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RISS 인기검색어
- 검색키워드
- 저자 : Moghaddam S. H. Hosseini (검색결과 5 건)
- 무료
- 기관 내 무료
- 유료
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Genetic Improvement of Some Traits in Four Strains of Silkworm, Bombyx mori L.
( S. H. Hosseini Moghaddam ),( N. Emam Jomeh K. ),( S. Z. Mirhosseini ),( M. R. Gholamy ) 한국잠사학회 2005 International Journal of Industrial Entomology Vol.10 No.2
A breeding plan was carried out on four commercial strains of silkworm (Bombyx mori L.) 101, 102, 103 and 104 to improve some important traits. Genetic gain or response to selection (△G), heritability of cocoon shell weight (CSW) and specific combining ability effects were estimated to determine the strains that can be improved. Strain 101 had lowest heritabitity, △G and viability. Strain 102 was acceptable in selection response but its viability was low. Therefore these two strains were not suitable for more selection. As a result, only lines 103 and 104 were chosen for further improvement. Intra population selection based on independent culling level method practiced from third to sixth generation for both productive and viability traits simultaneously. While CSW and CW had increasingly enhanced during primary generations, they went slightly up after third generation. According to negative genetic correlation, viability decreased during primary generations, but after third generation that paid attention to balanced development of both productive and viability traits, viability increased so that the pupation rate reached to 91% in 103 and 97% in 104 for last generation .(G8)
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Moghaddam S. H. Hosseini,Etebari K. Korean Society of Sericultural Science 2005 International Journal of Industrial Entomology Vol.10 No.2
Recently two breeding programs were carried out for isolation of new parental inbred lines in Iran. This study was undertaken in order to estimate the combining ability effects and heterosis of these lines. For this purpose an $8\times8$ diallel cross analysis including eight inbred lines of silkworm with four lines from each program were studied for their five quantitative traits. The results indicated that reciprocal effects appeared insignificant for most of traits. Japanese lines of 111 and 113 were best combiners for shell weight, cocoon weight and shell percentage traits. With respect to pupation rate, Chinese line 110 was the best and according to general combining ability (GCA) and specific combining ability (SCA) variances, it is superior in specific combinations. Hybrid $109\times110$ showed better characters for both productive and viability traits. Hybrids with high heterosis had high SCA too.
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( S. H. Hosseini Moghaddam ),( K. Etebari ) 한국잠사학회 2005 International Journal of Industrial Entomology Vol.10 No.2
Recently two breeding programs were carried out for isolation of new parental inbred lines in Iran. This study was undertaken in order to estimate the combining ability effects and heterosis of these lines. For this purpose an 8×8 diallel cross analysis including eight inbred lines of silkworm with four lines from each program were studied for their five quantitative traits. The results indicated that reciprocal effects appeared insignificant for most of traits. Japanese lines of 111 and 113 were best combiners for shell weight, cocoon weight and shell percentage traits. With respect to pupation rate, Chinese line 110 was the best and according to general combining ability (GCA) and specific combining ability (SCA) variances, it is superior in specific combinations. Hybrid 109×110 showed better characters for both productive and viability traits. Hybrids with high heterosis had high SCA too.
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Genetic Improvement of Some Traits in Four Strains of Silkworm, Bombyx mori L.
Moghaddam S. H. Hosseini,Jomeh K. N. Emam,Mirhosseini S. Z.,Gholamy M. R. Korean Society of Sericultural Science 2005 International Journal of Industrial Entomology Vol.10 No.2
A breeding plan was carried out on four commercial strains of silkworm (Bombyx mori L.) 101, 102, 103 and 104 to improve some important traits. Genetic gain or response to selection $({\Delta}G)$, heritability of cocoon shell weight (CSW) and specific combining ability effects were estimated to determine the strains that can be improved. Strain 101 had lowest heritabitity, ${\Delta}G$ and viability. Strain 102 was acceptable in selection response but its viability was low. Therefore these two strains were not suitable for more selection. As a result, only lines 103 and 104 were chosen for further improvement. Intra population selection based on independent culling level method practiced from third to sixth generation for both productive and viability traits simultaneously. While CSW and CW had increasingly enhanced during primary generations, they went slightly up after third generation. According to negative genetic correlation, viability decreased during primary generations, but after third generation that paid attention to balanced development of both productive and viability traits, viability increased so that the pupation rate reached to $91\%$ in 103 and $97\%$ in 104 for last generation $(G_8)$.
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Exact solution for axial vibration of the power, exponential and sigmoid FG nonlocal nanobeam
Hosseini, S.A.H.,Moghaddam, M.H. Noroozi,Rahmani, O. Techno-Press 2020 Advances in aircraft and spacecraft science Vol.7 No.6
The present study investigates axial vibration of a FG nanobeam using nonlocal elasticity theory under clamped-clamped and clamped-free boundary conditions. Power law, exponential law and sigmoid law are applied as grading laws to examine the effect of the material distribution on axial vibration of the FG nanobeam. A parametric study was done to examine the effect of length scale on the dynamic behavior of the structure and the results are presented. It was observed that consideration of the nonlocal length scale is essential when analyzing the free vibration of a FG nanobeam. The results of the present study can be used as benchmarks in future studies of FG nanostructures.
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