Sequence Analysis of Polymorphic Fragments in the Third Intron of Porcine H-FABP Gene

[ Objective] The aim of this study was to provide a theoretical basis for exploring the major genes affecting intramuscular fat （IMF） deposition. [Method] Taking 383 pigs from five breeds including Mashen Pig, Large White Pig, Landrace, Duroc and Shanxi White Pig as the experimental animals, polymorphisms of partial fragments in the third intron of porcine H-FABP gene were detected by PCR-SSCP method, and then the polymorphic fragments were sequenced. [ Result] Two alleles, designated as A and B, were found at the locus 346 in the third intron of porcine H-FABP gene, and the mutation was caused by a A→G substitution. [ Conclusion] A polymorphic locus was discovered in the third intron of porcine H-FABP gene in this experiment, laying a foundation for the further study on the relationship between H-FABP gene and IMF content.

有关Hamilton图与连通度的一个充分条件

利用插点方法和H序列,证明了如果G是n阶简单图,κ=κ(G)≥k≥2.而(a1,a2,…,ak+1)是H序列.若对于任意的Y∈I(ke+)1(G),有∑k+1i=1aisi(Y)+sk+1(Y)>n+κ+k-3,则G是Hamilton图.该定理也是对这方面已有的某些定理的有效推广.

图的Hamilton-圈与连通度

利用插点方法和H 序列 ,给出l 连通图G是Hamilton

广义线性图嵌入分布的收敛速度

线性图序列的亏格分布已经被研究了30多年.此前,大部分文献关注于寻找图序列嵌入分布的具体表达式、递推关系式或者对数凹的证明.近期的研究表明:对于广义线性图序列{G_(n)^(o)},在一定条件下,当n趋向于无穷时,G_(n)^(o)的嵌入分布会收敛于正态分布(参见[Adv.Appl.Math.,2021,127:102175].基于此工作,在类似的条件下,本文证明了其收敛速度的阶为1/√n.同时,论证了该收敛速度估计的最优性.最后,给出了一些具体的例子.