Unlock instant, AI-driven research and patent intelligence for your innovation.

Screening method of low-cadmium rice and method for breeding low-cadmium conventional late rice variety

A screening method and rice technology, applied in the field of breeding, can solve the problems of unformed systematic selection, screening methods, evaluation standards, etc., and achieve the effects of scientific and reliable results, stable genetic sources, and easy evaluation of effects.

Active Publication Date: 2015-11-18
HUNAN RICE RES INST
View PDF5 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, most breeders currently only conduct low-cadmium screening tests on the selected varieties for the selection of low-cadmium varieties, and have not formed a systematic method of parent selection, screening methods, and evaluation standards.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Screening method of low-cadmium rice and method for breeding low-cadmium conventional late rice variety
  • Screening method of low-cadmium rice and method for breeding low-cadmium conventional late rice variety
  • Screening method of low-cadmium rice and method for breeding low-cadmium conventional late rice variety

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1 Breeding of Low Cadmium Conventional Late Rice Variety Chuang No. 11

[0041] 1) Cultivate stable strains

[0042] In Hainan in 2002, Brazil U2 was used as the female parent and Nongxiang 18 was used as the male parent to cross, and the next 4 generations were self-bred and directional selection, and F was obtained in 2004. 5 An excellent single plant of the generation 1.

[0043] In 2004, Xiangwan Xian 12 was used as the female parent, and plant 1 was used as the male parent to harvest 24 hybrid seeds.

[0044] After targeted breeding in Sanya, Hainan and Changsha, Hunan from 2005 to 2012, F 9 Generation, get 20 stereotyped stable strains, respectively numbered as Chuang No. 1, Chuang No. 2 ... Chuang No. 20.

[0045] 2) Field planting screening

[0046] Prepare to identify fields: In June 2013, 3 fields with different cadmium pollution levels were selected as test fields for identification. The soil cadmium pollution degrees of the three fields were lig...

Embodiment 2

[0059] Example 2 Breeding of Low Cadmium Conventional Late Rice Variety Xiangxiang No. 5

[0060] 1) Cultivate stable strains

[0061] In 2002, Xiangwanxian 10 was used as the female parent and Xiangwanxian 9 was used as the male parent in Hainan in 2002. After 4 generations of self-breeding and directional selection, the F 5 Generation single incense 903.

[0062] In 2004, Xiang 903 was used as the female parent and Xiangwan Xian 12 was used as the male parent to harvest 17 hybrid seeds.

[0063] After targeted breeding in Sanya, Hainan and Changsha, Hunan from 2005 to 2012, F 8 Generation, 17 stereotyped stable strains were obtained, respectively numbered as Xiangxiang 1, Xiangxiang 2...Xiangxiang 17.

[0064] 2) Field planting screening

[0065] Prepare to identify fields: In June 2013, 3 fields with different cadmium pollution levels were selected as test fields for identification. The soil cadmium pollution degrees of the three fields were light (Qingshanqiao Town, N...

Embodiment 2

[0074] Table 4 Example 2 Potted Cultivation Test Brown Rice Cadmium Content Determination Results

[0075]

[0076]

[0077] Under light, medium and heavy conditions, only one new variety with lower cadmium content than the control variety (Xiangwanxian 12) was found in Xiangxiang 5. In this way, the low-cadmium late rice variety Xiangxiang No. 5 has been bred.

[0078] Xiangxiang 5 is an indica-type conventional rice. It has an average growth period of 117 days as a double-cropping late rice in the middle and lower reaches of the Yangtze River, which is 2 days longer than the control Yueyou 9113. The plant height is 103 cm, the plant type is moderate, and the color changes well at the ripening stage. The effective number of ears per mu is 215,000 ears, the ear length is 252 cm, the total number of grains per ear is 112.0 grains, the seed setting rate is 85%, and the thousand-grain weight is 28 grams. Resistance: Rice blast comprehensive resistance level 7.0, bacterial...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a screening method of low-cadmium rice and a method for breeding the low-cadmium conventional late rice variety. The screening method comprises steps of selecting Xiangwanxian No. 12 as a comparison; carrying out dual tests of filed planting and potted planting; and arranging light, middle and high degrees of cadmium pollution. The varieties / strains of obtained low-cadmium rice after screening have fundamental and stable characteristics. The invention also provides a method for breeding the low-cadmium conventional late rice variety. According to the invention, the Xiangwanxian No. 12 is used as the stable strain for parent breeding; and the low-cadmium conventional late rice variety can be selected with the above screening method; and excellent varieties of Chuang No. 11 and Xiangxiang No. 5 of the low-cadmium conventional late rice variety have been bred.

Description

technical field [0001] The invention relates to a breeding technology, in particular to a method for screening low-cadmium rice and a method for breeding low-cadmium conventional late rice varieties using the method. Background technique [0002] At present, the cultivated land polluted by cadmium in my country is about 1.13 million hectares, involving 11 provinces (municipalities). Every year, about 100 billion tons of grains are reduced due to heavy metal pollution, and 120 billion tons of grains are polluted. Rice is the largest food crop in my country, and about 60% of the population in the country takes rice as a staple food. Hunan is the province with the largest rice planting area in my country, with an annual planting area of ​​about 4 million hectares and an annual production of about 60 billion jin of grain. At the same time, Hunan is a hometown of non-ferrous metals. With the development of industry, water pollution, and the increase of cadmium deposited in the a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): A01G16/00A01H1/02A01G22/22
CPCA01G22/22A01H1/02
Inventor 闵军黎用朝阳标仁刘三雄刘利成黄为王子平黄海明
Owner HUNAN RICE RES INST