小麦TaSnRK2.10的多态性及与农艺性状的关联

【目的】蔗糖非发酵蛋白激酶（SnRK）是一类丝氨酸/苏氨酸蛋白激酶,在植物信号传递途径中发挥着重要作用。研究小麦TaSnRK2.10的多态性,开发其功能标记,并进行标记-表型性状关联分析,为利用分子标记进行遗传改良和种质创新提供依据。【方法】以30份多态性较高的六倍体普通小麦及其野生近缘种的二倍体和四倍体为材料,通过测序分析TaSnRK2.10-A的序列多态性;利用中国春缺-四体材料对该基因进行染色体定位;利用RIL群体（偃展1号×内乡188）对基因进行遗传定位;根据TaSnRK2.10-A序列多态性,开发分子标记,以262份普通小麦构成的自然群体为材料分析基因单倍型与表型性状的关联特性。【结果】克隆了小麦TaSnRK2.10的A、D基因组序列,在由30份多态性较高的小麦材料组成的自然群体中,没有检测到来自D基因组的TaSnRK2.10-D序列多态性;TaSnRK2.10-A全长4 688 bp,包括启动子1 934 bp、5′-UTR 343 bp、编码区2 319 bp及3′-UTR 92 bp。在基因全长序列中共检测到15个SNP、2个InDel。其中,启动子区有8个SNP,5′-UTR有2个,编码区有5个。位于编码区的5个SNP中,2个存在于外显子,其中一个是非同义突变。2个InDel均位于编码区。根据序列多态性分别设计了启动子区的分子标记PM1和PM2,以及基因编码区的分子标记GM1和GM2。利用中国春缺-四体材料将TaSnRK2.10-A定位于小麦染色体4A,利用RIL群体将TaSnRK2.10-A定位在染色体4A的标记Xwpt7001和WMC48之间,与2个侧翼标记的遗传距离分别为5.1 cM和25.7 cM。利用开发的4个分子标记,将自然群体的262份材料分为4种单倍型,分别与千粒重、单株穗数和每穗小穗数显著相关或极显著相关,HapⅡ和HapⅢ是提高千粒重的优异单倍型。4 184 bp位点为C时,为高千粒重的优异等位变异。【结论】小麦TaSnRK2.10-A位于染色体4A。HapⅡ和HapⅢ是提高千粒重的优异单倍型,HapⅣ是提高单株穗数的优异单倍型,4 184 bp位点的胞嘧啶（C）是优异等位变异。     

SFB‐based S‐haplotyping of apricot (Prunus armeniaca) with DHPLC

Most cultivars that belong to the Rosaceae are self‐incompatible and depend on cross‐pollination. The pollen donor and pollen recipient have to flower synchronously and must be genetically compatible. Genetic compatibility is governed by the S‐locus, which holds the S‐RNase and S‐haplotype‐specific F‐Box (SFB) genes. Thus, the S‐genotype of cultivars is an important feature and is characterized molecularly by the S‐RNase and SFB alleles which are distinctive for each S‐haplotype. Here, we report the usage of DNA chromatography (denaturing high‐performance liquid chromatography – DHPLC) for identifying the S‐genotypes of European apricots on the basis of their SFB alleles. DHPLC is amenable to high‐throughput automation, and therefore is valuable for breeding and for high‐quality plant typing in the nursery.     

Haplotype diversity in MC1R locus between the Min and white-haired pig breeds

In this article, we investigated the genetic variations in the coding region of porcine melanocortin receptor 1 (MC1R) gene in three pig breeds (Min, Yorkshire and Landrace) with black and white coat colors. Six polymorphic sites were found to be significantly associated with coat color. Two blocks were identified in the linkage disequilibrium map, the haplotypes in the first block are nt67/68indelCC and nt67/68indel--, and the haplotypes in the second block are ACCGA and GTTAG. The median-joining network diagram of MC1R haplotypes showed most Min pigs and other Asia domestic breeds own similar haplotypes to ACCGA, while the haplotypes of Europe pig breeds are similar to GTTAG. The phylogenetic analysis of the MC1R CDS further showed Min pigs are close to Laiwu pigs (Shandong, China), which indicated that the black coat color trait of Min pig might be originated and evolved from the black pig breed in Shandong Peninsula of China.     

Genetic connectivity of the South American fur seal (Arctocephalus australis) across Atlantic and Pacific oceans revealed by mitochondrial genes

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河南汉族人群7个Y-STR基因座单倍型分析

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Haplotyping of Rice Genotypes Using Simple Sequence Repeat Markers Associated with Salt Tolerance

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Sequence Polymorphisms and Phylogenetic Relationships of hina Gene in Wild Barley from Tibet, China

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Sequence Polymorphisms and Phylogenetic Relationships of hina Gene in Wild Barley from Tibet, China

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