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Seed selection method for rice with grass suppression function

A rice and functional technology, applied in the field of rice breeding with grass-suppressing function, can solve the problems of inconspicuous effect and long test period

Inactive Publication Date: 2012-01-25
RICE RES ISTITUTE ANHUI ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, existing studies are often limited to the study of leaves and roots of rice varieties themselves or identification through field screening.
These methods are not effective, or the test period is too long

Method used

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  • Seed selection method for rice with grass suppression function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: Field identification and creation of rice germplasm materials with significant grass-suppressing functions

[0013] Multi-generational screening was carried out on the hybrid progenies of zk167 / 93-067, and the conventional materials without the function of inhibiting weeds were used as controls, and the stable 6173 and 6177 with strong inhibitory ability against sedge-sedgegrass and the weakly inhibited ones were obtained through field identification. 6170 strain material; for 771 / 1538F 2 Multi-generation screening was carried out on the hybrid progenies of , and the 6180 strain material with strong inhibitory ability to sedge-sedgegrass was obtained through field identification with the conventional material without weed-inhibiting function as a control.

Embodiment 2

[0014] Example 2: Laboratory rapid identification of rice materials with significant grass-suppressing function

[0015] Potted planting treatment: select the rice materials (6177, 6171, 6180, 6173) that need to be identified for the function of inhibiting weeds, take the conventional material Shanyou 63 as a contrast, take 50 seed samples of newly harvested materials that are plump and free from insect erosion, and use vermiculite respectively The soil is used as a culture medium, sow it in a small culture pot (there is a hole in the bottom), sprinkle water to make the vermiculite moist, and spread dry vermiculite floating soil, place it in a large tray in an artificial climate incubator, and put a certain amount of water into the tray. Amount of deionized water is convenient for vermiculite to absorb water for paddy rice growth, cultivate about 10 days (temperature 30 ℃, humidity 75%), test sets two repetitions.

[0016] Extraction of root soil extract: After the rice to be ...

Embodiment 3

[0022] Example 3: Research on other sensitive substances in the extracts of rice germplasm materials with different grass-suppressing functions:

[0023] Extraction of other sensitive substances in the extracts of rice germplasm materials 6173 and 6171 with different herb-inhibiting functions: extract with equal volume of ether for 3 times, put in a 40°C water bath, concentrate to dryness, and then dissolve with 1ml of ether. The solution was further analyzed by GC-MS to obtain different sensitive substances.

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Abstract

The invention discloses a seed selection method for rice with the grass suppression function. By using the seat earth leaching liquor of new rice species with the grass suppression function, the invention can obviously suppress the characteristics of weed growth, and rice is induced to form seedling emergence with the pot experiment method, so as to quickly get seat earth leaching liquor; then, the seat earth leaching liquor is used to culture lettuce, the growth condition of the lettuce is observed, the length of the lettuce sprout is measured, grass suppression performance is identified, andthe rice with the grass suppression function can be obtained; sexual hybridization breeding techniques, such as hybridization, backcross, self cross and the like, are used for hybridizing the rice with the grass suppression function and the rice species with high yield, high quality and multiresistance, and are combined with the quick screening method of the rice with strong grass suppression characteristics for multi-generation screening to obtain products. The invention can primarily use cultivated rice species and the corresponding cultivation technique thereof to suppress grass accreted with rice, and can realize the goal of high yield and high efficiency under the condition of no use of weedicide and no manual prevention and killing.

Description

technical field [0001] The invention relates to a rice breeding method, in particular to a rice breeding method with the function of inhibiting weeds. Background technique [0002] my country is the most populous country in the world and one of the major agricultural countries in the world. Rice is the most important food crop in my country. However, rice is often stressed by weeds during its growth and development, and the growth of weeds can cause the loss of more than 10% of the world's grains every year. Especially the ubiquitous problem of difficult weeding in direct-seeding rice has led to a large-scale production reduction of rice. There are two main ways to control rice weeds: one is to use chemical herbicides, which treat the symptoms but not the root cause, and cause serious pollution to the environment and rice; the other is to use the inhibitory effect of different rice materials on weeds to screen The new rice variety with significant weed suppression functio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01H1/04A01H1/02A01G9/10
Inventor 张瑛吴跃进程太平宣红王岚
Owner RICE RES ISTITUTE ANHUI ACAD OF AGRI SCI