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作物学报 ›› 2022, Vol. 48 ›› Issue (11): 2715-2723.doi: 10.3724/SP.J.1006.2022.12040

• 作物遗传育种·种质资源·分子遗传学 • 上一篇    下一篇

广西野生稻Y11抗白背飞虱QTL定位

杨明1(), 李丹婷2, 范德佳1, 谭嵩娟1, 程遐年1, 刘裕强1,*(), 万建民1,3   

  1. 1南京农业大学作物遗传与种质创新国家重点实验室, 江苏南京 210095
    2广西壮族自治区农业科学院水稻研究所, 广西南宁 530007
    3中国农业科学院作物科学研究所, 北京 100081
  • 收稿日期:2021-06-06 接受日期:2022-05-05 出版日期:2022-11-12 网络出版日期:2022-05-24
  • 通讯作者: 刘裕强
  • 作者简介:第一作者联系方式: E-mail: 2018101087@njau.edu.cn
  • 基金资助:
    本研究由国家重点研发计划项目(2017YFD0100400-01);国家自然科学基金项目(32088102);国家自然科学基金项目(32072030);江苏省重点研发计划项目(BE2019380)

Mapping of QTLs for resistance to white-backed planthopper in Guangxi wild rice Y11

YANG Ming1(), LI Dan-Ting2, FAN De-Jia1, TAN Song-Juan1, CHENG Xia-Nian1, LIU Yu-Qiang1,*(), WAN Jian-Min1,3   

  1. 1State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
    2Rice Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, Jiangsu, China
    3Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
  • Received:2021-06-06 Accepted:2022-05-05 Published:2022-11-12 Published online:2022-05-24
  • Contact: LIU Yu-Qiang
  • Supported by:
    The National Key Research and Development Program of China(2017YFD0100400-01);The National Natural Science Foundation of China(32088102);The National Natural Science Foundation of China(32072030);The Jiangsu Provincial Key Research Program(BE2019380)

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摘要：

白背飞虱是危害水稻生产最严重的害虫之一。培育抗性品种是防治白背飞虱最经济有效的措施。本研究发现广西野生稻‘Y11’高抗白背飞虱, ‘Y11’植株上白背飞虱的数量及存活率均显著低于感虫品种‘广恢998’, 表现出较强的排趋性和抗生性。为解析‘Y11’抗白背飞虱的遗传基础, 以‘Y11’为供体亲本, 籼稻品种‘广恢998’为轮回亲本, 构建了BC3F9回交重组自交系群体, 并完成了该群体白背飞虱苗期抗性鉴定及全基因组连锁图谱的构建, 进行了抗白背飞虱QTL (quantitative trait locus)检测。结果发现, 在水稻2号、6号和11号染色体上检测到3个抗性位点, 分别命名为qWBPH2Y11, qWBPH6Y11和qWBPH1Y11, 其LOD值分别为4.8、2.5和3.7, 分别解释表型变异的9.3%、2.3%和5.6%, 且3个QTL的抗性等位基因均来自于广西野生稻‘Y11’。进一步从BC3F9回交群体中挑选携带qWBPH2位点的家系继续与‘广恢998’回交2次, 经标记辅助选择, 获得了qWBPH2的近等基因系, 近等基因系的白背飞虱抗性显著高于背景亲本‘广恢998’。上述抗白背飞虱QTL的定位及近等基因系的构建, 为抗性基因克隆及通过分子标记辅助选择培育抗性品种奠定了基础。

关键词: 水稻, 白背飞虱, 数量性状基因座, 基因定位

Abstract:

White-backed planthopper (WBPH) is one of the most serious pests in rice production. Breeding resistant varieties is the most economical and effective strategy to control the white-backed planthopper. In this study, we found that Guangxi wild rice variety ‘Y11’ had high resistance to white-backed planthopper. The number and survival rate of WBPH were significantly less than the susceptible variety ‘Guanghui 998’. These results showed that ‘Y11’ displayed higher antixenosis and antibiosis against WBPH. Subsequently, ‘Y11’ was as the donor parent and an indica cultivar ‘Guanghui 998’ was as the recurrent parent by continuous backcrossing and selfing to obtain the BC3F9 population. Furthermore, to identify the quantitative trait locus (QTL) for white-backed planthopper resistance, we completed the evaluation of this population for WBPH resistance at seedling stage and constructed the genome-wide linkage map. Three QTLs were detected on the three different rice chromosomes, and designed as qWBPH2Y11, qWBPH6Y11, and qWBPH11Y11, respectively. The LOD values were 4.8, 2.5, and 3.7, which accounted for 9.3%, 2.3%, and 5.6% of the phenotypic variation, respectively. All of the resistance alleles were from resistant parent ‘Y11’. Plant harboring qWBPH2 Y11 was selected from BC3F9 population to continuously backcross with ‘Guanghui 998’. The near isogenic line of qWBPH2 Y11 was developed by molecular marker assisted selection, which displayed higher resistance to WBPH than the background parent ‘Guanghui 998’. The mapping of WBPH resistance QTLs and the development of the near isogenic line in this study will be helpful for cloning resistance genes and breeding resistant in rice cultivars.

Key words: rice (Oryza sativa L.), white-backed planthopper (WBPH), QTLs, gene mapping

表1

水稻白背飞虱抗性评价标准"

等级
Resistance score		 死苗率
Mortality rate (%)		 受害症状
Damage symptoms
0 <1.0 无损伤
No damage
1 1.1-10.0 非常微弱损伤
Very weak damage
3 10.1-30.0 第一、二叶叶尖发黄, 轻微的发育迟缓
The first and second leaves were yellow tips and slight developmental delay
5 30.1-50.0 明显的黄化矮化或大约一半的植物枯萎或死亡
Significant yellowing dwarfing or about half of the plants withered or died
7 50.1-70.0 超过半数植株死亡, 其他植株明显矮化萎蔫
More than half of the plants died, and the other plants were obviously dwarfed and wilted
9 >70.0 所有植株死亡
All the plants died

图1

‘Y11’和‘广恢998’白背飞虱抗性比较分析 A: 接种白背飞虱约10 d后‘Y11’和‘广恢998’植株; B: 接种白背飞虱10 d后‘Y11’和‘广恢998’的死苗率统计分析; C: 接种虫1、2和4 d后 ‘Y11’和‘广恢998’植株上白背飞虱的存活率; D: ‘Y11’和‘广恢998’各接种20头白背飞虱后0、1、2、3和4 d虫子数量; E: ‘Y11’和‘广恢998’置于虫源4周不同时间点白背飞虱数量统计分析。*: P < 0.05; **: P < 0.01; 标尺为3 cm。"

图2

‘Y11’/‘广恢998’ BC3F9群体白背飞虱抗性等级次数分布"

图3

‘Y11’/‘广恢998’BC3F9分子遗传图谱"

图4

抗白背飞虱QTL位点在染色体上的分布 黑色椭圆表示QTL在染色体上的位置。"

表2

‘Y11’/‘广恢998’ BC3F9群体检测到的抗白背飞虱QTL位点"

QTL 染色体
Chr.		 标记区间
Marker interval		 LOD值
LOD score		 贡献率
Variance explained (%)		 加性效应
Additive effect
qWBPH2Y11 2 id2013634 to id2015636 4.8 9.3 -0.20
qWBPH6Y11 6 id6006868 to id6007754 2.5 2.3 -0.07
qWBPH11Y11 11 id11005456 to K_id11007840 3.7 5.6 -0.17

图5

qWBPH2Y11近等基因系W0394白背飞虱抗性分析 A: 接种白背飞虱约10 d后‘W0394’和‘广恢998’的植株照片; B: 接种白背飞虱10 d‘W0394’和‘广恢998’的死苗率统计分析。标尺为3 cm; **: P < 0.01。"

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