采取混合取样策略,利用荧光SSR技术对来源于我国7个省(自治区)的90份糯玉米地方品种和6个标准测验种自交系基因组的31个简单序列重复(SSR)位点进行了分析。在90个糯玉米地方品种中,共检测出216个等位变异,每个位点检测出2～12个,平均6.9...采取混合取样策略,利用荧光SSR技术对来源于我国7个省(自治区)的90份糯玉米地方品种和6个标准测验种自交系基因组的31个简单序列重复(SSR)位点进行了分析。在90个糯玉米地方品种中,共检测出216个等位变异,每个位点检测出2～12个,平均6.97个,多态性信息量(PIC,polymorphic information content)为0.67,标记指数(MI,marker index)为4.92。可初步将90份糯玉米地方品种划为3个类群,其中,广西和贵州的糯玉米地方品种的遗传多样性相对更丰富。展开更多
通过对抗蚜小麦品种正科1号×感蚜品种石4185的F2分离群体(495株)进行田间自然抗蚜调查,发现正科1号的抗蚜虫性状受显性单基因控制,鉴定出的这个显性抗蚜基因,暂定名为dnY。运用分离群体分组法(BSA)筛选到3个在抗感亲本间表现多态性...通过对抗蚜小麦品种正科1号×感蚜品种石4185的F2分离群体(495株)进行田间自然抗蚜调查,发现正科1号的抗蚜虫性状受显性单基因控制,鉴定出的这个显性抗蚜基因,暂定名为dnY。运用分离群体分组法(BSA)筛选到3个在抗感亲本间表现多态性的SSR标记(Xwms350、Xgwm437、Xgwm44);进一步将该基因定位于7DS上,距离该基因最近的标记为Xgwm44,遗传距离3.29 c M。同时讨论了基因dnY在小麦遗传改良以桨标记在抗蚜基因标记辅助选择中的作用。展开更多
Bulk-SSR method was used to analyze the genetic diversity of 44 open-pollinated varieties collected from Henan, Shandong, Shanxi, and Jilin provinces and Guangxi Zhuang Autonomous Region, China using 70 pairs of SSR p...Bulk-SSR method was used to analyze the genetic diversity of 44 open-pollinated varieties collected from Henan, Shandong, Shanxi, and Jilin provinces and Guangxi Zhuang Autonomous Region, China using 70 pairs of SSR primers. The purposes of this study were to （1） compare the genetic diversity among 44 Chinese maize open-pollinated varieties; （2） estimate the minimum number of alleles for construction of a stable dendrogram; and （3） trace the genetic relationships among local germplasm from different regions of China. In total, these 70 SSR primers yielded 292 alleles in 176 samples （4×44） analyzed. The number of alleles per locus was 4.17 on average and ranged from 2 to 8. The highest number of alleles per open-pollinated variety （55.25） was detected in Shanxi germplasm, which indicated that open-pollinated varieties from Shanxi possessed the largest genetic diversity among those from the five locations. The correlation coefficients between different genetic similarity matrices suggested that 200 alleles were sufficient for analysis of the genetic diversity of these 44 open-pollinated varieties. The cluster analysis showed that 44 open-pollinated varieties collected from three growing regions in China were accurately classified into three groups that were highly consistent with their geographic origins, and there is no correlation between GS and geographic distance in this study.展开更多
