共查询到20条相似文献，搜索用时 31 毫秒
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YI Bing ;ZHOU Yu-fei ;GAO Ming-yue ;ZHANG Zhuang ;HAN Yi ;YANG Guang-dong ;XU Wen-juan ;HUANG Rui-dong 《中国农业科学(英文版)》2014,(11):2399-2406
Starch content is a key factor affecting sorghum grain quality. The research of sorghum grain starch accumulation and the related synthesis enzyme activities has great signiifcance for understanding the mechanisms of starch metabolisms. The differences between a high and a low starch content sorghum hybrids （Tieza 17 and Liaoza 11, respectively） in grain starch accumulation and the related synthesis enzyme activities were assessed following imposition of water stress during lfowering stage. The total starch, amylase and amylopectin accumulation all decreased at the mid-late stage of grain iflling under drought stress during lfowering stage. The maximum and mean accumulation rates also decreased. During grain iflling, soluble starch synthase （SSS）, granule-bound starch synthase （GBSS）, starch branching enzyme （SBE）, and starch debranching enzymes （DBE） activities were all affected, though differently. Drought stress reduced starch accumulation in a larger extent for Tieza 17 than Liaoza 11. Drought stress during lfowing stage reduced starch synthesis enzyme activities, thus reducing starch accumulation in grains, and the differences between starch components were also demonstrated under drought stress. 相似文献
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LIU Ze-guang YAO Wei-yuan SHEN Xue-xue CHAO Kai-xiang FAN Yu LI Min-zhou WANG Bao-tong LI Qiang JING Jin-xue 《中国农业科学(英文版)》2014,(12):2577-2583
Stripe rust （yellow rust）, caused by Puccinia striiformis f. sp. tritici （Pst）, is one of the most devastating diseases of wheat throughout the world. H9020-1-6-8-3 is a translocation line originally developed from interspeciifc hybridization between wheat line 7182 and Psathyrostachys huashanica Keng and is resistant to most Pst races in China. To identify the resistance gene（s） in the translocation line, H9020-1-6-8-3 was crossed with susceptible cultivar Mingxian 169, and seedlings of the parents, F1, F2, F3, and BC1 generations were tested with prevalent Chinese Pst race CYR32 under controlled greenhouse conditions. The results indicated that there is a single dominant gene, temporarily designated as YrH9020a, conferring resistance to CYR32. The resistance gene was mapped by the F2 population from Mingxian 169/H9020-1-6-8-3. It was linked to six microsatellite markers, including Xbarc196, Xbarc202, Xbarc96, Xgpw4372, Xbarc21, and Xgdm141, lfanked by Xbarc96 and Xbarc202 with at 4.5 and 8.3 cM, respectively. Based on the chromosomal locations of these markers and the test of Chinese Spring （CS） nullitetrasomic and ditelosomic lines, the gene was assigned to chromosome 6D. According to the origin and the chromosomal location, YrH9020a might be a new resistance gene to stripe rust. The lfanking markers linked to YrH9020a could be useful for marker-assisted selection in breeding programs. 相似文献
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LIU Xin ;WANG Li-gang ;LIANG Jing ;YAN Hua ;ZHAO Ke-bin ;LI Na ;ZHANG Long-chao ;WANG Li-xian 《中国农业科学(英文版)》2014,(12):2721-2730
