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Breeding method of novel group PLR germplasm of corn

A kind of group and germplasm technology, applied in the direction of botanical equipment and methods, application, plant genetic improvement, etc., to achieve the effects of fast dehydration, improved dehydration, and compact plant type

Pending Publication Date: 2019-05-10
贵州省旱粮研究所
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Problems solved by technology

[0007] Aiming at the deficiencies in the prior art, the invention provides a breeding method for PLR germplasm of a new group of maize, which solves the problems of high yield, disease resistance, dehydration, and tip sealing of the inbred line itself, and intends to overcome the existing There are technical deficiencies

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  • Breeding method of novel group PLR germplasm of corn
  • Breeding method of novel group PLR germplasm of corn
  • Breeding method of novel group PLR germplasm of corn

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Embodiment Construction

[0018] Embodiments of the present invention: select hybrids from temperate zone production that perform well, i.e. hybrid F under Reid×Lan. and Reid×P group patterns 1 -F 2 Generation of germplasm, respectively breeding inbred lines, and measuring the combining ability; determine the breeding target according to the production demand, select R / P and R / L inbred lines with high combining ability and complementary agronomic traits, and backcross Determine the proportion of germplasm of P, L, R taxa by means of the method, and form the germplasm of PLR taxa, which becomes S 0 generation; the S 0 Generation of mixed pollination, mixed planting, mixed threshing, to obtain S 1 generation;

[0019] Step 2: S obtained in step 1 1 After the generation seeds are planted, carry out self-crossing of a single plant, according to the method of step 1, strictly according to the breeding objectives, select disease resistance, stress resistance, plant traits and ear traits, and select disea...

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Abstract

The invention discloses a breeding method of a novel group PLR germplasm of corn. The method comprises the steps of selecting well-performing hybrids from temperate production, namely hybrid F1-F2 generation germplasms in the modes of Reid*PB group and Reid*Lan., respectively breeding selfing lines and measuring combining ability; and constructing the PLR group germplasm by utilizing the R / P and R / L selfing lines with high combining ability and complementary agronomic traits. The method has the beneficial effects that the early generation selection and the S3-S4 generation haploid breeding areadopted; according to the method, the plant type, the resistance, the panicle traits and the like are strictly selected in flowering and harvesting periods and a batch of excellent selfing lines arebred; barren ear tips are reduced; the resistance, the combining ability, the tip sealing property, the seed-producing rate, the dehydration property and the adaptability are increased; and the prepared hybrids can meet the production requirements.

Description

technical field [0001] The invention relates to the technical field of crop breeding, in particular to a breeding method for PLR germplasm of a new group of maize. Background technique [0002] Corn is an important food crop in the world and has an important strategic position in food security; it is also an important raw material for processing industries. These three types of germplasm are the main breeding germplasm in my country, and their main advantages and disadvantages are as follows: [0003] Group P (78599): The main inbred lines of this type of germplasm: 9195, P178, P138, Qi 319, etc., have semi-compact plant type and loose leaf-dripping type, and show good resistance to corn leaf spot disease, namely It is good to keep green. Most of the assembled hybrids are tall and dehydrated slowly, and severe inversion (lodging) and rot will occur if they encounter strong winds or overcast rain during the ripening period. [0004] Lan. germplasm is an important maize ger...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04
Inventor 王安贵陈泽辉祝云芳郭向阳吴迅刘鹏飞
Owner 贵州省旱粮研究所
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