陆地棉皱缩叶突变体是本项目组自主发现的一种自然突变体。前期对其表型性状的观察发现该突变体的农艺性状有别于前人已报道的皱叶突变体;通过陆陆杂交世代群体对其遗传规律的研究表明,皱缩叶突变性状是受一对完全隐性基因wr3控制的质...陆地棉皱缩叶突变体是本项目组自主发现的一种自然突变体。前期对其表型性状的观察发现该突变体的农艺性状有别于前人已报道的皱叶突变体;通过陆陆杂交世代群体对其遗传规律的研究表明,皱缩叶突变性状是受一对完全隐性基因wr3控制的质量性状。文章以皱叶突变自交系L037和海7124为亲本配置组合得到的海陆杂交F2为作图群体,利用本实验室遴选的平均覆盖棉花26对染色体上的234对SSR引物(每染色体相对等距离分布9对引物),通过对双亲以及近等基因池的筛选,共得到12对多态性引物。用这些引物检测F2作图群体每个单株的标记基因型,经Join Map 4.0分析显示,位于Chr.21的引物BNL3279与目的基因连锁,二者间的遗传距离为28.7 c M。随后对Chr.21上的其他引物进一步筛选,共得到16对与目的基因连锁的标记,其中与目的基因距离最近的标记NAU3740的遗传距离为4.8 c M,另一侧标记cgr5428的遗传距离为10.4 c M。由此推定,皱缩叶突变体基因wr3在棉花第21染色体上。展开更多
本试验以明恢63(供体)/早熟豫6(受体)的BC4F2分离群体为材料,采用BSA(Bulked segregation analysis)法,对控制水稻抽穗期分离的基因进行SSR分子标记定位。BC4F2出现抽穗期分离,早抽穗植株为253株,晚抽穗植株为657株,χ2=3.66<P0.05=3...本试验以明恢63(供体)/早熟豫6(受体)的BC4F2分离群体为材料,采用BSA(Bulked segregation analysis)法,对控制水稻抽穗期分离的基因进行SSR分子标记定位。BC4F2出现抽穗期分离,早抽穗植株为253株,晚抽穗植株为657株,χ2=3.66<P0.05=3.84,符合1∶3的孟德尔分离比,表明F2群体的抽穗期分离受一对等位基因控制,晚抽穗性状为显性。以明恢63×早熟豫6的BC4F2分离群体的253株隐性单株为定位群体,将该抽穗基因(暂时命名为Hd6-f1)定位在水稻第6染色体分子标记RM19771与RM527之间,遗传距离分别为0.2 c M和2.9 c M,与RM19780共分离。展开更多
In recent years, Edwardsiella tarda has become one of the most deadly pathogens of Japanese fl ounder( Paralichthys olivaceus), causing serious annual losses in commercial production. In contrast to the rapid advances...In recent years, Edwardsiella tarda has become one of the most deadly pathogens of Japanese fl ounder( Paralichthys olivaceus), causing serious annual losses in commercial production. In contrast to the rapid advances in the aquaculture of P. o livaceus, the study of E. tarda resistance-related markers has lagged behind, hindering the development of a disease-resistant strain. Thus, a marker-trait association analysis was initiated, combining bulked segregant analysis(BSA) and quantitative trait loci(QTL) mapping. Based on 180 microsatellite loci across all chromosomes, 106 individuals from the F1333(♀: F0768 ×♂: F0915)(Nomenclature rule: F+year+family number) were used to detect simple sequence repeats(SSRs) and QTLs associated with E. tarda resistance. After a genomic scan, three markers(Scaffold 404-21589, Scaffold 404-21594 and Scaffold 270-13812) from the same linkage group(LG)-1 exhibited a signifi cant difference between DNA, pooled/bulked from the resistant and susceptible groups( P <0.001). Therefore, 106 individuals were genotyped using all the SSR markers in LG1 by single marker analysis. Two different analytical models were then employed to detect SSR markers with different levels of signifi cance in LG1, where 17 and 18 SSR markers were identifi ed, respectively. Each model found three resistance-related QTLs by composite interval mapping(CIM). These six QTLs, designated q E1–6, explained 16.0%–89.5% of the phenotypic variance. Two of the QTLs, q E-2 and q E-4, were located at the 66.7 c M region, which was considered a major candidate region for E. tarda resistance. This study will provide valuable data for further investigations of E. tarda resistance genes and facilitate the selective breeding of disease-resistant Japanese fl ounder in the future.展开更多
