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quantitative trait loci mapping of Maize Yield and Its Components Under Different Water Treatments at Flowering Time

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Journal of Integrative Plant Biology 2006年第10期48卷 1233-1243页

作者： Gui-He Lu Ji-Hua Tang Jian-Bing Yan Xi-Qing Ma Jian-Sheng Li Shao-Jiang Chen Jian-Cang Ma Zhan-Xian Liu Li-Zhu E Yi-Rong Zhang Jing-Rui Dai The National Maize Improvement Center of China China Agricultural University Beijing 100094 China Industrial Crop Institute Shanxi Academy of Agricultural Sciences Fenyang 032200 Shanxi China Zhangye Maize Seed Farm Zhangye 734024 Gansu China

Drought or water stress is a serious agronomic problem resulting in maize （Zea mays L.） yield loss throughout the world. Breeding hybrids with drought tolerance is one important approach for solving this problem. However, lower efficiency and a longer period of breeding hybrids are disadvantages of traditional breeding programs. It is generally recognized that applying molecular marker techniques to traditional breeding programs could improve the efficiency of the breeding of drought-tolerant maize. To provide useful information for use in studies of maize drought tolerance, the mapping and tagging of quantitative trait loci （QTL） for yield and its components were performed in the present study on the basis of the principle of a mixed linear model. Two hundred and twenty-one recombinant inbred lines （RIL） of Yuyu 22 were grown under both well-watered and water-stressed conditions. In the former treatment group, plants were well irrigated, whereas those in the latter treatment group were stressed at flowering time. Ten plants of each genotype were grown in a row that was 3.00 m × 0.67 m （length × width）. The results show that a few of the QTL were the same （one additive QTL for ear length, two additive QTL and one pair of epistatic QTL for kernel number per row, one additive QTL for kernel weight per plant）, whereas most of other QTL were different between the two different water treatment groups. It may be that genetic expression differs under the two different water conditions. Furthermore, differences in the additive and epistatic QTL among the traits under water-stressed conditions indicate that genetic expression also differs from trait to trait. Major and minor QTL were detected for the traits, except for kernel number per row, under water-stressed conditions. Thus, the genetic mechanism of drought tolerance in maize is complex because the additive and epistatic QTL exist at the same time and the major and minor QTL all contribute to phenotype under water-stres

关键词： flowering time maize (Zea mays) quantitative trait loci mapping water treatment yield and its components

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A composite method for mapping quantitative trait loci without interference of female achiasmatic and gender effects in silkworm,Bombyx mori

A composite method for mapping quantitative trait loci witho...

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中国蚕学会第九届青年学术研讨会

作者： Chunlin Li Weidong Zuo Xiaoling Tong Hai Hu Liang Qiao Jiangbo Song Gao Xiong Rui Gao Fangyin Dai Cheng Lu State Key Laboratory of Silkworm Genome Biology Southwest University Key Laboratory of Sericulture biology and Genetic breeding Agricultural MinistryCollege of BiotechnologySouthwest University Institute of Entomology and Molecular Biology College of Life SciencesChongqing Normal University

The silkworm,Bombyx mori,is an economically important insect that was domesticated more than 5000 years *** major economic traits focused on by breeders are quantitative traits,and an accurate and efficient QTL mapping method is necessary to explore their genetic ***,current widely used QTL mapping models are not well suited for silkworm because they ignore female achiasmate and gender *** this study,we propose a composite method combining rational population selection and special mapping methods to map QTL in *** determining QTL for cocoon shell weight（CSW）,we demonstrated the effectiveness of this *** the CSW mapping process,only 56 markers were used and five loci or chromosomes were detected,more than in previous ***,loci on chromosomes 1 and 11 dominated and accounted for 35.10% and 15.03% of the phenotypic variance *** previous studies,epistasis was detected between loci on chromosomes 11 and *** mapping results demonstrate the power and convenience of this method for QTL mapping in silkworm,and this method may inspire the development of similar approaches for other species with special genetic characteristics.

关键词： Bombyx mori quantitative trait loci mapping Female achiasmate gender effects Cocoon shell weight

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A composite method for mapping quantitative trait loci without interference of female achiasmatic and gender effects in silkworm, Bombyx mori

A composite method for mapping quantitative trait loci witho...

