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Novel summer corn SRP class group selfing line breeding method

A technology for inbred lines and summer corn, which is applied in the field of breeding of inbred lines of the SRP group of summer corn, can solve the problems of fragile cobs, slow dehydration, poor density resistance and lodging resistance, etc., and achieve good adaptability and coordination The effect of high strength and compact plant type

Inactive Publication Date: 2015-07-29
FUYANG JINZHONGZI CORN RES INST
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AI Technical Summary

Problems solved by technology

Except for Zhengdan 958, the combined hybrids have poor density tolerance and lodging resistance, and when planted at 4500 plants / 667 mu or more, large areas of root lodging
In addition, the ear quality of the combined hybrids is poor, and there are disadvantages such as slow dehydration and fragile cobs.

Method used

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  • Novel summer corn SRP class group selfing line breeding method
  • Novel summer corn SRP class group selfing line breeding method

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Embodiment

[0016] Breeding method of inbred line 7258 and its extended varieties

[0017] Combining R×P and S inbred lines, R×P selects the 2008 summer sowing group to match 319 (P group)×Zheng 58 (R group), and the summer sowing in 2011 has reached the F6 generation, and the line code is C3958. The C3958 group was used to match Chang 7-2 (group S), after continuous self-crossing and Hainan breeding, after the mating in Hainan from October 2013 to April 2014, the hybrid combination identification was carried out from June to October 2014, the parental inbred line Has reached the F6 generation. From November 2014 to April 2015, the hybrid combination Hainan was identified, and the F7 generations of the parental inbred lines were all stable. The selected inbred line is named 7258. The plant height of the 7258 inbred line is 160cm, the ear height is 60-70cm, and the leaves are 19-20 pieces. 8-12 branches, males yellow-green, anthers light purple, filaments light red. Ear tube type, ear l...

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Abstract

The embodiment of the invention adopts the following technical scheme, i.e. a novel summer corn SRP class group selfing line breeding method. The method is characterized in that F1 generation can be formed by hybridizing every two of a P class group corn, an Reid class group corn and an S class group corn; three or two F1 generations are hybridized to form an SRP class group; the SRP class group is subjected to back cross breeding or complex hybridization to breed a selfing line. The selfing line bred by the SRP class group breeding method has the characteristics of dense-resistance, disease resistance, lodging resistance and high combining ability; grains are hard grains or semi-hard grains; the self yield is that the grain weight of single spike is about 100g; the selfing line has the characteristics of compact plant type, dense planting resistance, high temperature resistance, rain waterlogging resistance, high adaptability to bad environment, and the like.

Description

technical field [0001] The invention relates to the technical field of agricultural breeding, in particular to a method for breeding a novel summer maize SRP group inbred line. Background technique [0002] These three groups are the main breeding germplasm in Huanghuaihai and adjacent areas, and their advantages and disadvantages are as follows: [0003] (1) P group germplasm: mainly 78599 series, Suwan (Suwan), Tuxpend tropical germplasm, inbred lines of this group germplasm: Qi 319, P138, P178, 87-1, Dan 599, 8085T, Su 37 , Double M9, etc., with semi-compact plant type and loose slope leaf type, showing good resistance to corn spot, rust, stem rot, and Curvularia leaf spot. The inbred lines of this group are sensitive to light reflection , the growth period is long, and the tightness is poor. Most of the combined hybrids are of tall stem and big panicle type, which are sensitive to planting density. The suitable planting density is 3000-3500 plants, and the planting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02
Inventor 常岳
Owner FUYANG JINZHONGZI CORN RES INST
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