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Genetic dissection of a thousand-grain weight quantitative trait locus on rice chromosome 1

Chinese Science Bulletin 2008年第15期53卷 2326-2332页

作者： YU ShouWu yang changdeng FAN Yeyang ZHUANG JieYun LI XiMing State Key Laboratory of Rice Science Chinese National Center for Rice Improvement China National Rice Research InstituteHangzhou 310006 China

Thousand-grain weight (TGWT) is an important factor affecting grain yield as well as grain quality in rice. A quantitative trait locus (QTL) qTGWT1-1 for TGWT was detected previously near DNA marker RG532 on the short arm of chromosome 1 in a recombinant inbred line (RIL) population derived from the indica-indica rice cross Zhengshan97B (ZS97B)/Milyang46 (MY46). In this study, two residual het-erozygous lines (RHLs), Ch1 and Ch2, derived from the ZS97B/MY46 RIL F7 population, were used to develop two F6 populations, RIL-1 and RIL-2. The genome of Ch1 and Ch2 contains a heterozygous region flanked by RM1―RM3746 and RM151―RM243 on the short arm of chromosome 1, respectively, but is homozygous in other regions. Two tightly linked QTLs, Gw1-1 and Gw1-2, with the same additive direction and similar effect on TGWT, were detected in the region of QTL qTGWT1-1 in population RIL-2. No QTL was detected in the population RIL-1. Four individual RHLs from the population RIL-2 carrying heterozygous segments flanked by RM151―RM10404, RM10381―RM243, RM10435―RM259 and RM10398―RM5359, respectively, were chosen to develop four F2 populations. Ten maternal homozy-gotes and 10 paternal homozygotes were selected from each of the four F2 populations derived from the four RHLs. The four sets of near isogenic lines (NILs) were grown for phenotyping of TGWT and delimitation of Gw1-1 and Gw1-2. Results showed that Gw1-1 and Gw1-2 were located in the intervals RM10376―RM10398 and RM10404―RM1344 which cover 392.9 and 308.5 kb regions, respectively. The enhancing alleles were from ZS97B at both loci, and no significant interactions were detected. Genetic dissection of Gw1-1 and Gw1-2 has laid a foundation for their cloning and molecular breeding of grain yield and quality in rice.

关键词：水稻遗传基因染色体线粒体 QTL

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Identification of Stable Quantitative Trait Loci for Sheath Blight Resistance Using Recombinant Inbred Line

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Rice science 2019年第5期26卷 331-338页

作者： CHEN Yuan ZENG Yuxiang JI Zhijuan LIANG Yan WEN Zhihua yang changdeng State Key Laboratory of Rice Biology China National Rice Research Institute

To identify stable quantitative trait loci(QTLs)responsible for sheath blight resistance,a recombinant inbred line mapping population consisting of 219 lines was developed by crossing Lemont and yangdao *** disease rating,average lesion length,maximum disease rating and maximum lesion length were assayed in six different environments.A total of 128 minor effect QTLs were detected by multiple interval *** QTLs explained less than 11.2%of the phenotypic variations individually,and 106 QTLs were clustered in 20 QTL-rich regions/putative *** QTL×environment interactions were detected at three putative loci(qSBR11.1,qSBR11.2 and qSBR11.3),indicating that these three loci were not *** other 17 stable loci(qSBR1.1,qSBR1.2,qSBR2.1,qSBR2.3,qSBR3.1,qSBR3.2,qSBR3.5,qSBR3.6,qSBR5.1,qSBR7.1,qSBR8.1,qSBR9.1,qSBR9.2,qSBR9.3,qSBR12.1,qSBR12.2 and qSBR12.4)provided a foundation for marker-assisted selection in *** of allelic effect on the 20 putative loci identified 7 highly stable loci,including qSBR3.2,qSBR7.1,qSBR8.1,qSBR9.2,qSBR9.3,qSBR12.1 and qSBR12.2.

关键词： rice sheath blight resistance quantitative trait locus recombinant inbred line

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Mapping QTLs for heading synchrony in a doubled haploid population of rice in two environments

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Journal of Genetics and Genomics 2009年第5期36卷 297-304页

作者： Liangyong Ma changdeng yang Dali Zeng Jing Cai Ximing Li Zhijuan Ji Yingwu Xia Qian Qian Jinsong Bao State Key Lab of Rice Biology China National Rice Research Institute Hangzhou 310006 China Key Laboratory of Zhejiang Province and Chinese Ministry of Agriculture for Nuclear-Agricultural Sciences Institute of Nuclear Agricultural Sciences Zhejiang University Hangzhou 310029 China

