关键词:稻瘟病; 种质资源; 自然诱发; 抗谱; 优异抗源 Identification and Evaluation of Blast Resistance for Resequenced Rice Core Collections LI Xu-Sheng1,**, XIANG Xiao-Jiao2,**, SHEN Cong-Cong2, YANG Long-Wei1,*, CHEN Kai3, WANG Xiao-Wen1, QIU Xian-Jin1, ZHU Xiao-Yuan4, XING Dan-Ying1, XU Jian-Long2,3,* 1 Hubei Collaborative Innovation Centre for Grain Industry, Yangtze University, Jingzhou 434025, China
2 Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China
3Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518210, China
4 Institute of Rice Research, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
Fund:This study was supported by National High-Tech Research & Development Plan (863 program) (2014AA10A601), Open Fund of Hubei Collaborative Innovation Centre for Grain Industry (2015MS010, LXT-16-06, LXT-17-02), the Shenzhen Peacock Plan (20130415095710361), Collaboration Project of Hubei Academy of Agricultural Sciences (2015H200014), and Open Fund of Research Centre of Ministry of Education for Wetland Ecology & Agronomy Application (KF201403). AbstractRice blast is one of the key factors that restrict rice yield, and screening blast resistance resources is a basis work for mining blast resistance genes and breeding resistant varieties. A set of 1217 accessions selected from 3000 (3K) re-sequenced rice core collection were comprehensively evaluated for blast resistance in two natural disease nurseries at Lianghe and Bajiao in Enshi area and agronomic traits in disease-free field as well as resistance spectrum of resistant accessions at seedling stage. There were significant differences in response of different accessions to rice blast. Among them, a total of 144 accessions with blast resistance at different growing stages were obtained. Thirty-four accessions with relatively high comprehensive blast resistance were inoculated with 30 diverse isolates, showing that 17 accessions with a broad resistance spectrum (≥70%). According to the investigation of agronomic traits, most resistant accessions had high plant height, low grain yield per plant and poor agronomic traits. Finally, seven accessions with high blast resistance, broad resistant spectrum and relatively good agronomic traits were selected, including IRGA411-1-6-1F-A, YJ 30, Jinzao 47, Quanzhen 10, YN 1353-3, Yunjing 23, and IRAT1047, were identified. Those resistant accessions can be used in mining resistance gene and variety improvement for blast resistance.
Keyword:Rice blast; Germplasm; Natural infestation; Resistance spectrum; Excellent resistance resource Show Figures Show Figures
表4 病圃综合抗性强和田间表现较好材料的稻瘟病病情 Table 4 Blast incidence of materials with good blast resistance and field performance in the nursery
田间号 Field code
品种名称 Variety name
平均苗瘟 病级 Average seedling blast grade