茎瘤芥先期抽薹给榨菜产量带来极大损失,是当前影响榨菜产业快速健康发展的主要因素之一。本研究采用茎瘤芥极早抽薹材料‘92’和极晚抽薹材料‘203’配制杂交组合,自交获得F2代群体,根据集团分离分析法,运用600对芸薹属SSR共有引物,进...茎瘤芥先期抽薹给榨菜产量带来极大损失,是当前影响榨菜产业快速健康发展的主要因素之一。本研究采用茎瘤芥极早抽薹材料‘92’和极晚抽薹材料‘203’配制杂交组合,自交获得F2代群体,根据集团分离分析法,运用600对芸薹属SSR共有引物,进行茎瘤芥抽薹性状基因连锁的分子标记筛选。最终得到1个SSR标记Ol12-D09在早抽薹基因池中扩增出特征条带,而晚抽薹基因池中无特征条带,经F2代单株验证发现与茎瘤芥早抽薹基因紧密连锁,根据Kosambi函数估算其连锁距离为10.9 c M。本研究结果筛选的SSR标记可用于茎瘤芥先期抽薹的分子标记辅助育种,并为茎瘤芥耐抽薹品种的选育提供理论依据。展开更多
文摘采取混合取样策略,利用荧光SSR技术对来源于我国7个省(自治区)的90份糯玉米地方品种和6个标准测验种自交系基因组的31个简单序列重复(SSR)位点进行了分析。在90个糯玉米地方品种中,共检测出216个等位变异,每个位点检测出2～12个,平均6.97个,多态性信息量(PIC,polymorphic information content)为0.67,标记指数(MI,marker index)为4.92。可初步将90份糯玉米地方品种划为3个类群,其中,广西和贵州的糯玉米地方品种的遗传多样性相对更丰富。
文摘通过对抗蚜小麦品种正科1号×感蚜品种石4185的F2分离群体(495株)进行田间自然抗蚜调查,发现正科1号的抗蚜虫性状受显性单基因控制,鉴定出的这个显性抗蚜基因,暂定名为dnY。运用分离群体分组法(BSA)筛选到3个在抗感亲本间表现多态性的SSR标记(Xwms350、Xgwm437、Xgwm44);进一步将该基因定位于7DS上,距离该基因最近的标记为Xgwm44,遗传距离3.29 c M。同时讨论了基因dnY在小麦遗传改良以桨标记在抗蚜基因标记辅助选择中的作用。
基金supported by the National Natural Science Foundation of China (30571169)the Earmarked Fund for Modern Agro-Industry Technology Research System of Maize, Ministry of Agriculture, China (2006-G3)
文摘Bulk-SSR method was used to analyze the genetic diversity of 44 open-pollinated varieties collected from Henan, Shandong, Shanxi, and Jilin provinces and Guangxi Zhuang Autonomous Region, China using 70 pairs of SSR primers. The purposes of this study were to （1） compare the genetic diversity among 44 Chinese maize open-pollinated varieties; （2） estimate the minimum number of alleles for construction of a stable dendrogram; and （3） trace the genetic relationships among local germplasm from different regions of China. In total, these 70 SSR primers yielded 292 alleles in 176 samples （4×44） analyzed. The number of alleles per locus was 4.17 on average and ranged from 2 to 8. The highest number of alleles per open-pollinated variety （55.25） was detected in Shanxi germplasm, which indicated that open-pollinated varieties from Shanxi possessed the largest genetic diversity among those from the five locations. The correlation coefficients between different genetic similarity matrices suggested that 200 alleles were sufficient for analysis of the genetic diversity of these 44 open-pollinated varieties. The cluster analysis showed that 44 open-pollinated varieties collected from three growing regions in China were accurately classified into three groups that were highly consistent with their geographic origins, and there is no correlation between GS and geographic distance in this study.
