群体表型性状研究揭示环境与遗传因素对霍山石斛表型及物种分类的影响

石斛属(Dendrobium)种类繁多,属内物种具有丰富的表型多样性。霍山石斛(D.huoshanense)为我国特有物种,其与河南石斛(D. henanense)和细茎石斛(D. moniliforme)以及铁皮石斛(D. catenatum)等近缘种表型相似,在分类处理中存在争议。这种争议很大程度上与植物普遍存在的表型可塑性和代际共存有关。为探究环境和代际间遗传因素对霍山石斛表型性状的影响以及霍山石斛与近缘种的物种边界问题,本研究观测了安徽省霍山县霍山石斛(野生、林间和温室F1代、林间和温室F2代)、野生河南石斛、细茎石斛和铁皮石斛,共计16个群体2,279株植株的假鳞茎茎长等12个表型性状;在种内层面,首次借鉴生态学同质园实验和遗传学代际间性状比较的方法,对霍山石斛群体表型性状进行差异显著性检验和95%置信区间比较以及主成分和变异系数等统计学分析。在种间层面,对霍山石斛与河南石斛和铁皮石斛等近缘种群体表型性状进行比较和分析。结果表明,环境因素对霍山石斛假鳞茎茎长和假鳞茎直径等具有显著的影响,代际间遗传因素对霍山石斛假鳞茎直径具有显著的影响。霍山石斛与铁皮石斛和细茎石斛等近缘种群体在假鳞茎茎长、假鳞茎直径、花瓣长和花瓣宽等表型性状方面均存在显著性差异和间隔,但与河南石斛仅在假鳞茎表型性状方面有显著性差异。我们的研究明确了环境和代际间遗传因素对霍山石斛表型性状的影响程度,为霍山石斛与近缘种等争议物种的分类和鉴定提供了表型证据

伊犁河谷红地球葡萄标准化栽培技术研究及产业化建设

课题根据伊犁河谷红地球葡产区的气候条件，确定了红地球葡萄的定植方式采用小棚架栽植效果好，修剪方式采用“独龙干”和“双龙干”较为适宜，确定了疏花疏果时间及技术，提高了红地球葡萄一级果率，其中鲜食葡萄二次套袋法技术，既可以有效的防止果穗日灼现象的发生，同时又可控制果实颜色，防止果穗的污染；确定了红地球葡萄防止日灼的主要方法是：果穗套袋、增加遮荫面积和采用棚架栽培，抬高结果部位等，采用滴灌方式进行灌溉，既达到了经济用水降低生产成本的目的，规范了红地球葡萄无公害生产整个环节的技术规程，红地球葡萄的七个标准化栽培技术规程在生产过程中的贯彻实施；初步形成了“果农＋基地＋协会＋经销商”产业化模式。 成果类别： 应用技

Determination of the number of ψ(3686) events taken at BESIII

The number of ψ(3686) events collected by the BESIII detector during the 2021 run period is determined to be (2259.3±11.1)×106 by counting inclusive ψ(3686) hadronic events. The uncertainty is systematic and the statistical uncertainty is negligible. Meanwhile, the numbers of ψ(3686) events collected during the 2009 and 2012 run periods are updated to be (107.7±0.6)×106 and (345.4±2.6)×106, respectively. Both numbers are consistent with the previous measurements within one standard deviation. The total number of ψ(3686) events in the three data samples is (2712.4±14.3)×10^

Measurement of integrated luminosity of data collected at 3.773 GeV by BESIII from 2021 to 2024

We present a measurement of the integrated luminosity e+e- of collision data collected by the BESIII detector at the BEPCII collider at a center-of-mass energy of Ecm = 3.773 GeV. The integrated luminosities of the datasets taken from December 2021 to June 2022, from November 2022 to June 2023, and from October 2023 to February 2024 were determined to be 4.995±0.019 fb-1, 8.157±0.031 fb-1, and 4.191±0.016 fb-1, respectively, by analyzing large angle Bhabha scattering events. The uncertainties are dominated by systematic effects, and the statistical uncertainties are negligible. Our results provide essential input for future analyses and precision measurements