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第十二届家（柞）蚕遗传育种暨良种繁育学术研讨会

作者： C.Li W.Zuo X.Tong H.Hu L.Qiao J.Song G.Xiong R.Gao F.Dai C.Lu State Key Laboratory of Silkworm Genome Biology Southwest University Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry Southwest University Institute of Entomology and Molecular Biology College of Life Sciences Chongqing Normal University

The silkworm, Bombyx mori, is an economically important insect that was domesticated more than 5000 years ago. Its major economic traits focused on by breeders are quantitative traits, and an accurate and efficient QTL mapping method is necessary to explore their genetic architecture. However, current widely used QTL mapping models are not well suited for silkworm because they ignore female achiasmate and gender effects. In this study, we propose a composite method combining rational population selection and special mapping methods to map QTL in silkworm. By determining QTL for cocoon shell weight（CSW）, we demonstrated the effectiveness of this method. In the CSW mapping process, only 56 markers were used and five loci or chromosomes were detected, more than in previous studies. Additionally, loci on chromosomes 1 and 11 dominated and accounted for 35.10% and 15.03% of the phenotypic variance respectively. Unlike previous studies, epistasis was detected between loci on chromosomes 11 and 22. These mapping results demonstrate the power and convenience of this method for QTL mapping in silkworm, and this method may inspire the development of similar approaches for other species with special genetic characteristics.

关键词： Bombyx mori cocoon shell weight genetic architecture population selection quantitative trait loci mapping

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Unraveling waterlogging tolerance-related traits with QTL analysis in reciprocal intervarietal introgression lines using genotyping by sequencing in rapeseed(Brassica napus L.)

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Journal of Integrative Agriculture 2020年第8期19卷 1974-1983页

作者： DING Xiao-yu XU Jin-song HUANG He QIAO Xing SHEN Ming-zhen CHENG Yong ZHANG Xue-kun Key Laboratory of Oil Crop Biology and Genetic Improvement Ministry of Agriculture and Rural Affairs/Oil Crops Research InstituteChinese Academy of Agricultural SciencesWuhan 430070P.R.China

Soil waterlogging is a major environmental stress that suppresses the growth and productivity of rapeseed(Brassica napus L.).Natural genetic variations in waterlogging tolerance(WT)were observed but no QTL mapping has been done for WT related traits in *** this study,QTL associated with three WT related traits including relative root length(RRL),relative hypocotyl length(RHL)and relative fresh weight(RFW)were dissected using a set of reciprocal introgression lines(ILs)derived from the cross GH01×ZS9,which showed significant difference in ***-by-sequencing(GBS)of the populations were performed,totally 1468 and 1450 binned SNPs were identified for GIL(GH01 as the recurrent parent)and ZIL(ZS9 as the recurrent parent)population,respectively.A total of 66 distinct QTLs for WT at the seedling establishment stage including 31 for RRL,17 for RHL and 18 for RFW were *** the 66 QTLs,20(29.4%)QTLs were detected in both genetic backgrounds and then they were integrated into six QTL clusters,which can be targeted in rapeseed breeding for improvement of WT through marker-assisted selection(MAS).Based on the physical positions of SNPs and the functional annotation of the Arabidopsis thaliana genome,56 genes within the six QTL cluster regions were selected as preliminary candidate genes,then the resequencing and transcriptome information about parents were applied to narrow the extent of candidate *** genes were determined as candidates for the six QTL clusters,some of them involved in RNA/protein degradation,most of them involved in oxidation-reduction *** findings provided genetic resources,candidate genes to address the urgent demand of improving WT in rapeseed breeding.

关键词： Brassica napus candidate genes marker-assisted selection quantitative trait loci mapping waterlogging tolerance

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Morphine analgesia in male inbred genetic diversity mice recapitulates the among-individual variance in response to morphine in humans

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Animal Models and Experimental Medicine 2022年第3期5卷 288-296页

作者： Yin Yang Bowen Guan Qiang Wei Wei Wang Aimin Meng Key Laboratory of Human Disease Comparative Medicine Ministry of HealthBeijing Engineering Research Center for Laboratory Animal Models of Human Critical DiseasesInstitute of Laboratory Animal SciencesChinese Academy of Medical Sciences(CAMS)and Peking Union Medical College(PUMC)BeijingChina Department of Physiology and Neurobiology School of Basic Medical SciencesZhengzhou UniversityZhengzhouChina

Morphine is a widely used analgesic, but its use in clinical precision medicine is limited by the variance in response among individuals. Although previous studies have shown that individual differences in morphine can be explained in terms of pharmacodynamics and pharmacokinetics, genetic polymorphisms also play an important role. However, the genetic basis of different sensitivity and tolerance susceptibility to morphine remains ambiguous. Using 15 strains of inbred Genetic Diversity(GD) mice,a new resource with wide genetic and phenotypic variation, we demonstrated great variance in sensitivity to morphine analgesia and susceptibility to morphine tolerance between different GD strains. Among-i ndividual variance in response to morphine analgesia in the population can be modeled in GD mice. Two loci respectively may be associated with the among-i ndividual variance in morphine sensitivity and tolerance,confirming the role of genetic factors in among-i ndividual different responses to morphine. These results indicate that GD mice may be a potential tool for the identification of new biomarkers to improve the clinical administration of morphine.

关键词： inbred genetic diversity mice morphine analgesia morphine tolerance quantitative trait loci mapping

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