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Genetic effects and plant architecture influences on outcrossing rate in soybean

Journal of Integrative Agriculture 2019年第9期18卷 1971-1979页

作者： YAN Hao ZHANG Jing-yong ZHANG Chun-bao PENG Bao ZHANG Wei-long WANG Peng-nian DING Xiao-yang LIU Bao-hui FENG Xian-zhong ZHAO Li-mei Key Laboratory of Soybean Molecular Design Breeding Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun 130102P.R.China Soybean Research Institute Jilin Academy of Agricultural Sciences/National Engineering Research Center for SoybeanChangchun 130033P.R.China University of Chinese Academy of Sciences Beijing 100049P.R.China

outcrossing rate is an important determinant of cytoplasmic male sterile(CMS)breeding and hybrid seed production for heterosis in *** lines with a high outcrossing rate were screened for backcross breeding to obtain the high outcrossing rate maintenance B-lines and sterile *** in production practices will help to increase hybrid soybean *** this study,JLCMS82B and JLCMS89B were selected as parents for the construction of outcrossing rate segregation populations,and the progeny-array approach(PAA)and glyphosate resistant gene markers were used to determine outcrossing *** found that:(1)The outcrossing rate between JLCMS82B and JLCMS89B was significantly different;(2)the outcrossing rate of the F2 segregating populations was a quantitative trait,though whether an additive or epistatic effect exists required analysis with a triple test intersection analysis;(3)agronomic traits correlated with outcrossing rate;outcrossing rate was the highest with plant height of about 84 cm,lower number of plant branches,earlier flowering time,larger angle between the branches and the main stem,and with more divergent plant *** analysis between agronomic traits and outcrossing rate can effectively guide the screening of parents with a high outcrossing rate.

关键词： soybean outcrossing rate stem height branch number initial bloom date

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Genome-wide identification of agronomically important genes in outcrossing crops using OutcrossSeq

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Molecular Plant 2021年第4期14卷 556-570页

作者： Mengjiao Chen Weijuan Fan Feiyang Ji Hua Hua Jie Liu Mengxiao Yan Qingguo Ma Jiongjiong Fan Qin Wang Shufeng Zhang Guiling Liu Zhe Sun Changgeng Tian Fengling Zhao Jianli Zheng Qi Zhang Jiaxin Chen Jie Qiu Xin Wei Ziru Chen Peng Zhang Dong Pei Jun Yang Xuehui Huang Shanghai Key Laboratory of Plant Molecular Sciences College of Life SciencesShanghai Normal UniversityShanghai 200234China Shanghai Key Laboratory of Plant Functional Genomics and Resources Shanghai Chenshan Plant Science Research CenterChinese Academy of SciencesShanghai Chenshan Botanical GardenShanghai 201602China State Key Laboratory of Tree Genetics and Breeding Key Laboratory of Tree Breeding and Cultivation of the State Forestry and Grassland AdministrationResearch Institute of ForestryChinese Academy of ForestryBeijing 100091China Tai'an Academy of Agricultural Sciences Tai'an 271000ShandongChina National Genomics Data Center Bio-Med Big Data CenterCAS Key Laboratory of Computational BiologyCAS-MPG Partner Institute for Computational BiologyShanghai Institute of Nutrition and HealthChinese Academy of SciencesShanghai 200031China CAS Center for Excellence of Molecular Plant Sciences Institute of Plant Physiology and EcologyShanghai Institutes for Biological SciencesChinese Academy of SciencesShanghai 200233China These authors contributed equally to this article.

