Singh, Manish Kumar, Katherine Thilges, Myeong-Je Cho, A Mark Cigan
Development of anthers and pollen represents an important aspect of the life cycle in flowering plants. Genes contributing to anther and pollen development have been widely studied in many plant species. Ms26/CYP704B genes play an important role in pollen development through biosynthesis of sporopollenin for pollen exine formation. To investigate the role of Ms26/CYP704B genes in anther and pollen development of bread wheat, mutations in the A-, B-, and D-homeologs of the putative Ms26/CYP704B gene were analyzed...
2017: PloS One
https://www.readbyqxmd.com/read/28492984/comparative-transcript-profiling-of-fertile-and-sterile-flower-buds-from-multiple-allele-inherited-male-sterility-in-chinese-cabbage-brassica-campestris-l-ssp-pekinensis
#18
Xue Zhou, Zhiyong Liu, Ruiqin Ji, Hui Feng
We studied the underlying causes of multiple-allele-inherited male sterility in Chinese cabbage (Brassica campestris L. ssp. pekinensis) by identifying differentially expressed genes (DEGs) related to pollen sterility between fertile and sterile flower buds. In this work, we verified the stages of sterility microscopically and then performed transcriptome analysis of mRNA isolated from fertile and sterile buds using Illumina HiSeq 2000 platform sequencing. Approximately 80% of ~229 million high-quality paired-end reads were uniquely mapped to the reference genome...
May 10, 2017: Molecular Genetics and Genomics: MGG
https://www.readbyqxmd.com/read/28492967/a-test-for-gene-flow-among-sympatric-and-allopatric-hawaiian-picture-winged-drosophila
#19
Lin Kang, Harold R Garner, Donald K Price, Pawel Michalak
The Hawaiian Drosophila are one of the most species-rich endemic groups in Hawaii and a spectacular example of adaptive radiation. Drosophila silvestris and D. heteroneura are two closely related picture-winged Drosophila species that occur sympatrically on Hawaii Island and are known to hybridize in nature, yet exhibit highly divergent behavioral and morphological traits driven largely through sexual selection. Their closest-related allopatric species, D. planitibia from Maui, exhibits hybrid male sterility and reduced behavioral reproductive isolation when crossed experimentally with D...
May 10, 2017: Journal of Molecular Evolution
https://www.readbyqxmd.com/read/28483876/reproductive-barriers-in-indica-japonica-rice-hybrids-are-uncovered-by-transcriptome-analysis
#20
Yanfen Zhu, Yiming Yu, Ke Cheng, Yidan Ouyang, Jia Wang, Liang Gong, Qinghua Zhang, Xianghua Li, Jinghua Xiao, Qifa Zhang
In rice (Oryza sativa L.), hybrids between indica and japonica subspecies are usually highly sterile, which provides a model system for studying postzygotic reproductive isolation. A killer-protector system S5 composed of three adjacent genes, ORF3, ORF4 and ORF5, regulates female gamete fertility of indica-japonica hybrids. To characterize the processes underlying this system, we performed transcriptomic analyses of pistils from rice variety Balilla (BL), Balilla with transformed ORF5+ (BL5+) producing sterile female gametes, and Balilla with transformed ORF3+ and ORF5+ (BL3+5+) producing fertile gametes...
May 8, 2017: Plant Physiology
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