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Effects of Mo addition on microstructure of a 4th generation Ni-based single crystal superalloy

Progress in Natural Science:Materials International 2022年第6期32卷 745-751页

作者： Yuan Cheng Xinbao Zhao Wanshun Xia Qinghai Pan Quanzhao Yue Yuefeng Gu Ze Zhang Institute of Superalloys Science and Technology School of Materials Science and Engineering Zhejiang University

The effects of Mo addition on the microstructure of a 4th generation Ni-based single crystal superalloy were *** addition significantly promoted elements Mo,W and Re partition into γ phase and enhanced absolute lattice misfit at 1100℃.The increase of Mo concentration from 2 wt% to 4 wt% also decreased the content of eutectic islands and the segregation ratios of other alloying elements in the as-cast state,especially Re and *** heat treatments,the size of γ' phase and width of γ channels decreased slightly with higher Mo *** Mo additions slightly enhanced the segregation behavior of Re while reducing the segregation behavior of ***,it revealed that the primary and secondary dendrite arm spacings were barely affected by Mo addition.

关键词： Ni-based single crystal superalloys Mo segregation ratio Lattice misfit

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Genetic Mapping of Laminaria japonica and L. Iongissima Using Amplified Fragment Length Polymorphism Markers in a ＂Two-Way Pseudo- Testcross＂ Strategy

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Journal of Integrative Plant Biology 2007年第3期49卷 392-400页

作者： Yuhui Li Yingxia Yang Jidong Liu Xiuliang Wang Tianxiang Gao Delin Duan Ocean University of China Qingdao 266003 China Institute of Oceanology the Chinese Academy of Sciences Qingdao 266071 China Ludong University Yantai 264025 China

With a ＂two-way pseudo-testcross＂ mapping strategy, we applied the amplified fragment length polymorphism （AFLP） markers to construct two moderate density genetic linkage maps for Laminaria. The linkage maps were generated from the 60 progenies of the F1 cross family （Laminaria iongissima Aresch. × L. Japonica Miyabe） with twenty pairs of primer combinations. Of the 333 polymorphic loci scored in 60 progenies, 173 segregated in a 1：1 ratio, corresponding to DNA polymorphisms heterozygous in a single parent, and the other 58 loci existing in both parents followed a 3：1 Mendelian segregation ratio. Among the loci with 1：1 segregating ratios, 79 loci were ordered in 14 linkage groups （648.6 cM） of the paternal map, and 72 loci were ordered in 14 linkage groups （601.9 cM） of the maternal map. The average density of loci was approximately 1 per 8 cM. To Investigate the homologies between two parental maps, we used 58 loci segregated 3：1 for further analysis, and deduced one homologous linkage group. The linkage data developed in these maps will be useful for detecting loci-controlling commercially important traits for Laminaria.

关键词： amplified fragment length polymorphism makers genetic linkage map Laminaria japonica Laminaria longissima segregation ratio two-way pseudo-testcross strategy

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segregation of AFLP Markers in A ( Populus tomentosa× P. bolleana) ×P. tomentosa Carr. BC_1 Family

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Forestry Studies in China 2002年第2期4卷 21-26页

作者：张德强张志毅杨凯田林北京林业大学毛白杨研究所北京100083 中国农业科学院品质所北京100081

To investigate the levels of polymorphisms and Mendelian segregation ratio in clone “TB01” (P. tomentosa×P. bolleana) ×clone “LM50” (P. tomentosa) BC 1 population at the entire genome level, amplified fragment length polymorphisms (AFLPs) analysis was conducted for both parents and 120 progenies. Forty one pairs of selective primers were used to detect 2?707 bands, of which 712 (26.4%) were polymorphic. Chi\|square tests were performed to examine if the observed genotypic frequencies of AFLP loci deviated from expected 1∶1 Mendelian segregation ratio ( P segregation ratio, corresponding to DNA polymorphisms heterozygous in one parent and a null in the other. The result shows that the AFLP markers are very suitable for fingerprinting and genetic mapping in the Chinese white poplar (Populus tomentosa Carr.).

关键词： AFLP polymorphic loci segregation ratio Chinese white poplar ( Populus tomentosa Carr.)

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