Breeding of High-quality, High-yield, Blast-resistant, Long-shelf-life Hybrid Rice Nei-10-You-702
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摘要:
目的 创制生产上亟需的优质高产抗病耐储藏杂交稻新品种。 方法 将镇恢084、明恢86和多系1号通过多次杂交、回交、复交等育种技术,结合多年多品质鉴评、稻瘟病抗性鉴定及人工模拟老化进行耐储性鉴定等方法进行杂交稻新组合的选育。 结果 创制得到农艺性状优良的恢复系福恢702,将恢复系福恢702与优质三系不育系内香10A进行测交,选育出三系杂交稻新组合内10优702。内10优702的稻米品质达到部颁三级优质稻米质量标准,内10优702于2016−2017年参加湖北省恩施州区域试验及生产试验, 两年区试每667 m2平均产量586.60 kg,比对照瑞优399增产3.51%。内10优702的田间自然发病鉴定及室内接菌鉴定都表现为抗稻瘟病,人工老化处理21 d,整体发芽率为97.33%,28 d后整体发芽率仍然高达73.33%,2019年8月通过湖北省农作物品种审定委员会审定(鄂审稻2019040)。 结论 内10优702是优质高产兼较强的稻瘟病抗性及耐储性的杂交稻新品种。 Abstract:Objectives A new hybrid rice variety of high quality, high yield, and blast resistance that produced grains with a long shelf life was bred to help boost the crop production. Methods A new restorer line derived from Zhenhui 084, Minghui 86, and Duoxi 1 by the conventional multiple crossing, backcrossing, and double crossing was subjected to a multi-point quality evaluation, blast resistance testing, and accelerated storage tests prior to final selection. Results The restorer line with desirable agronomic characteristics, Fuhui 702, was crossed with a new 3-line sterile line Neixiang 10A to obtain the hybrid Nei-10-You-702, which had all major physiochemical indices met the departmental quality standards of Grade III high-quality rice. It was, subsequently, submitted for testing at the regional trial and the production test at Enshi prefecture in Hubei Province from 2016 to 2017. It showed an average yield of 586.60 kg per 667 m2, which was 3.51% higher than that of the reference Ruiyou 399. Nei-10-You-702 resisted rice blast according to a field observation as well as in an indoor challenge test. The seeds germinated at a rate of 97.33% after 21 d and 73.33% after 28 d of an artificial aging. It was approved by Hubei Provincial Crop Varieties Certification Committee in August 2019 (E Shen Dao 2019040). Conclusions The grains produced by the high-quality, high-yield, strongly blast-resistant Nei-10-You-702 could be stored for an extended period of time. It was deemed to become a promising new breed for rice production in the province. -
Key words:
- hybrid rice /
- Nei-10-You-702 /
- high quality /
- blast resistance /
- long shelf life
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图 3 内10优702、内香10A和福恢702的室内苗期稻瘟病抗性鉴定
①图中叶片为幼苗在室内接种菌株S2:NH17026后7 d的表型。② 1,云引;2,丽江新团黑谷;3,内香10A;4,内10优702;5,福恢702。
Figure 3. Phenotypes of Fuhui 702, Neixiang 10A, and Nei-10-You-702 inoculated for 7 d at seedling stage
① Image of leaf on seedling inoculated in laboratory by strain S2: NH17026 for 7 d. ② 1: Yunyin; 2: Lijiangxintuanheigu; 3: Neixiang 10A; 4: Nei-10-You-702; 5: Fuhui 702.
图 4 人工老化处理前后各品种的短时发芽率和整体发芽率
0 d:未处理的种子;21 d:人工老化处理21 d的种子;28 d:人工老化处理28 d的种子。同一图中误差线上方不同小写字母表示数据存在5%显著差异(P<0.05)。
Figure 4. Percentages of shortened and overall seed germination rates of different varieties of rice before and after artificial aging
0 d: seeds before treatment; 21 d: seeds after a 21 d artificial aging; 28 d: seeds after a 28 d artificial aging. Data with different letters above error line indicate significant difference at P<0.05.
表 1 福恢702和内10优702的农艺性状及粒形比较
Table 1. Agronomic characteristics and grain appearances of Fuhui 702 and Nei-10-You-702
供试材料
Variety株高Plant
hight/cm每丛有效穗数
Tiller number穗长
Panicle
length/cm一次枝梗数
Primary
branch二次枝梗数
Secondary panicle
branch穗粒数
Total grain
number per
panicle结实率Seed
setting rate/%粒长Grain
lengt/mm粒宽Grain
width /mm长宽比
Length-
width ratio千粒重1000-
grain weight/g福恢702
Fuhui 702139.8 7.8 26.7 12.6 53.6 279.0 94.39 9.25 2.58 3.7 30.33 内10优 702
Nei-10-You-702120.8** 8.8* 28.0* 12.3 50.3* 253.3** 95.00 9.46** 2.47* 3.9* 27.11** *表示在0.05水平上差异显著,**表示在0.01水平上差异极显著。 * represents significant difference at P<0.05, ** significant difference at P<0.01. 表 2 内10优702、内香10A和福恢702的稻瘟病抗性鉴定结果
Table 2. Blast resistance of Nei-10-You-702, Neixiang 10A, and Fuhui 702
品种
Variety田间自然发病鉴定 Natural induction in field 室内苗瘟鉴定 Seedling blast 苗瘟
Seedling blast叶瘟
Leaf blast穗颈瘟
Panicle blast综合抗性
Evaluation of
resistance混合接菌
Mixed
Inoculation菌株
Strain抗菌株率
Resistance
frequency/%综合抗性
Evaluation of
resistanceS1 S2 S3 S4 S5 S6 S7 S8 S9 S10 福恢702
Fuhui 702R MR R MR S R S S S S MR MR S S R 30.77 S 内香10A
Neixiang 10AR R R R R R R R MR R R MR R MS R 92.31 R 内10优702
Nei-10-You-702R R R R R MR R R R R R R MR MR R 100.00 R R:抗;MR:中抗;MS:中感;S:感。
R: resistant; MR: moderately resistant; MS: moderately susceptible; S: susceptible. -
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