CN101427651A

CN101427651A - Cultivation method for dual-purpose hybrid rice for flood and drought

Info

Publication number: CN101427651A
Application number: CNA2007101699812A
Authority: CN
Inventors: 武小金
Original assignee: CHINA NATIONAL HYBRID RICE R&D CENTER QINGHUA SHENZHEN LONGGANG INSTITUTE
Current assignee: CHINA NATIONAL HYBRID RICE R&D CENTER QINGHUA SHENZHEN LONGGANG INSTITUTE
Priority date: 2007-11-08
Filing date: 2007-11-08
Publication date: 2009-05-13

Abstract

The invention relates to a flood-drought compatible type hybrid paddy rice cultivation method, comprising the following steps: 1 two-series method way: obtaining the flood-drought compatible type hybrid paddy rice seeds by respectively hybridizing and matching the paddy rice photo-thermo sensitive sterile line quasi S with the dry rice Lu drought15; 2 using conventional agent-molecule mark co-selection technique and conventional herbicide screening technique, guiding the herbicide resistant gent such as bar or the like into quasi S; 3 using conventional wet dry farming condition co-screening technique, the seeds obtained by the step 1-2 being subjected to wet culture and then dry culture, to screen out flood-drought compatible type hybrid paddy rice with excellent yield, resistance and quality and then reproduce. The test shows that the yield at wet farming is higher than the conventional hybrid paddy rice yield and the yield at dry farming is higher than the conventional hybrid paddy rice yield by above 50%.

Description

A kind of breeding method of dual-purpose hybrid rice for flood and drought

Technical field

The present invention relates to a kind of breeding method of dual-purpose hybrid rice for flood and drought, belong to new variety of plant selection technical field.

Background technology

Arid is the one of the main reasons of the world food underproduction.And the Rice Production water accounts for seventy percent of the whole agricultural water amounts of China, has consumed about half of total water amount, and this present situation has seriously hindered the especially development of grain of agricultural.International paddy rice institute is just carrying out the research of paddy rice drought resisting breeding from the seventies beginning in last century always, yet progress also not quite, and reason is to lack standard of perfection and drought resisting germplasm.China national upland rice regional test was started in 2000, Shanghai Agricultural biological gene center has been built up on the basis, land for growing field crops can be rainproof, can realize the drought resisting evaluation facility of the soil moisture management of science again, and form the technical system of " soil moisture gradient survey method ".Can in a field, finish the moisture content gradient processing that is sufficient to the lack of water arid from moisture content simultaneously, flora is carried out the moisture content control in the time of infertility, thereby realize under field condition, paddy drought resistance being done accurately to estimate.This technology has reached world lead level, and this system is being born national upland rice regional test drought resistance and identified, and has born the drought resistance evaluation of international water saving rice regional test simultaneously.Yet prior art still is confined in the seed selection of conventional upland rice variety, this one; Whole breeding system still is based upon on this narrow basis of dry farming, this its two; It three is to solve the seasonal drought problem preferably.There is more than 100,000,000 mu of threat that is subjected to seasonal drought in the rice field of China, and what these rice fields needed is not the upland rice variety that yields poorly, but needs to solve the problem of seasonal drought.Therefore, set up a scientific and normal drought resistance authenticate technology system, excavate the drought resisting resource, become the significant problem that this field needs to be resolved hurrily.

Summary of the invention

The technical problem to be solved in the present invention is, deficiency at the prior art existence, a kind of breeding method of dual-purpose hybrid rice for flood and drought is proposed, this method must successfully be resolved the seasonal drought problem, and neither be confined in the seed selection of conventional upland rice variety, also do not allow whole breeding system only based on dry farming.

Technical solution of the present invention is that the breeding method of described a kind of dual-purpose hybrid rice for flood and drought is to be following step:

1, use conventional two line method approach,, drought extensive 107, non-irrigated extensive 109 etc. extensive 101 with rice photo-thermo-sensitive male sterile quasi S, S8063, S9561 and the S9599 etc. that carry the rice photo-thermo-sensitive genic male sterile gene and derive photo-thermo-sensitive genetic male sterile line and good upland rice Lu drought 15, Israel upland rice and Indonesia upland rice etc. and improved progeny drought thereof hybridize combo respectively after cultivate floods and droughts dual-purpose type hybrid rice seed.