Porcine carcass traits and organ weights have important economic roles in the swine industry. A total of 576 animals from a Large White×Minzhu intercross population were genotyped using the Illumina PorcineSNP60K Beadchip and were phenotyped for 10 traits, speciifcally, backfat thickness （6-7 libs）, carcass length, carcass weight, foot weight, head weight, heart weight, leaf fat weight, liver weight, lung weight and slaughter body weight. The genome-wide association study （GWAS） was assessed by Genome Wide Rapid Association using the mixed model and regression-genomic control approach. A total of 31 single nucleotide polymorphisms （SNPs） （with the most signiifcant SNP being MARC0033464, P value=6.80×10-13） were located in a 9.76-Mb （31.24-41.00 Mb） region on SSC7 and were found to be signiifcantly associated with one or more carcass traits and organ weights. High percentage of phenotypic variance explanation was observed for each trait ranging from 31.21 to 67.42%. Linkage analysis revealed one haplotype block of 495 kb, in which the most signiifcant SNP being MARC0033464 was contained, on SSC7 at complete linkage disequilibrium. Annotation of the pig reference genome suggested 6 genes （GRM4, HMGA1, NUDT3, RPS10, SPDEF and PACSIN1） in this candidate linkage disequilibrium （LD） interval. Functional analysis indicated that the HMGA1 gene presents the prime biological candidate for carcass traits and organ weights in pig, with potential application in breeding programs. 相似文献
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Fine Mapping and Candidate Gene Analysis of Resistance Gene RSC3Q to Soybean mosaic virus in Qihuang 1 总被引：1，自引：0，他引：1
Zheng gui-jie Yang Yong-qing Ma Ying Yang Xiao-feng Chen Shan-yu Ren Rui Wang Da-gang Yang Zhong-lu Zhi hai-jian 《中国农业科学(英文版)》2014,(12):2608-2615
Soybean mosaic virus （SMV） disease is one of the most destructive viral diseases in soybean （Glycine max （L.） Merr.）. SMV strain SC3 is the major prevalent strain in huang-huai and Yangtze valleys, China. The soybean cultivar Qihuang 1 is of a rich resistance spectrum and has a wide range of application in breeding programs in China. In this study, F1, F2 and F2：3 from Qihuang 1×nannong 1138-2 were used to study inheritance and linkage mapping of the SC3 resistance gene in Qihuang 1. The secondary F2 population and near isogenic lines （nILs） derived from residual heterozygous lines （RhLs） of Qihuang 1×nannong 1138-2 were separatively used in the ifne mapping and candidate gene analysis of the resistance gene. Results indicated that a single dominant gene （designated RSC3Q） controls resistance, which was located on chromosome 13. Two genomic-simple sequence repeat （SSR） markers BARCSOYSSR_13_1114 and BARCSOYSSR_13_1136 were found lfanking the two sides of the RSC3Q. The interval between the two markers was 651 kb. Quantitative real-time PCR analysis of the candidate genes showed that ifve genes （Glyma13g25730, 25750, 25950, 25970 and 26000） were likely involved in soybean SMV resistance. These results would have utility in cloning of RSC3Q resistance candidate gene and marker-assisted selection （MaS） in resistance breeding to SMV. 相似文献
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草莓AP1同源基因的克隆、表达及启动子分析 总被引：3，自引：0，他引：3
【目的】从草莓（Fragaria×ananassa）中克隆APETALA1(AP1)同源基因,并分析其在不同组织、器官及不同花发育阶段的表达水平,探讨其在草莓植株成花进程中的作用。【方法】根据其它物种AP1同源基因的保守序列设计简并引物,以草莓幼叶和花芽为试材,克隆得到AP1的基因片段,在此基础上利用RACE的方法分离获得其cDNA全长。利用实时定量RT-PCR分析草莓不同组织、器官及不同花发育阶段中AP1同源基因的表达水平。利用染色体步移的方法分离启动子序列。【结果】从草莓品种‘花姬’中克隆出AP1同源基因的cDNA全长序列,命名为FaAP1;其CDS长度为735 bp,编码245个氨基酸,与玫瑰AP1-1的氨基酸序列同源性最高,达到92%,与拟南芥AtAP1的氨基酸序列同源性为64.00%。FaAP1编码的氨基酸全长序列符合MADS-box基因家族特征,包含MADS-box、I-间插域、K-box域和C-末端几个结构域,是MIKC类型的MADS-box基因家族的成员。实时定量RT-PCR结果表明,在不同组织、不同花器官及不同花发育阶段中FaAP1的表达量存在差异。其启动子除了具有TATA/CAAT-box外还包含一些特异作用元件。【结论】从草莓中分离出的FaAP1基因,在花分生组织形成和花器官发育中有一定的调控作用。 相似文献