Simultaneous heading of plants within the same rice variety, also refer to heading synchrony, is an important factor that affects simultaneous ripening of the variety. Understanding of the genetic basis of heading synchrony may contribute to molecular breeding of rice with simultaneous heading and ripening. In the present study, a doubled haploid （DH） population, derived from a cross between Chunjiang 06 and TN1 was used to analyze quantitative trait locus （QTL） for heading synchrony related traits, i.e., early heading date （EHD）, late heading date （LHD）, heading asynchrony （HAS）, and tiller number （PN）. A total of 19 QTLs for four traits distributed on nine chromosomes were detected in two environments. One QTL, qHAS-8 for HAS, explained 27.7% of the phenotypic variation, co-located with the QTLs for EHD and LHD, but it was only significant under long-day conditions in Hangzhou, China. The other three QTLs, qHAS-6, qHAS-9, and qHAS-10, were identified under short-day conditions in Hainan, China, each of which explained about 11% of the phenotypic variation. Two of them, qHAS-6 and qHAS-9, were co-located with the QTLs for EHD and LHD. Two QTLs, qPN-4 and qPN-5 for PN, were detected in Hangzhou, and qPN-5 was also detected in Hainan. However, none of them was co-located with QTLs for EHD, LHD, and HAS, suggesting that PN and HAS were controlled by different genetic factors. The results of this study can be useful in marker assisted breeding for improvement of heading synchrony.

关键词： rice doubled haploid population heading synchrony quantitative trait loci (QTL)

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Quantitative Trait Loci for Panicle Layer Uniformity Identified in Doubled Haploid Lines of Rice in Two Environments

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Journal of Integrative Plant Biology 2009年第9期51卷 818-824页

作者： Liangyong Ma Jinsong Bao Longbiao Guo Dali Zeng Ximing Li Zhijuan Ji Yingwu Xia changdeng yang Qian Qian State Key Laboratory of Rice Biology China National Rice Research Institute Hangzhou 310006 China Key Laboratory of Zhejiang Province and Chinese Ministry of Agriculture for Nuclear-Agricultural Sciences Institute of Nuclear Agricultural Sciences Zhejiang University Hua Jiachi Campus Hangzhou 310029 China

Uniformity of stem height in rice directly affects crop yield potential and appearance, and has become a vital index for rice improvement. In the present study, a doubled haploid （DH） population, derived from a cross between japonica rice Chunjiang 06 and indica rice TN1 was used to analyze the quantitative trait locus （QTL） for three related traits of paniclelayer-uniformity; that is, the tallest panicle height, the lowest panicle height and panicle layer disuniforrnity in two locations：Hangzhou （HZ） and Hainan （HN）. A total of 16 QTLs for three traits distributed on eight chromosomes were detected in two different environments. Two QTLs, qTPH-4 and qTPH-8 were co-located with the QTLs for qLPH-4 and qLPH-8, which were only significant in the HZ environment, whereas the qTPH-6 and qLPH-6 located at the same interval were only significant in the HN environment. Two QTLs, qPLD-10.1 and qPLD-10.2, were closely linked to qTPH-10, and they might have been at the same locus. One QTL, qPLD-3, was detected in both environments, explaining more than 23% of the phenotypic variations. The CJ06 allele of qPLD-3 could increase the panicle layer disuniformity by 9.23 and 4.74 cm in the HZ and HN environments. Except for qPLD-3, almost all other QTLs for the same trait were detected only in one environment, indicating that these three traits were dramatically affected by environmental factors. The results may be useful for elucidation of the molecular mechanism of panicle-layer-uniformity and marker assisted breeding for super-rice.

关键词： double haploid population panicle layer uniformity plant height quantitative trait loci rice.

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Analysis of restoring gene in Heizhenmi

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Chinese Rice Research Newsletter 1994年第2期2卷 8-9页

作者： yang changdeng ZHAO Chengzhang QI Xiufang Wu Lianbin CNRRI,Hangzhou 310006,China

The purple pigment is controlled by three domi-nant *** to the theory ofdominance-super dominance in Fgeneration, breeding purple black hybrid rice can be an effec-tive way to overcome lower yield and weak resist-ance... 详细信息

关键词： Analysis of restoring gene in Heizhenmi line gene

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The effect of dehydration on plant regeneration and some physiology characters in rice calli

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Chinese Rice Research Newsletter 1997年第2期5卷 7-8页

作者： ZHAO Chengzhang WU Lianbin yang changdeng QI Xiufang CNRRI,Hangzhou 310006,China

The plant regeneration frequencies of ealli fromplant tissue and cell culture,especially that of thecalli from rice tissue culture and rice anther cul-ture,and that of the foreign-DNA-transfor-mation-derived rice calli is very low(usually 10-15%).It is therefor very important to improve theplant regeneration frequency of rice calli.A1-

关键词： The effect of dehydration on plant regeneration and some physiology characters in rice calli

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Effects of some physical and chemical treatments on the breakdown of dormant seeds of rice

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Rice Science 1996年第3期 7-8页

作者： SHOU Jianyao Zhuji Agri Tech Extension Center,Zhuji 311800,China WU Lianbin and yang changdeng,CNR-RI,Hangzhou 310006,China

It is desirable to obtain an early-rice varietywith deep dormancy characteristics because inthe southern rice cultivation area of China,thesprouting on panicle of early-season rice oftenoccurs in rainy harvest ***,the... 详细信息

关键词： Effects of some physical and chemical treatments on the breakdown of dormant seeds of rice HCI

