【摘 要】
：
An awned rice(Oryza sativa)plant carrying an extra chromosome was discovered among the progenies of triploid Zhongxian 3037 plants.The transmission frequency of the extra chromosome to the next genera
【机 构】
：
Ministry of Education Key Laboratory of Agriculture Biodiversity for Plant Disease Management,Yunnan
论文部分内容阅读
An awned rice(Oryza sativa)plant carrying an extra chromosome was discovered among the progenies of triploid Zhongxian 3037 plants.The transmission frequency of the extra chromosome to the next generation was unstable,and the effect of an extra chromosome on plant traits was cumulative.Fluorescence in situ hybridization revealed that this extra chromosome was a ring chromosome derived from the long arm of chromosome 4,and only the centromeric probe Centromeric Retrotransposon of Rice(CRR)co-localized with the centromere-specific histone CENH3.The extra ring chromosome exhibited a unique segregation pattern during meiosis,including no pairing between the ring chromosome and normal chromosome 4 at pachytene and preseparation of sister chromatids during meiosis I.These finding suggest that the lack of chiasmata in univalent ring chromosomes promotes bi-orientation and pre-segregation of sister chromatids during meiosis I.
其他文献
Thromboangiitis obliterans (TAO) is a chronic nonatherosclerotic segmental occlusive vasculitis with arterial lumen thrombosis, which most commonly involves the small-and medium-sized arteries and vei
In vertebratedefinitive hematopoiesis, nascent hematopoietic stem/progenitor cells(HSPCs) migrate to and reside in proliferative hematopoietic microenvironment for transitory expansion.
Cell growth is tightly coupled with mitochondrial biogenesis in order to maintain energy and organelle homeostasis.Receptor tyrosine kinase Kit and its ligand, stem cell factor (SCF), play a critical
目的：七十味珍珠丸对局灶性大鼠脑缺血再灌注模型脑组织中超氧化物歧化酶(superoxide dismutase,SOD)、过氧化氢酶(Catalase,CAT)及丙二醛(Maleic dialdehyde,MDA)含量的影响,初步探讨其脑保护作用机制.方法：将90只健康成年雄性SD大鼠随机分为假手术组(30只)、模型组(30只)、给药组(30只),每组在24h、48h、72h进行神经功能评分,观察
Cadmium (Cd), a toxic environmental contaminant, induces neurodegenerative disorders.Resveratrol, a naturally occurring polyphenol, has been found to exert neuroprotective effects.
格列吡嗪是临床上常用降糖药，但其抗肿瘤作用尚未发现。利钠肽能够抑制肿瘤增殖，心房利钠肽(ANP)选择性结合钠尿肽受体A(NPRA)，促进合成cGMP发挥功能。肿瘤血管生成对肿瘤生长、侵袭及转移起着重要作用。我们通过大规模筛药发现格列吡嗪能抑制鸡胚血管发生，进而发现能抑制人血管内皮细胞迁移及管腔形成；能够显著抑制黑色素瘤和乳腺癌移植瘤、自发乳腺癌小鼠肿瘤的生长转移及血管生成；并且促进了血管发生抑制基
The histone H3 Lys 27 (H3K27) demethylase JMJD3 has been shown to play important roles in transcriptional regulation and cell differentiation.
MicroRNAs (miRNAs) have been shown to be dysregulated in virus-related cancer.However, cellular miRNA pathways regulating virus-related cancer development and progression remain poorly understood.
芦笋是高营养的保健蔬菜,其产业在我国发展迅速.许多模式植物黄酮类化合物尤其是花色苷的合成与调控已被阐明,但芦笋花色苷的合成调控及其与其它黄酮化合物合成之间的相互关系等尚不清晰.本研究以两年龄绿芦笋“格尔夫”两性株自交后代的雌株(XX)和雄株(XY)为材料,在其花芽分化期(嫩笋期)、花蕾期、开花期三个不同花期取材,通过高通量转录组测序技术筛选芦笋中花色苷及其它黄酮类化合物关键合成酶差异基因并进行基因
Enzyme encoded by bacterial MurE genes catalyzes the formation of uridine diphosphate-Nacetylmuramic acid-tripeptide in bacterial peptidoglycan biosynthesis.Functional analysis of MurE genes in green