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【目的】克隆薄壳山核桃MADS-box基因的保守片段,进行系统发育分析,为研究薄壳山核桃花发育相关MADS-box家族基因及其发育的分子机理奠定基础。【方法】以薄壳山核桃品种‘马罕’雄花花序为材料,提取总RNA反转录cDNA,采用RT-PCR克隆MADS-box基因的保守片段,并将其推导氨基酸序列与已知拟南芥的MADS-box家族基因进行系统发育分析。【结果】分离获得28条MADS-box基因的cDNA片段,片段长度均为137 bp,包含基因起始密码子,核苷酸序列同源性为65.7%~98.5%,其推导氨基酸序列中有11个存在差异。系统发育树分析结果表明,这些基因片段分别归入拟南芥MADS-box基因不同亚家族中,包含ABCDE模型中的各类基因。【结论】薄壳山核桃中存在多种MADS-box家族基因,克隆的片段包含ABCDE模型中的各类花发育基因。 相似文献
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【目的】克隆薄壳山核桃MADS-box基因的保守片段,进行系统发育分析,为研究薄壳山核桃花发育相关MADS—box家族基因及其发育的分子机理奠定基础。【方法】以薄壳山核桃品种‘马罕’雄花花序为材料,提取总RNA反转录cDNA,采用RT—PCR克隆MADS-box基因的保守片段,并将其推导氨基酸序列与已知拟南芥的MADS．box家族基因进行系统发育分析。【结果】分离获得28条MADS-box基因的cDNA片段,片段长度均为137bp,包含基因起始密码子,核苷酸序列同源性为65．7％-98．5％,其推导氨基酸序列中有11个存在差异。系统发育树分析结果表明,这些基因片段分别归人拟南芥MADS．box基因不同亚家族中,包含ABCDE模型中的各类基因。【结论】薄壳山核桃中存在多种MADS．box家族基因,克隆的片段包含ABCDE模型中的各类花发育基因。 相似文献
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MADS-box基因在植物花发育中具有重要作用。采用RT-PCR和RACE技术,从中国水仙幼嫩花蕾中分离到了一个MADS-box同源基因,命名为NtMADS3(GenBank登记号:EU081900)。该基因cDNA全长980 bp;编码区编码241个氨基酸,具有典型的植物MADS-box基因结构。序列分析表明,NtMADS3编码的蛋白与其他植物的MADS-box蛋白有着较高的一致性,其中与石刁柏的AOM3一致性高达89.2%,与拟南芥的AGL6一致性为60.0%。系统进化树分析表明NtMADS3基因属于E类功能基因。组织表达模式分析显示,NtMADS3基因在中国水仙的开花期各器官及花的各部位均有表达。将该基因置于CaMV 35S启动子控制下,构建到载体pBI121的多克隆位点,在拟南芥中异位表达,转基因植株花期提前,但花型无显著变化。 相似文献
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苦瓜MADS盒基因的克隆和表达研究 总被引：1，自引：0，他引：1
根据MADS box基因保守区结构 ,设计简并性引物 ,利用 3’RACE方法 ,从苦瓜 (MomordicacharantiaL .)中分离出花特异表达基因的cDNA片段 .同时利用 5’RACE方法获得了全长cDNA ,命名为BAG .序列分析表明 ,该cDNA全长 10 0 1bp ,含一个编码 2 2 8个氨基酸的完整开放阅读框 ,5’端和 3’端非翻译区分别为 5 0、2 6 7个碱基 ,poly(A)尾巴长 2 2个核苷酸 ,具有典型的植物MADS box基因的结构 .该基因编码的蛋白质与黄瓜 (CUM10 ,CAG1) ,棉花(GHMADS 2 ) ,以及拟南芥AGL11等MADS盒基因蛋白质的同源性分别为 :95 %、93%、84 %、72 % .Southern杂交分析显示 ,在基因组中至少有两个拷贝存在 .应用RT PCR和Northern杂交结果证实 ,该基因在心皮和雄蕊中特异表达 相似文献
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LIU Xiao-fei SUN Wei-min LI Ze-qin BAI Rui-xue LI Jing-xiao SHI Zi-han GENG Hong-wei ZHENG Ying ZHANG Jun ZHANG Gen-fa 《中国农业科学(英文版)》2013,(10):1722-1730
Jojoba（Simmondsia chinensis） is mainly distributed in desert,and the molecular mechanisms of jojoba in response to abiotic stress still remain elusive.In this paper,we cloned and characterized a SOD gene from jojoba named as ScMnSOD,and introduced into Arabidopsis to investigate its functions of responding to drought stress.The transgenic Arabidopsis showed an improvement in drought tolerance.Moreover,under a water deficit condition,the accumulation of reactive oxygen species（ROS） was remarkably decreased in the transgenic lines compared to the WT.Furthermore,the ScMnSOD promoter was cloned to the 5′-upstream of GUS coding region in a binary vector,and introduced into Arabidopsis.And results showed that ScMnSOD expression can be induced by drought,salt,ABA,and low temperature.In conclusion,ScMnSOD plays an important role in drought tolerance which is,at least partially,attributed to its role in ROS detoxification. 相似文献
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AGL47是拟南芥第五染色体上AtSg55690基因编码的1个转录因子,属于MADS-box蛋白质家族,前期研究显示,At5g55690基因受磷胁迫特异诱导表达,极有可能在磷代谢调控中发挥重要的作用.为了进一步鉴定该基因的功能,本研究克隆At5g55690基因全长ORF,构建重组表达载体pPET-28a-At5g556... 相似文献
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葡萄SVP类MADS-box基因的克隆及表达分析 总被引：1，自引：0，他引：1
从无核白葡萄(Vitis vinifera cv.Thompson seedless)中克隆获得一个胚珠发育相关MADS-box基因。该基因cDNA全长1 248bp,ORF为729bp,编码一个含有243个氨基酸的蛋白。氨基酸多序列比对和系统发育分析显示,该基因属于SVP类MADS-box基因。采用半定量技术进行表达分析表明,该基因在葡萄的根、茎、叶、花蕾、盛花和胚珠中均有表达,但是有强弱差异。实时定量PCR技术分析表明在无核葡萄品种无核白胚珠发育过程中基因表达量先升后降,而在有核葡萄品种黑比诺胚珠发育过程中表达量一直呈下降趋势。 相似文献