Many important crops(e.g.,tuber,root,and tree crops)are *** these crops,no inbred lines are available for genetic study and breeding because they are self-incompatible,clonally propagated,or have a long generation time,making the identification of agronomically important genes difficult,particularly in crops with a complex autopolyploid *** this study,we developed a method,OutcrossSeq,for mapping agronomically important loci in outcrossing crops based on whole-genome low-coverage resequencing of a large genetic population,and designed three computation algorithms in OutcrossSeq for different types of outcrossing *** applied OutcrossSeq to a tuberous root crop(sweet potato,autopolyploid),a tree crop(walnut tree,highly heterozygous diploid),and hybrid crops(double-cross populations)to generate high-density genotype maps for the outcrossing populations,which enable precise identification of genomic loci underlying important agronomic *** causative genes at these loci were detected based on functional *** together,our results indicate that OutcrossSeq is a robust and powerful method for identifying agronomically important genes in heterozygous species,including polyploids,in a cost-efficient *** OutcrossSeq software and its instruction manual are available for downloading at ***/tool/***.

关键词： genotyping genetic mapping outcrossing polyploid

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New Temperature Sensitive Genic Male Sterile Lines with Better outcrossing Ability for Production of Two-Line Hybrid Rice

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Rice science 2015年第1期22卷 49-52页

作者： S.J.ARASAKESARY S.MANONMANI R.PUSHPAM S.ROBIN Regional Agricultural Research and Development Center Iranamadu Junction Paddy Breeding Station Tamil Nadu Agricultural University

An investigation was carried out with three newly developed temperature sensitive genic male sterile （TGMS） lines for their floral traits, seed production potential and outcrossing ability in ten cross combinations. In the TGMS lines, fertile pollens had an average diameter of 0.89 mm while the sterile pollens was with 0.02 mm ***-29-150GY produced the biggest fertile pollens with 0.92 mm and other two lines produced relatively smaller pollens with 0.91 and 0.85 ram. Pollen fertility during the fertility reversion period was an average of 60.7%. TS-29-150GY had the maximum of 66.9% spikelet fertility whereas other two lines （TNAU18S and TNAU60S） had relatively lower spikelet fertility of 27.8% and 26.7%, respectively. Average of 17.00 g of seed yield was obtained in the TGMS lines during the fertility reversion period. TS-29- 150GY had the highest value of 21.20 g of seed yield while TNAU18S and TNAU60S produced 16.6 g and 13.2 g of seed yield, respectively. The low seed production ability of these three TGMS lines was attributed only to the environmental conditions prevailing during the period. All three TGMS lines had considerable outcrossing potential of 41.2%, 24.6% and 25.0%, respectively. The cross combinations viz. TNAU18S/IET21508 （36 g/plant）, TNAU18S/IET21044 （13 g/plant）, TNAU18S/IET21009 （26.5 g/plant）, TNAU60S/CB-09-106 （26.2 g/plant）, TNAU60S/IET21009 （14 g/plant） and TS29-150-GY/DRR 3306 （39.2 g/plant） showed perfect synchronization with acceptable hybrid seed yield, indicating suitability of TGMS system under Indian condition. Based on the outcrossing related traits viz. panicle exertion, angle of glume opening, stigma length and pollen size, TNAU18S was identified as the best, followed by TS-29-150GY.

关键词： temperature sensitive genic male sterile line outcrossing floral trait hybrid rice

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Application of an atmospheric gene flow model for assessing environmental risks from transgenic corn crops

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International Journal of Agricultural and Biological Engineering 2010年第3期3卷 36-42页

作者： Junming Wang Xiusheng Yang Department of Agricultural Sciences Tennessee State UniversityNashvilleTN 37209USA Department of Natural Resources Management and Engineering University of ConnecticutStorrsCT 06269-4087USA

Gene flow data from experiments under limited environmental conditions(*** speed and direction,atmospheric stability)have only provided limited information for gene flow risk *** is necessary to apply models to predict the gene flow under a complete set of possible environmental conditions to inform farmers,seed companies,government agencies,and researchers about the risks and potential prevention and precaution *** this paper,the previous validated gene flow model developed by the authors was used to predict gene flow from genetically modified(GM)corn *** model was used to simulate potential gene flow from GM corn sources of different sizes from one plant area of 0.1 m^(2) to an area 3.1×10^(6) m^(2) under normal weather *** addition,the model was also used to predict the potential gene flow for different source strengths,atmospheric conditions,buffer heights,buffer field sizes,and pollen settling speeds from 10,000 m^(2) *** model simulations have provided gene flow information for risk management under the above conditions and have shown that the source sizes,source strengths,buffer heights,buffer sizes,atmospheric conditions,and pollen settling speeds had important effects on gene *** the atmospheric conditions and pollen settling speeds cannot be controlled,choosing appropriate buffer heights and sizes will effectively prevent gene *** lost seed control is crucial to limit gene flow because even a GM corn plant can result in a grand total deposition flux of 646,272 grains/m^(2),an outcrossing ratio of 0.016,and outcrossed seed of 110 kernels/m^(2) at 0.8 m from the plant in the non-target field under normal atmospheric conditions.

