Bamboo NiR gene is associated with regeneration capacity     

Xiaomei Guo  Lifen Ji  Longfei Zhu  Liling Song  Shinan Liu  Qiaolu Zang 《The Journal of Horticultural Science and Biotechnology》2018,93(2):142-149

It was reported that the activity of NiR (nitrite reductase) enzyme encoded by the NiR gene was correlated with the regeneration ability in rice. To testify the function of NiR gene in bamboo, seven bamboo species whose calli had different differentiation rate were chosen to analyse their NiR enzyme activity. The results showed that bamboo NiR enzymatic activity had a certain correlation with the regeneration capacity. A NiR gene named DhNiR from Dendrocalamus hamiltonii with high regeneration capacity was cloned. Sequence analysis revealed that the ORF of DhNiR was 1779bp encoding 592 amino acids. Overexpression of DhNiR in rice reduced the time of shoot differentiation and increased the transformation rate, suggesting that DhNiR might play an important role in the regeneration ability of bamboo, and can be applied in regeneration and gene transformation of bamboo and other plant species.  相似文献   

基于本科生科研能力培养的普通昆虫学课程教学改革探讨     

王厚帅 《现代农业科技》2019,(10)

本文从本科生科研能力培养的角度探讨了普通昆虫学理论课、实验课、实习课及考核方式的教学改革,以期促进创新型植物保护人才的培育。  相似文献   

应用型本科实习实训教学质量评价体系研究     

王庆芬 《现代农业科技》2020,(10)

实习实训是应用型本科院校教学中比较重要的环节,实习实训教学质量评价能够反映出学生在实习期间的诸多情况以及专业导师、企业导师和思政导师的指导情况等。针对现在实习实训体系评价不够完整的状况,本文构建了实习实训教学质量评价体系的标准,建立了相对应的二级指标及比例分配。该体系由实习实训的条件、师资队伍、过程、效果4个部分构成,具有更细化的观测点以及较强的可操作性。  相似文献   

预应力薄腹梁质量事故的分析及鉴定     

张国志  王晓军 《东北林业大学学报》1994,22(4):115-119

阐述了某工程由于施工原因，导致预应力混凝土工字形屋面梁强度不足的预制构件的检验鉴定过程和方法。采用回弹法推定混凝土实际强度；通过静载试验测试构件的实际挠度、抗裂和承载能力。分析了导致混凝土强度不足的原因。  相似文献   

普通小麦抗白粉病配合力及其与过氧化物酶的关系   总被引：5，自引：1，他引：4  

胡延吉  李晴祺 《华北农学报》1992,7(2):46-50

选用6个亲本组配成双列杂交设计,对普通小麦抗白粉病的配合力及基因效应进行了分析。结果表明,白粉病病情指数属于数量性状遗传,符合加性—显性遗传模型,由加性效应和非加性效应共同控制,且以加性效应为主。低病情指数为部分显性。不同亲本之间一般配合力效应及含有的有利显性基因数存在明显差别。因此,选配杂交组合应在一般配合力高的基础上,注重其特殊配合力的选择。研究还表明,感病品种过氧化物酶活性高。  相似文献   

区域证券市场发展潜力评价模型的建立及实证分析     

杨军  姚天祥  徐广印 《河南农业大学学报》2001,35(1):84-88

建立了评价区域证券市场发展潜力的数学模型－定权聚类评估模型，并对河南各地区证券发展潜力进行了实证研究。  相似文献   

几种代表性牧草对水牛泌乳高峰期生产性能的影响     

凌明亮  黄仁术  刘建国  胡效东  陈可东 《中国奶牛》2004,(5):30-32

将36头泌乳期、产奶量相近的水牛均分3组,探讨禾本科黑麦草、豆科紫花苜蓿、蓼科鲁梅克斯K-1三种牧草对泌乳高峰期生产性能的影响,结果发现,饲喂鲁梅克斯K-1分别比紫花苜蓿和黑麦草提高15.93%、13.14%的产奶量(P<0.05),以及6.09%、6.63%的乳脂率(P<0.01);而紫花苜蓿与黑麦草间差异均不显著(P>0.05)。故种植鲁梅克斯K-1适合我国农村散养水牛的小区放牧或舍饲补饲。  相似文献   

稀有金属钨丝合股设备研制和改造     

刘国军  徐强 《森林工程》2004,20(4):40-41

通过研制稀有金属钨丝合股设备 ,并根据实际运行情况 ,对设备进行改造 ,完善了其加工性能 ,提高了产品的经济效益  相似文献   

Development of Chinese Near-isogenic Line of Rice and Their Differentiating Ability of Pathogenic Races of Blast Fungus     

LING Zhong-zhuan  T.Mew  WANG Jiu-lin  LEI Cai-ling  HUANG Ning 《中国农业科学(英文版)》2001,(1):50-56

The rice( Oryza L. ) variety, Lijiangxintuanheigu(LTH), is a universally susceptible variety. A set of near-isogenic lines (NILs) of rice which has single resistance gene for each line was developed by use of LTH as recurrent parent and Kusabue,Tsuyuake, K1, PiNo. 4, K60 and BL1, which are from Kiyosawa‘s differential varieties(KDV), as donor parents. Differentiating ability of these NILs to Philippine isolates was compared with that of their donor parents, KDV and IRRI‘ s NILs. The results of comparative studies were as follows: (1) Differentiating ability of Chinese NILs to Philippine isolates was much stronger than that of their donor parents and that of KDV. (2) Chinese NILs had similar ability to differentiate races to IRRI‘s NILs or higher differentiating ability than them. But IRRI‘s NILs almost had no differentiating ability to isolates from japonica rice-growing regions. They can not be used to differentiate races of isolates from japonica ricegrowing regions. Whereas, Chinese NILs can be used to differentiate races of isolates from both japonica ricegrowing regions and indica rice-growing regions. It was concluded that the set of Chinese NILs can be used as international differentials.  相似文献   

枣品种枣股有效结果年龄与丰产性的关系   总被引：2，自引：0，他引：2  

毕平  康振英 《山西农业科学》1993,21(1):48-51

根据枣股的有效结果年龄,把调查的125份枣品种分为4个类型:1～3龄枝结果为主;2～9龄枝结果为主;1～9龄枝结果为主和2～6龄枝结果为主,它们分别形成各类品种产量的85%以上。“1～3”型品种早果性强,早丰性好.但成龄树立体结果能力极差;“2～9”型品种早果性差,但开始结果后产量上升快丰产稳产:“1～9”型品种多数为小果型品种,虽早果性强,但早丰性差,盛果期树立体结果能力强;“2～6”型品种早果性较差,并有不同程度的大小年现象。  相似文献