• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>African Journal of Biotechnology >Studies on the influence of temperature and humidity on biological traits of silkworm (Bombyx mori L.; Bombycidae)
【24h】

Studies on the influence of temperature and humidity on biological traits of silkworm (Bombyx mori L.; Bombycidae)

机译：温度和湿度对蚕生物学性状的影响（BOMBX MORI L.; BOMBYCIDAE）

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Impact of variations in temperature and humidity on pupation, hatchability and larval mortality of eleven inbred silkworm lines M-101, M-103, M-104, M-107, Pak-1, Pak-2, Pak-3,? Pak-4, PFI-I, PFI-II and S-1 was investigated during autumn and spring, 2007-2008 at Sericulture Research Laboratory, Lahore. The experiment was laid out in factorial design with replications and the data was pooled over season.? The larvae of 4th?and 5th?instar were exposed to three temperature regimes (25, 30 and 35 ± 1°C).?Significant variations in hatchability, pupation and mortality were noticed due to the effect of temperature and relative humidity on 4th?and 5th?instar larvae of inbred silkworm lines. The maximum mean values of hatchability (93.15), pupation (93.12) and the lowest mean larval mortality (2.60) was observed at 25°C and 70-80% RH. Lower RH of (55 and 65%) even at 25°C lowered the hatchability and pupation of the silkworm lines and contributed significantly in higher larval mortality. The lowest mean value of hatchability (68.96) and pupation (76.55) was recorded at 35°C and 55% RH while highest larval mortality (11.92) was noticed at 35°C with 55% RH. The results indicate that the mean performance of inbred silkworm lines under various conditions of temperature and humidity was significantly different from each other at various temperature and humidity exposures during 4th?and 5thinstar. At 25°C with 75% RH, the performance of silkworm lines remained consistent but variations in temperature or humidity for three hours significantly affected all three parameters (hatchability, pupation and larval mortality). The results illustrate that hatchability percentage of M-101(84.98), Pak-2 (84.52), Pak-3 (84.32) and Pak-4 (84.05) and pupation rate of Pak-4 (86.60), Pak-2 (86.08), PFI-I (85.33) and M-101(84.88) was significantly better as compared to other silkworm lines. The mean values of larval mortality observed in Pak-2 (5.56), Pak-3 (5.76), PFI-I (6.03) and M-107 (6.20) showed significantly lower mortality. The lower relative humidity level (less than 65%) is not conducive for seed cocoon production even at the optimum temperature of 25°C. The study clearly underlines the importance of optimization of environmental conditions during larval rearing in relation to seed cocoon production. The investigations strongly recommend that temperature and relative humidity in the range of 25-26°C and 70-80% respectively are mandatory for excellent results of egg hatchability, pupation and survival rate (low larval mortality). The results also emphasize that Pak-2, Pak-3, Pak-4, PFI-I, M-101 and M-107 showed better potential for seed production and commercial exploitation.
机译：十一近蚕豆系蛹，孵化性和幼虫死亡率变化的影响M-101，M-103，M-104，M-107，PAK-1，PAK-2，PAK-3 ,?在拉合尔蚕桑研究实验室，2007 - 2008年秋季和春季研究了PAK-4，PFI-I，PFI-II和S-1。在因子设计中奠定了试验，并通过赛季汇集了数据。第4次幼虫（第4次）幼虫暴露于三个温度制度（25,30和35±1℃）。滞后性，蛹和死亡率的显着变化由于温度和相对湿度在第4次的影响？和第5个？Instar蚕丝线的幼虫。在25℃和70-80％RH下观察到孵化率（93.15），蛹（93.12）和最低平均幼虫死亡率（2.60）的最大平均值。 （55和65％）的低温均匀于25°C降低了蚕丝线的孵化率和瞳孔，并在幼虫死亡率中显着贡献。在35℃和55％RH的35℃和55％RH时记录最低平均值（68.96）和蛹（76.55），而在35℃下，用55％RH注意到最高幼虫死亡率（11.92）。结果表明，在第四次湿度和湿度曝光的各种温度和湿度下，在各种温度和湿度下近蚕线的平均性能均有显着不同？在25℃下，75％RH，蚕系的性能保持一致，但温度或湿度的变化三小时显着影响所有三个参数（孵化率，蛹和幼虫死亡率）。结果说明了M-101（84.98），PAK-2（84.52），PAK-3（84.32）和PAK-4（86.60）的蛹率（86.60），PAK-2（86.08）的孵化率百分比），与其他蚕线相比，PFI-I（85.33）和M-101（84.88）显着更好。在PAK-2（5.56）中观察到的幼虫死亡率的平均值（5.56），PAK-3（5.76），PFI-1（6.03）和M-107（6.20）表现出显着降低的死亡率。较低的相对湿度水平（小于65％）不利于种子茧产量，即使在25℃的最佳温度下也是如此。该研究显然强调了在幼虫饲养期间优化环境条件的重要性，与种子茧产量有关。该研究强烈建议，对于优异的蛋孵化率，蛹和生存率（幼虫死亡率），温度和相对湿度分别的温度和相对湿度分别是强制性的。结果还强调，PAK-2，PAK-3，PAK-4，PFI-I，M-101和M-107表现出种子生产和商业剥削的更好潜力。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号