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Method for breeding drought-resistant hybrid rice

A hybrid rice and rice seed technology, applied in the field of drought-resistant hybrid rice breeding, can solve problems such as food security crisis, semi-aquatic plant stress, and difficulty in drought-resistant breeding, and achieve the goal of expanding genetic distance, protecting the ecological environment, and saving water resource effect

Inactive Publication Date: 2015-03-25
CHONGQING ACAD OF AGRI SCI
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AI Technical Summary

Problems solved by technology

However, this disaster caused physiological stress to the growth of semi-aquatic plants, seriously affected the normal growth of rice, restricted the sustainable development of rice production, and brought a crisis to food security.
[0004] In order to resist such natural disasters, in addition to adjusting the farming system, enhancing irrigation capacity, and adopting water-saving cultivation measures, screening or breeding drought-resistant rice varieties is one of the directions for resisting drought and developing water-saving agriculture. In fact, the vast majority are conventional upland rice varieties. Due to the difficulty of drought-resistant breeding, the investment in scientific research is far less than that of rice breeding. It is urgent to use new achievements in rice breeding to improve the level of upland rice breeding and accelerate its large-scale application.

Method used

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Effect test

Embodiment 1

[0020] A breeding method for drought-resistant hybrid rice. The C4 plant barnyardgrass with strong adaptability, humidity-loving, warm-loving, and drought-tolerant in Chongqing is selected as the donor, and the comprehensive agronomic technique developed by the "Yuyou" rice team of Chongqing Academy of Agricultural Sciences is used. The restorer lines Yuhui 7109R, 7108 R and the maintainer line 805B with excellent traits were the recipient parents;

[0021] (1) Introduction of barnyardgrass exogenous DNA: in the first spring in Chongqing, the total DNA of barnyardgrass was introduced into Yuhui 7109, Yuhui 7108, and maintainer line Yu 805B by using the pollen tube introduction method;

[0022] (2) Observation and selection of barnyardgrass DNA-introduced progeny materials: Plant the imported progeny materials in Hainan in the autumn of the first year and harvest the seeds per plant (D1); in the spring of the second year, plant each individual plant in a single-plant row area in...

Embodiment 2

[0029] The restorer lines 21281 (R7108×Barnyardgrass), 21288 (R7108×Barnyardgrass), 10486 (R7109×Barnyardgrass) bred in Hainan in the autumn of 2013 and Yu 650A, Yu 802A, Yu 805A Wait for CMS testing and mating.

[0030] In the spring of 2014, it was planted in the Yuxi Science and Technology Demonstration Park of Chongqing Academy of Agricultural Sciences, Yongchuan District, Chongqing: it was sown on March 6, the seedlings were raised with plastic film, and the seedlings were transplanted on April 17. The planting size was 33cm×20cm, and each combination Plant 5-10 rows, 12 litters per row. Irrigation of shallow water in the field within 10 days after transplanting is conducive to the rejuvenation and survival of the seedlings. After the seedlings are alive and drained until the rice matures, the field will no longer be artificially irrigated; before the rice is harvested, 5 litters with the average number of spikes are used to investigate the traits of spikes and grains. 6...

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Abstract

The invention discloses a method for breeding drought-resistant hybrid rice. The method comprises the following steps: introducing total DNA of barnyard grass into a restorer R and a maintainer line B, planting the introduced DNA progeny material, harvesting seeds of a single plant to obtain seed rice D1, planting each single plant seed of the D1 in a single plant line area by 10-15 lines, respectively performing mixed harvesting on the single plant to obtain seed rice D2, planting each single plant seed of the D2 by 20 lines, performing single plant harvesting on variant strains of leaf type, ear type and plant type character donor barnyard grass so as to obtain seed rice D3, performing conventional planting on single plant D3, screening to obtain a single plant with good characters so as to obtain seed rice D4, carrying out backcrossing on the selected maintainer line and 650A as well as the D4, thereby obtaining the offspring D5 with C4 plant resources. The method disclosed by the invention is simple and rapid, and the bred rice variety is excellent in drought resistance and has a high economic value.

Description

technical field [0001] The invention belongs to the technical field of agricultural breeding, and in particular relates to a method for breeding drought-resistant hybrid rice. Background technique [0002] Global water shortages and the continuous decline of groundwater levels lead to frequent occurrence of global drought disasters. But our country is a big agricultural country, the drought seriously endangers our country's agricultural production and food security, and restricts our country's agricultural development. According to the statistical data released by the National Flood Control and Drought Relief Headquarters, in 2009, 2010, and 2011, it suffered serious losses due to drought for three consecutive years. Drought has caused a large loss of national income and seriously restricted the development of my country's economy and society. Therefore, finding or accelerating the cultivation of new varieties of drought-resistant crops will help stabilize and promote my c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/04
Inventor 李经勇唐永群张现伟文明姚雄肖人朋甘兴友
Owner CHONGQING ACAD OF AGRI SCI
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