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水稻恶苗病抗性研究进展

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中国水稻科学 2021年第1期35卷 1-10页

作者：季芝娟曾宇翔梁燕杨长登中国水稻研究所水稻生物学国家重点实验室杭州310006

恶苗病是水稻的主要病害,该病主要通过种子带菌传播,可对水稻的生产造成严重危害。近来国内外学者在水稻恶苗病抗性种质资源的筛选、抗性遗传、QTL定位和基因挖掘等方面取得了一定的进展。本文简要概述了水稻恶苗病菌分类和特征,比较了... 详细信息

恶苗病是水稻的主要病害,该病主要通过种子带菌传播,可对水稻的生产造成严重危害。近来国内外学者在水稻恶苗病抗性种质资源的筛选、抗性遗传、QTL定位和基因挖掘等方面取得了一定的进展。本文简要概述了水稻恶苗病菌分类和特征,比较了不同恶苗病抗性鉴定方法,分析了当前定位的水稻恶苗病抗性QTL数目和染色体分布,探讨了转录组学和蛋白组学技术在水稻恶苗病抗性基因挖掘中的最新研究成果,并对该领域未来的研究方向进行了展望,为今后深入开展恶苗病抗性研究和抗恶苗病水稻育种提供参考。

关键词：水稻恶苗病抗性藤仓镰孢菌 QTL定位

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水稻第1染色体短臂粒长和粒宽QTL的精细定位

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中国水稻科学 2008年第5期22卷 465-471页

作者：余守武樊叶杨杨长登李西明中国水稻研究所水稻生物学国家重点实验室/国家水稻改良中心浙江杭州310006

以第1染色体短臂RM1-RM3746和RM151-RM243区间内呈杂合、背景基本纯合的2个水稻剩余杂合体(RHL)衍生两个F6群体,将控制水稻粒长和粒宽的2个粒形QTL(qGL-1和qGW-1)定位于RM3746-RM243区间内。在此基础上,应用SSR标记检测,从其中1个群体... 详细信息

以第1染色体短臂RM1-RM3746和RM151-RM243区间内呈杂合、背景基本纯合的2个水稻剩余杂合体(RHL)衍生两个F6群体,将控制水稻粒长和粒宽的2个粒形QTL(qGL-1和qGW-1)定位于RM3746-RM243区间内。在此基础上,应用SSR标记检测,从其中1个群体中筛选到杂合区间分别为RM151-RM10404、RM10398-RM5359、RM10435-RM259和RM10381-RM243的4个单株,应用SSR标记进一步检测4套F2群体,从每套F2群体中分别筛选到母本珍汕97B和父本密阳46纯合型材料各10株,自交获得4套近等基因系材料并考查其粒长和粒宽。利用交迭重组染色体片段代换系分析法,将控制粒长和粒宽的QTL(qGL-1和qGW-1)界定于437.5kb的RM10390-RM1344区间和392.9kb的RM10376-RM10398区间,增效等位基因均来自母本珍汕97B,表明qGL-1和qGW-1是紧密连锁的不同座位。

关键词：粒形剩余杂合体近等基因系数量性状座位水稻精细定位

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273份水稻种质资源的遗传多样性、群体结构与连锁不平衡分析

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中国水稻科学 2021年第2期35卷 130-140页

作者：董俊杰曾宇翔季芝娟梁燕杨长登中国水稻研究所水稻生物学国家重点实验室杭州310006

【目的】评估273份水稻种质资源的遗传多样性和群体结构,为今后利用这些水稻种质资源进行遗传育种和关联分析提供参考。【方法】利用214个分子标记对来自14个国家的273份水稻地方品种和育种材料进行基因型检测,分析其遗传多样性、群体... 详细信息

【目的】评估273份水稻种质资源的遗传多样性和群体结构,为今后利用这些水稻种质资源进行遗传育种和关联分析提供参考。【方法】利用214个分子标记对来自14个国家的273份水稻地方品种和育种材料进行基因型检测,分析其遗传多样性、群体结构、连锁不平衡程度。【结果】群体结构分析将供试群体划分为2个亚群(SG1、SG2)以及1个混合群(AD),聚类分析和主成分分析结果与群体结构分析结果一致;遗传多样性分析结果显示,214个标记共检测到524个等位变异,变幅为2~5个,平均遗传多样性指数为0.44,平均多态性信息含量(PIC)为0.355,SG2群遗传多样性指数和PIC高于SG1群;分子方差分析表明34%的变异来源于种群内,66%的变异来源于种群间,SG1与SG2群体间存在显著的遗传分化(Fst=0.725,P<0.01);连锁不平衡分析结果显示,整个群体中存在较高程度连锁不平衡,平均r2为0.33,SG1和SG2中连锁不平衡衰减到75%以下所延伸的最小距离分别为13.7 Mb和90.5 kb。【结论】273份水稻种质资源群体内具有丰富的遗传变异,该群体适合通过关联作图来挖掘优异等位基因。

关键词：水稻种质资源遗传多样性群体结构连锁不平衡

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