Genetic analysis of fruit shape traits at different maturation stages in sponge gourd

The fruit shape is important quantitative trait closely related to the fruit quality. However, the genetic model of fruit shapes has not been proposed. Therefore, in the present study, analysis of genetic effects for fruit shape traits （fruit length and fruit perimeter） in sponge gourd was conducted by employing a developmental genetic model including fruit direct effects and maternal effects. Analysis approaches of unconditional and conditional variances were applied to evaluate the genetic behavior of fruit shape traits at economical and physiological maturation times. The results of variance analysis indicated that fruit length and fruit perimeter were simultaneously affected by fruit direct genetic effects and maternal effects. Fruit direct genetic effects were relatively more important for fruit shape traits at whole developmental period. The gene expression was most active at the economical maturation stage （1-12 d after flowering） for two shape traits, and the activation of gene was mostly due to direct dominance effects at physiological maturation stage （13-60 datter flowering）. The coefficients due to different genetic effects, as well as the phenotypic correlation coefficients, varied significantly between fruit shape traits themselves at various maturation stages. The results showed that it was relatively easy to improve fruit shape traits for industrial purpose by carefully selecting the parents at economical maturation stage instead of that at physiological maturation stage.     

Functional characterization of an invertase inhibitor gene involved in sucrose metabolism in tomato fruit

In this study, we produced tomato plants overexpressing an invertase inhibitor gene (Sly-INH) from tomato, using a simple and efficient transient transformation system. Compared with control plants, the expression of Sly-INH was highly upregulated in Sly-INH overexpressing plants, as indicated by real-time polymerase chain reaction (PCR). Physiological analysis revealed that Sly-INH inhibited the activity of cell wall invertase (CWIN), which increased sugar accumulation in tomato fruit. Furthermore, Sly-INH mediated sucrose metabolism by regulating CWIN activity. Our results suggest that invertase activity is potentially regulated by the Sly-INH inhibitor at the post-translational level, and they demonstrate that the transient transformation system is an effective method for determining the functions of genes in tomato.     

基于创新素质培养的“设施果树学”教学改革

“设施果树学”是一门应用性和实践性很强的特色课程,是果树反季节栽培能否成功的关键。为了提高课程的教学效果,提高学生的专业学习兴趣,培养学生分析问题和解决问题的能力,以满足社会对设施园艺人才的需求,根据课程特点,围绕课程现状、理论教学方法创新和教学内容的改革等方面进行了初步探讨,并通过案例进行课程思政教学。实践证明,学生的专业能力和探索能力都有了明显提高,很大程度上推动了“设施果树学”教学改革的发展。     

中国古代荔枝分类方法的研究——以福建省为中心

本文主要依据历代《荔枝谱》,结合地方志对古代福建省荔枝分类方式进行探讨。宋代蔡襄首次将本草系统中的上中下品分类法应用到荔枝分类中,但此方法未得到延续。然而淳熙《三山志》按记录来源的归类方式却对弘治《八闽通志》产生了影响,并促使其产生了几种分类方法,其中成熟期分类法在明末已经完善。本文深入分析早、晚熟荔枝类群,发现现代生物学实验显示荔枝聚类成因与成熟期具有一定的相关性;清代《广东新语》采取的生态分类法也与成熟期分类法有相通之处;且成熟期分类法能够很好地凸显火山荔枝、实生荔枝和其它栽培荔枝类群之间的差异。由此,本文认为传统时代中国荔枝分类学在明末达到了最高峰,且福建省功不可没。     

南丰蜜桔的冻后治理对策

南丰蜜桔受冻后，必须在冻后及时加强管理，采取有针对性的治理对策。     

浅析费·阿·伊斯坎吉尔对《禁果》主人公的塑造

《禁果》节选自前苏联著名作家费·阿·伊斯坎吉尔的中篇小说《柏树下的老屋》,全文通过小男孩“我”之口娓娓道来,清新活跃、质朴明快.特别是作者调动诸多艺术手段刻画的“我”这个小男孩的艺术形象,更是呼之欲出、跃然纸上.同时这部作品还具有很强的现实意义,指明家庭教育在孩子性格养成中所起的重要作用,值得为人父母者深思.     

工农村农户种植果木业收入调查报告

农业内部经济结构调整和农民收入结构多样化,对社会主义新农村建设有着非常大的意义。在当前,尤其应遵循生态经济的发展规律,因地致宜地调整农业经济结构。通过对地处成都市市郊、拥有平原向丘陵地区的过渡地带的工农村进行个案调查,运用规范性研究方法,能深化和丰富对理论的认识。     

滦平县果树种质资源及其开发试验研究

本文从滦平县生态条件和果树种质资源的考察出发，分析了果树发展条件、重点进行了果树品种改良的试验与示范推广工作，并就滦平县果树的进一步发展提出了具体对策     

怀化地区小水果资源调查初报

本文首次报道了怀化地区小水果及野生果树资源的种类、分布和蕴藏量。该地区现有小水果272种及品种,野生果树83种及变种,它们分别隶属于18科,33属。本文为合理开发利用该地区的果树资源,提供了依据和建议。     

基于果蝇优化算法的模拟滤波器设计

基于粒子群优化算法的无源模拟滤波器优化设计方法容易陷入局部最优,收敛速度慢迭代次数多、运算量大且稳定性不够好。提出果蝇优化算法对滤波器的整个参数空间进行高效并行搜索直到获得最优的参数值,实例仿真表明,采用该方法设计的滤波器在相同的带宽准确度及阻带衰减的情况下,具有更快的运算速度及收敛性能。