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Breeding and cultivating method for millet varieties resisting sethoxydim and imidazolone herbicides

An imidazolinone and imidazolinone-resistant technology is applied in the field of crop breeding and cultivation to achieve the effects of strong comprehensive disease resistance, moderate maturity and excellent comprehensive traits.

Active Publication Date: 2017-05-10
GRAIN RES INST HEBEI ACAD OF AGRI & FORESTRY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, simple herbicide-resistant varieties can only achieve chemical weeding, and herbicide-resistant varieties that can both chemical weeding and chemical thinning are actually multi-line varieties composed of 2-3 sister lines. New millet varieties and sister lines of the same type that are not resistant to or resistant to different herbicides, and new varieties of millet that are resistant to, not resistant to or resistant to different herbicides and sister lines of the same type are mixed in a certain proportion to form multi-line varieties. On the premise that a larger seeding rate exerts the effect of the group topping the soil, the difference in resistance to herbicides is used to selectively spray specific herbicides according to the emergence of the seedlings to achieve the purpose of seedling growth and weeding at the same time

Method used

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Experimental program
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Effect test

Embodiment 1

[0027] 1. Breeding process

[0028] In the spring of 2008, the combination K359×M4-1 was prepared in the greenhouse of the experimental station. The female parent K359 is one of the high-yield, high-quality and anti-napling varieties Jigu 25 bred by the Millet Research Institute of the Hebei Academy of Agriculture and Forestry Sciences. The male parent M4-1 is Imidazolinone herbicide-resistant breeding material created by the Millet Research Institute of Hebei Academy of Agriculture and Forestry Sciences. In the summer of 2008, F1 true hybrids were screened out by spraying imidazolinone herbicides. In 2009, F2 generation M460 was sprayed with imidazolinone herbicides and took out 6 individual plants; in 2009, Hainan Nanfan F3 generation H381 (M460-3) was sprayed with imidazolinone herbicides and took out 10 plants. 8 individuals were selected from F4 generation M702 (H381-10) in 2010; 7 individuals were selected from F5 generation HM223 (M702-7) of Hainan Nanfan in 2010; 2011...

Embodiment 2

[0049] Genetic analysis of resistance to Nabujing and imidazolinone herbicides in millet:

[0050] (1) The germplasm resistance of the millet germplasm resistant to Nabujing and imidazolinone herbicides of the present invention is stable, and the resistance level of multi-generational selfing does not change.

[0051] (2) Hybridization of resistant and sensitive materials, the first generation of hybrids shows resistance to herbicides, the F2 generation meets the 3:1 resistance-sensitivity segregation, and the backcross generation meets the 1:1 resistance-sensitivity segregation. Orthogonal and inverse crossover results are consistent. It indicated that the traits of millet resistance to natate and imidazolinone herbicides were respectively controlled by a pair of nuclear dominant genes.

Embodiment 3

[0053] Analysis of the second effect of resistance genes in millet germplasm resistant to Nabujing and imidazolinone herbicides:

[0054] (1) At different densities (30 strains / square meter, 50 strains / square meter), three different patterns are planted with resistance-sensitivity near-isogenic lines (100% also resistant to Natura, imidazolinone herbicide millet population, 50% Resistance, 50% perceptual mixed group, 100% perceptual group), 5 repetitions, 15 square meters per plot;

[0055] (2) Investigate the agronomic traits in different periods, by comparing the results of different populations and different conditions of resistance and susceptibility to close isogenic lines;

[0056] (3) The research results showed that the acquisition of millet resistance to Nabujing and imidazolinone herbicide genes would not reduce the horizontal effect of agronomic traits.

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Abstract

The invention discloses a breeding method for millet varieties resisting sethoxydim and imidazolone herbicides, and belongs to the technical field of crop breeding and cultivating. The breeding method includes the steps: (1) taking millet resisting sethoxydim as female parents, performing hybridization for the millet resisting sethoxydim and millet resisting imidazolone herbicides to obtain F1-generation seeds, and spraying imidazolone herbicides; (2) performing self-cross for the F1-generation seeds sprayed the imidazolone herbicides to obtain 4-5-generation seeds, spraying the imidazolone herbicides and sethoxydim, and selecting from high-generation seeds to obtain the millet varieties. The invention further provides an application and a cultivating method of the millet varieties. According to the breeding method, novel millet varieties resisting sethoxydim and imidazolone herbicides are cultivated, cultivation technologies matched with the millet varieties are researched, the method has high flexibility in thinning weed killing aspect of herbicides, and the cost of the herbicides is low.

Description

technical field [0001] The invention belongs to the technical field of crop breeding and cultivation, and relates to a method for breeding and cultivating millet varieties that are also resistant to Nabutin and imidazolinone herbicides. Background technique [0002] The use of herbicides to kill weeds is a basic measure of modern agricultural production. Millet itself is not resistant to herbicides, and because of its small size, it is difficult to sow accurately. It has been relying on artificial thinning and weeding for thousands of years, which seriously restricts the large-scale and intensive production of millet, which is a key constraint factor for industrial development. Therefore, cultivation and The application of herbicide-resistant varieties is the key to realize light, simplified and large-scale production of millet. At present, the simplified cultivars of millet used in production are mainly monocotyledonous weeds, which can only kill monocotyledonous weeds whe...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01H1/04A01G1/00A01N43/50A01N35/10A01P21/00
CPCA01G22/00A01H1/02A01H1/04A01N35/10A01N43/50A01N2300/00
Inventor 师志刚张婷王根平程汝宏董立
Owner GRAIN RES INST HEBEI ACAD OF AGRI & FORESTRY SCI
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