关键词： model risk management crops corn pollen gene flow random walk outcrossing

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Potential Inbreeding in a Small Population of a Mass Flowering Species, <i>Xanthorrhoea johnsonii</i>(Xanthorrhoeaceae): Is Your Mother My Father?

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American Journal of Plant Sciences 2012年第3期3卷 303-312页

作者： Rachel King Jacinta M. Zalucki Department of Mathematics and Computing Faculty of Sciences University of Southern Queensland Toowoomba Australia School of Environment Griffith University Nathan Australia

Xanthorrhoea johnsonii is a long lived slow growing perennial understorey species, that produces a large quantity of passively dispersed seed every 3 - 5 years. Reproductive maturity is not reached until 20 - 30 years of age. The temporal asynchrony of the flowering event in this population was analogous to geographic isolation through fragmentation. A small population of plants flowering in isolation provided the opportunity to examine outcrossing rates, genetic diversity and the paternity of progeny at a small spatial scale (0.2 ha). The geographic location and physical characteristics of the adult plants were recorded, and both adults and their seed were sampled for genetic analysis. Four microsatellite loci were screened for genetic diversity and spatial structure analysis. A population outcrossing rate was estimated, as well as the number of paternal parents required to resolve the progeny multilocus genotypes. High genetic diversity was found in both adults and progeny with an estimated 97% outcrossing rate. All maternal lines required several paternal contributors, with no evidence of dominant paternal genotypes. Pollen transfer occurred between both geographically close and distant plants.

关键词： Xanthorrhoeaceae Inbreeding Mass Flowering Microsatellite Paternity outcrossing Pollen Dispersal Genetic Structure Isolated Population Xanthorrhoea johnsonii

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Genetic Diversity and Mating System Analysis of Pinus massoniana in Second-Generation Clonal Seed Orchard

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Chinese Forestry Science and Technology 2012年第3期11卷 52-53页

作者： Tan Xiaomei Zhou Zhichun Jin Guoqing Zhang Yi Research Institute of Subtropical Forestry Chinese Academy of Forestry Chongqing Academy of Forestry

A total 61 clone parents and 320 open-pollination progenies from 8 clone individuals were identified by 12 polymorphic SSR *** result showed that the level of genetic diversity in progeny population was the same as in maternal population, progeny population had all alleles detected in maternal population,and there were not obvious surplus phenomenon of homozygotes in progeny population (F= 0.046).The south crown had more strobili than the north crown,however the genetic diversity of the north crown strobili was not substantially *** progeny of neutral trees had the same level of genetic diversity as in the progeny of partial female trees,with the fixation index tended to be zero,which was accorded with Hardy-Weinberg *** multilocus outcrossing rate in the seed orchard was 1.097,and there was no significant inbreeding between parents(t_m-t_s= - 0.031).The multilocus outcrossing rate and singlelocus outcrossing rate in the south crown were higher than that in the north *** multilocus outcrossing rate of partial female trees was the same as in neutral trees,and the neutral tree had no obvious declining outcrossing rate with reduced proportion of female and male strobilus compared with partial female tree, with the fixation index tended to be *** progeny of the second generation clonal seed orchard still had rich genetic diversity,gene exchange among clones was relatively sufficient,and biparental inbreeding was not significant.

关键词： Pinus massoniana second generation seed orchard SSR genetic diversity outcrossing rate inbreeding index

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