排序方式: 共有12条查询结果,搜索用时 15 毫秒
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鸡败血霉形体病是一种由败血霉形体引起的慢性呼吸道传染病。病鸡面部水肿,并出现呼吸道症状。近些年随着规模化养鸡业的发展,该病的发生日益严重,给养鸡业带来较大的经济损失。 相似文献
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粘质沙雷氏菌几丁质酶(ChiC)基因克隆及其生物信息学分析 总被引:6,自引:0,他引:6
从粘质沙雷氏菌(Serratia marcescensATCC14041)中克隆出几丁质酶基因(ChiC),将回收纯化的PCR产物与载体pMD18-T连接,构建成的重组质粒命名为pMD-Ch iC,将重组质粒转化到受体E.coliDH5α中进行克隆,经BamHI和NheI双酶切验证、核酸序列测定证实,重组质粒pMD-Ch iC含有几丁质酶C基因(ChiC)。利用生物信息学的方法,推测该粘质沙雷氏菌ChiC基因编码的蛋白质由480个氨基酸组成。预测该蛋白的等电点为5.63,分子量约为52kD。针对粘质沙雷氏菌中的几个几丁质酶基因做了进化树,进而验证了粘质沙雷氏菌(Serratia marcescens)几丁质酶(ChiC)在沙雷氏菌几丁质酶中的分类;同时对粘质沙雷氏菌几丁质酶C(ChiC)蛋白的高级结构作出了预测,得到其编码的属于18家族的蛋白质高级结构图谱。 相似文献
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[目的]探讨不同科之间DNA导入后的性状变异情况,并从中筛选优良稳定变异株系。[方法]利用花粉管通道法将大豆总DNA导入普通玉米自交系7313,逐代选择,至玉米田间性状、籽粒颜色、形状、果穗轴色等均稳定,对筛选出的变异株系果穗籽粒进行粗蛋白、醇溶蛋白、谷蛋白和油分含量的测定和比较。[结果]株系26h-4-3的籽粒粗蛋白、醇溶蛋白、谷蛋白和油分含量与对照相比差异都达到显著或极显著水平,在D3和D4代的提高幅度分别为10.34%和26.70%、6.58%和6.28%、15.09%和70.34%5、5.82%和51.52%;株系26h-3-1的各项指标与对照相比也有极大提高,在D3和D4代的提高幅度分别为5.67%和21.63%、1.91%和2.31%、10.85%和62.27%2、2.49%和9.67%。[结论]26h-4-3和26h-3-1变异株系的粗蛋白、醇溶蛋白、谷蛋白和油分含量都稳定提高,是符合高蛋白育种目标的优良变异株系。 相似文献
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大豆DNA导入玉米后代植株蛋白质和油分的分析(英文) 总被引:6,自引:1,他引:5
[Objective] The experiment was aimed to explore character variation between different families after DNA introduction and select variant plants with good stability. [Method] The method of pollen-tube-pathway was used to introduce total DNA of soybean into normal maize inbred line 7313 for selecting generation by generation. When field characters of maize, grain colors, grain traits and panicle axis colors were stable, the crude protein, gliadin, glutelin and oil content of grains which were selected from variant strains were detected and compared. [Result] The grain crude protein, gliadin, glutelin and oil content of line 26h-4-3 were significantly different from these of control treatment. The increments of D3 and D4 generation were 10.34% and 26.70%, 6.58% and 6.28%, 15.09% and 70.34%, 55.82% and 51.52% respectively. All indexes of line 26h-3-1 were also higher than these of control treatment and the increments of D3 and D4 generation were 5.67% and 21.63%,1.91% and 2.31%, 10.85% and 62.27%,22.49% and 9.67%. [Conclusion] The crude protein, gliadin, glutelin and oil content of variant line 26h-4-3 and 26h-3-1 were stable, so variant line 26h-4-3 and 26h-3-1 were excellent variant strains which satisfied the requirement of high protein breeding. 相似文献