文摘陆地棉皱缩叶突变体是本项目组自主发现的一种自然突变体。前期对其表型性状的观察发现该突变体的农艺性状有别于前人已报道的皱叶突变体;通过陆陆杂交世代群体对其遗传规律的研究表明,皱缩叶突变性状是受一对完全隐性基因wr3控制的质量性状。文章以皱叶突变自交系L037和海7124为亲本配置组合得到的海陆杂交F2为作图群体,利用本实验室遴选的平均覆盖棉花26对染色体上的234对SSR引物(每染色体相对等距离分布9对引物),通过对双亲以及近等基因池的筛选,共得到12对多态性引物。用这些引物检测F2作图群体每个单株的标记基因型,经Join Map 4.0分析显示,位于Chr.21的引物BNL3279与目的基因连锁,二者间的遗传距离为28.7 c M。随后对Chr.21上的其他引物进一步筛选,共得到16对与目的基因连锁的标记,其中与目的基因距离最近的标记NAU3740的遗传距离为4.8 c M,另一侧标记cgr5428的遗传距离为10.4 c M。由此推定,皱缩叶突变体基因wr3在棉花第21染色体上。
文摘本试验以明恢63(供体)/早熟豫6(受体)的BC4F2分离群体为材料,采用BSA(Bulked segregation analysis)法,对控制水稻抽穗期分离的基因进行SSR分子标记定位。BC4F2出现抽穗期分离,早抽穗植株为253株,晚抽穗植株为657株,χ2=3.66<P0.05=3.84,符合1∶3的孟德尔分离比,表明F2群体的抽穗期分离受一对等位基因控制,晚抽穗性状为显性。以明恢63×早熟豫6的BC4F2分离群体的253株隐性单株为定位群体,将该抽穗基因(暂时命名为Hd6-f1)定位在水稻第6染色体分子标记RM19771与RM527之间,遗传距离分别为0.2 c M和2.9 c M,与RM19780共分离。
基金Supported by the National Natural Science Foundation of China(No.31461163005)the Taishan Scholar Project of Shandong Province
文摘In recent years, Edwardsiella tarda has become one of the most deadly pathogens of Japanese fl ounder( Paralichthys olivaceus), causing serious annual losses in commercial production. In contrast to the rapid advances in the aquaculture of P. o livaceus, the study of E. tarda resistance-related markers has lagged behind, hindering the development of a disease-resistant strain. Thus, a marker-trait association analysis was initiated, combining bulked segregant analysis(BSA) and quantitative trait loci(QTL) mapping. Based on 180 microsatellite loci across all chromosomes, 106 individuals from the F1333(♀: F0768 ×♂: F0915)(Nomenclature rule: F+year+family number) were used to detect simple sequence repeats(SSRs) and QTLs associated with E. tarda resistance. After a genomic scan, three markers(Scaffold 404-21589, Scaffold 404-21594 and Scaffold 270-13812) from the same linkage group(LG)-1 exhibited a signifi cant difference between DNA, pooled/bulked from the resistant and susceptible groups( P <0.001). Therefore, 106 individuals were genotyped using all the SSR markers in LG1 by single marker analysis. Two different analytical models were then employed to detect SSR markers with different levels of signifi cance in LG1, where 17 and 18 SSR markers were identifi ed, respectively. Each model found three resistance-related QTLs by composite interval mapping(CIM). These six QTLs, designated q E1–6, explained 16.0%–89.5% of the phenotypic variance. Two of the QTLs, q E-2 and q E-4, were located at the 66.7 c M region, which was considered a major candidate region for E. tarda resistance. This study will provide valuable data for further investigations of E. tarda resistance genes and facilitate the selective breeding of disease-resistant Japanese fl ounder in the future.
文摘茎瘤芥先期抽薹给榨菜产量带来极大损失,是当前影响榨菜产业快速健康发展的主要因素之一。本研究采用茎瘤芥极早抽薹材料‘92’和极晚抽薹材料‘203’配制杂交组合,自交获得F2代群体,根据集团分离分析法,运用600对芸薹属SSR共有引物,进行茎瘤芥抽薹性状基因连锁的分子标记筛选。最终得到1个SSR标记Ol12-D09在早抽薹基因池中扩增出特征条带,而晚抽薹基因池中无特征条带,经F2代单株验证发现与茎瘤芥早抽薹基因紧密连锁,根据Kosambi函数估算其连锁距离为10.9 c M。本研究结果筛选的SSR标记可用于茎瘤芥先期抽薹的分子标记辅助育种,并为茎瘤芥耐抽薹品种的选育提供理论依据。