2, utilize conventional dose-molecular labeling to select technology and conventional herbicide screening technology altogether, be aided with molecular marker assisted selection, with anti-herbicide gene such as the bar strong rice photo-thermo-sensitive male sterile quasi Ss that carries the rice photo-thermo-sensitive genic male sterile gene of importing drought-resistant ability such as (herbicide resistance genes), S8063, S9561 and S9599 etc. and derive photo-thermo-sensitive genetic male sterile line and good upland rice Lu drought 15, Israel upland rice and Indonesia upland rice and improved progeny drought extensive 101 thereof, drought extensive 107, drought extensive 109, make step 1 gained floods and droughts dual-purpose type hybrid rice seed have Herbicid resistant in vegetative period, thereby can exempt weeding.

3, utilize conventional floods and droughts to make condition triage techniques altogether, the floods and droughts dual-purpose type hybrid rice seed that step (1～2) gained is had a Herbicid resistant carries out first water to be done the back dry farming and cultivates, and all shows excellent floods and droughts dual-purpose type hybrid rice kind and is finished product thereby filter out output, resistance and quality under two kinds of conditions.Promptly do through water earlier from step (1～2) gained after filter out output, resistance and all excellent kind of quality three the floods and droughts dual-purpose type hybrid rice new varieties of dry farming, this kind can drop in batches and produce.

The invention has the beneficial effects as follows, use the dual-purpose hybrid rice for flood and drought new varieties that this method cultivated that technique scheme provides, plant experimentally through the experimental field and to show, not only water does that output is higher than traditional hybrid rice output under the condition, production ratio conventional hybridization rice during its seasonal drought under the dry farming condition is high more than 50%, and social benefit and economic benefit are inestimable.

Embodiment:

Embodiment 1:

1, with stronger rice photo-thermo-sensitive male sterile quasi S of drought-resistant ability and high-quality upland rice Lu drought 15 hybridization combos cultivate accurate two excellent 15;

2, utilize conventional dose-molecular labeling to select technology altogether, anti-herbicide gene bar conventional method is imported accurate S, get the accurate S of B-, import step 1 gained accurate two excellent 15 and get B-accurate two excellent 15;

3, utilize conventional floods and droughts to make condition triage techniques altogether, step (1～2) gained B-accurate two excellent 15 is carried out first water does the back dry farming and cultivate, water do and two kinds of conditions of dry farming under screen output, resistance and the quality three is all excellent and drought-resistant ability is very strong dual-purpose hybrid rice for flood and drought kind B-standard two excellent 15.

Standard that the accurate S of above-mentioned usefulness and Lu drought 15 combos are cultivated two is excellent 15, and water is done the stage, comparison according in excellent 838 volume increase 3%; And premenstruum (premenstrua), water was done, and it is dry farming that the later stage does not pour water, excellent 838 seed rice volume increase 53.6% in contrasting, and its resistance and quality all obviously be better than in excellent 838.Accurate two excellent 15 output of B-are suitable with accurate two excellent 15, and antiweed.

Embodiment 2:

In this example, only with the rice photo-thermo-sensitive male sterile quasi S in the stronger rice photo-thermo-sensitive male sterile line S9599 alternative embodiment 1 of drought-resistant ability, all the other are with embodiment 1.

Claims

1. the breeding method of a dual-purpose hybrid rice for flood and drought, this method is following step:

1, use conventional two line method approach,, drought extensive 107, non-irrigated extensive 109 extensive 101 with the rice photo-thermo-sensitive male sterile quasi S, S8063, S9561 and the S9599 that carry the rice photo-thermo-sensitive genic male sterile gene and derive photo-thermo-sensitive genetic male sterile line and good upland rice Lu drought 15, Israel upland rice and Indonesia upland rice and improved progeny drought thereof hybridize combo respectively after cultivate floods and droughts dual-purpose type hybrid rice seed.

2, utilize conventional dose-molecular labeling to select technology and conventional herbicide screening technology altogether, be aided with molecular marker assisted selection, anti-herbicide gene is imported drought-resistant ability strong the rice photo-thermo-sensitive male sterile quasi S, S8063, S9561 and the S9599 that carry the rice photo-thermo-sensitive genic male sterile gene and derive photo-thermo-sensitive genetic male sterile line and good upland rice Lu drought 15, Israel upland rice and Indonesia upland rice and improved progeny drought extensive 101 thereof, drought extensive 107, drought is extensive 109, makes step 1 gained floods and droughts dual-purpose type hybrid rice seed have Herbicid resistant in vegetative period.

3, utilize conventional floods and droughts to make condition triage techniques altogether, the floods and droughts dual-purpose type hybrid rice seed that step (1～2) gained is had a Herbicid resistant carries out first water to be done the back dry farming and cultivates, and all shows excellent floods and droughts dual-purpose type hybrid rice kind and is finished product thereby filter out output, resistance and quality under two kinds of conditions.