广东省甜玉米(Zea mays L.saccharata Sturt)区试品种高产稳产性分析

为了更好地鉴定广东省甜玉米新品种的丰产性以及稳定性,本研究采用高稳系数和稳定性参数等分析方法,对2017年春植甜玉米区域试验15个甜玉米新组合区域试验数据的高产性和稳产性进行分析比较。结果表明,高稳系数最高的前五位是‘华美甜9号’>‘优群甜1号’>‘金百甜15’>‘金百甜28’>‘新美甜818’;变异系数最小的前五位为‘优群甜1号’<‘江甜019’<‘微风甜6号’<‘天丰甜618’<‘新美甜818’;结合稳定性系数,表现出高产稳产的有两个组合分别为‘优群甜1号’和‘新美甜818’,综合表明15个区试中‘优群甜1号’和‘新美甜818’的高产稳产性最好。本试验为筛选高产稳产性甜玉米品种提供参考依据。     

不同密度下玉米抗倒性相关性状的探究

倒伏是影响玉米产量和玉米机械化收获的主要限制因素,因此深入研究玉米倒伏问题对玉米生产的发展具有重要意义。本试验以PH6WC、M03、KW9F591、J1495、JD108为母本,以PH4CV、J9D207、J1673、J1668、KW6F600、M5972为父本,并组配30个杂交组合,对其在不同种植密度下抗倒伏相关性状的遗传特性进行研究。结果表明,KW9F591、J1495和JD108的茎秆拉力表现好;组合S1、S15、S16的茎秆拉力表现好。M03和J1495的茎粗表现好;组合S5、S10、S28的茎粗表现好。PH6WC和M5972的穗高系数表现好;组合S3、S5、S6、S10、S12、S13、S23、S24、S26、S29的穗高系数表现好。茎秆拉力与茎粗呈极显著正相关;茎秆拉力与穗高系数和密度呈极显著负相关。     

Detection of mast cell degranulation by fluorescent molecular diffusion dynamic measurement

AIM：To establish a rapid in vitro method for mast cell degranulation tracing by raster image correlation spectroscopy (RICS). METHODS：RBL-2H3, a basophilic granulocyte mast cell line transfected with CD63-GFP plasmid, was used for evaluating the methods, including β-hexosaminidase (HEX) colorimetric assay, scanning electron microscopy (SEM) and RICS in the detection of mast cell degranulation. The sensibilities of these methods were compared. RESULTS：The sensitivities of β-HEX colorimetric assay and SEM were 5 mg/L and 3.9×10-2 mg/L, respectively. RICS detection showed obvious decrease in the diffusion coefficient at dose of 3.9×10-2 mg/L. CONCLUSION：Fluorescent molecular diffusion dynamic measurement can be used for rapid tracing of allergic substances in vitro. According to the results, RICS can achieve nearly the same extent of sensitivity as the SEM does and is far more sensitive than β-HEX colorimetric assay. Compared with SEM, RICS has several advantages: it is faster, simpler and cheaper; it can be used in living cells; it is more suitable for rapid in vitro allergenic compounds tracing. Therefore, RICS is applicable in clinic allergic antigen screening and may also be used in pharmaceutical quality control.     

芒果炭疽病菌对甲基硫菌灵的敏感性测定

采用生长速率法测定了采自中国芒果主产区、泰国、夏威夷等地的127个芒果炭疽菌对甲基硫菌灵的敏感性。结果表明,芒果炭疽菌株对甲基硫菌灵的EC50值范围为0.005 7~7.850 5μg/m L,最大EC50值是最小EC50值的1 377倍。不同地区、不同染病部位、不同年份的芒果炭疽菌株对甲基硫菌灵的敏感性不同,采自四川菌株敏感性最低,采自夏威夷菌株敏感性最高;不同分离部位敏感性程度依次为枝、果、叶;2011~2013年,菌株敏感性逐年降低,存在很大的抗药性风险。     

Ⅱ型乘法频率曲线应用可行性研究

利用60项全国大型水利工程的洪水系列,通过Ⅱ型乘法频率曲线(X-Ⅱ)与P-Ⅲ型间的全面对比分析证明:X-Ⅱ型比P-Ⅲ型具有更多的优点,因此已具有工程应用的条件。     

粗毛型长毛兔生长发育及产毛量的研究

对选育出的牛泉粗毛型长毛兔１００只种兔的生长发育及产毛量进行了研究。结果表明：Ｗ以母兔的初生个体重分别为５６．５３克和５６．６７克，成年公母兔体重分别为４４０３．３５克和４４４６．６５克，成年公母兔年剪毛量分别为１２３３．５０克和１２４９．４３克。体尺、体重、单次剪毛量间均呈极显著的正相关（Ｐ＜０．０１）。直接影响单次剪毛量最大的性状是体重，其相关和通径系数较高（ｒｙｘ５＝０．９６３０，ｐｙｘ５＝０．９２３３）。     

An Experimental Investigation of Condensation Heat Transfer of HC600a-Oil Mixture in a Horizontal Micro-fin Tube

Experimental study of condensation heat transfer of HC600a-oil mixture in a horizontal micro fin tube is performed to investigate the inflence of oil percentage, saturated pressure and mass flux on condensation heat transfer.The empirical correlation according to this study is well correlated by the experimental data. By comparing with other refrigerants, HC600a has no inflence on ozone depletion and better heat transfer characteristcs than CFC12 and HCFC134a. It is a promising substitute for CFC12.     

Comparison of Harvest Index and Grain/Straw-Ratio with Applications to Winter Oilseed Rape

To compare the statistical properties of harvest index and grain/straw-ratio their variabilities (expressed by the relative measure coefficient of variation), their skewnesses and kurtoses have been compared theoretically.
With regard to variability, the harvest index exhibits a clear superiority (= smaller variability) compared to the grain/straw-ratio. For skewness and kurtosis no such generally valid relationships exist. But, for the range of the empirically most relevant parameter values one obtains approximately equal numerical values for skewness as well as for kurtosis of harvest index and grain/straw-ratio. Finally, the theoretical results and conclusions have been checked and applied to the experimental data sets from a field trial with ten European cultivars/lines of winter oilseed rape.     

近交系数计算的程序设计

本文运用字符标记的方法,编制了近交系数计算的程序。利用本程序计算近交系数,不需要对原始系谱整理编码,可将系谱的畜号直接输入计算机处理和运算,使用方便,运算结果准确。本程序可以在 IBM—PC 和 PC—1500微机上运行。