平均叶瘟 病级 Average leaf blast grade
平均 穗瘟率 Average neck blast rate (%)
最高苗瘟 病级 Maximum seedling blast grade
最高叶瘟 病级 Maximum leaf blast grade
最高穗 瘟率 Maximum neck blast rate (%)
最高综合 指数 Maximum comprehensive index
最高综合 病级 Maximum comprehensive grade
EJ0235
IRGA411-1-6-1F-A
0.0
0.0
3.5
0
0
6
1.25
1
EJ0270
IRAT266
0.5
2.8
1.50
1
4
4
1.75
1
EJ0441
IRAT109
0.0
0.8
5.50
0
2
10
1.75
1
EJ0465
IR64-IL
0.0
0.5
0.25
0
1
1
0.50
1
EJ0512
053A-3
0.0
2.5
6.8
0
5
10
2.00
1
EJ0513
BD007
0.0
0.0
0.50
0
0
1
0.25
1
EJ0514
CAU1
1.0
0.0
1.8
2
0
4
0.75
1
EJ0515
云陆102 Yunlu 102
2.5
1.5
0.75
3
3
2
1.50
1
EJ0537
YJ30
4.0
4.5
1.25
4
5
2
2.00
1
EJ0546
611
0.0
0.0
2.00
0
0
4
0.75
1
EJ0611
金早47 Jinzao 47
0.0
0.0
0.00
0
0
0
0.00
0
EJ0616
泉珍10号Quanzhen 10
0.0
0.0
8.8
0
0
10
1.25
1
EJ0619
密阳46 Milyang 46
4.0
2.0
0.75
4
4
2
1.75
1
EJ0641
SET
4.0
3.0
0.00
4
4
0
1.00
1
EJ0666
YN1353-3
0.0
1.5
0.00
0
3
0
0.75
1
EJ0744
旱277 Han 277
4.5
4.5
5.0
5
5
5
2.00
1
EJ0748
陆引46 Luyin 46
0.0
1.5
1.0
0
3
2
1.50
1
EJ0752
云粳23 Yunjing 23
5.0
4.5
0.00
5
5
0
1.25
1
EJ0790
LOCAL BHAT
4.5
4.8
6.5
5
5
10
2.50
3
EJ0868
B6144-MR-6-0-0
0.0
0.5
0.00
0
1
0
0.25
1
EJ0876
GOOLARAH
5.0
4.3
4.50
5
5
6
2.50
3
EJ0885
IRAT104
0.0
0.0
0.00
0
0
0
0.00
0
EJ0952
越富 Yuefu
0.0
2.0
0.50
0
4
2
1.75
1
EJ0964
巴西糯稻 Baxinuodao
0.0
0.5
3.50
0
1
4
1.00
1
EJ0967
IRAT 104
0.0
1.0
0.00
0
2
0
0.50
1
EJ0973
云陆103 Yunlu 103
3.5
2.3
0.00
4
4
0
1.00
1
EJ1082
MARANHAO BRANCO
4.0
2.3
3.50
4
4
8
2.25
3
EJ1083
MIUDO ROXO
4.0
2.0
3.30
4
4
5
1.75
1
EJ1121
CENTURY PATNA
0.0
0.0
0.00
0
0
0
0.00
0
EJ1137
VALTEJO
0.0
0.0
1.00
0
0
4
0.75
1
EJ1142
167
4.0
2.0
0.00
4
4
0
1.00
1
EJ1203
Ginga
4.0
2.0
0.00
4
4
0
1.00
1
EJ1211
IAC47
0.0
1.0
4.80
0
2
7
1.75
1
EJ1214
IAC165
0.0
0.5
0.50
0
1
1
0.50
1
Scores 0-3 stand for resistant while 4-9 for susceptible for seedling and leaf blast; scores 0-1 stand for resistant while 3-9 for susceptible for comprehensive blast grade. 表中苗瘟和叶瘟病0~3级为抗, 4~9级为感; 综合病级0~1级为抗, 3~9级为感。
表4 病圃综合抗性强和田间表现较好材料的稻瘟病病情 Table 4 Blast incidence of materials with good blast resistance and field performance in the nursery
表5 从2个病圃筛选获得的30份抗性材料的苗期抗谱测定 Table 5 Test of resistance spectrum at seedling stage for 30 accessions with llast resistance screened from the two nurseries
表5 从2个病圃筛选获得的30份抗性材料的苗期抗谱测定 Table 5 Test of resistance spectrum at seedling stage for 30 accessions with llast resistance screened from the two nurseries
4 结论对重测序的1217份水稻核心种质资源在恩施两河和芭蕉两个病圃进行稻瘟病抗性自然诱发鉴定, 两病圃的鉴定结果基本一致, 从中获得144份抗苗瘟、叶瘟和穗瘟的抗病种质。选稻瘟病综合抗性较好的34份材料进行30个不同来源的稻瘟病菌株苗期接种鉴定, 筛选出17份抗性频率≥ 70%的广谱抗性材料。鉴定出7份稻瘟病抗性强、抗谱广且农艺性状较好的优异抗源材料IRGA 411-1-6-1F-A、YJ30、金早47、泉珍10号、YN 1353-3、云粳23和IRAT1047, 可作为抗源亲本用于稻瘟病抗性基因挖掘和品种抗稻瘟性改良。 The authors have declared that no competing interests exist.
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