Breeding method for maize inbred line

Abstract

The invention relates to a preparation method for maize hybrids, belonging to the technical field of agricultural new species breeding. By taking MW94 line 449 as a female parent and ETO germ plasm as a male parent, a single hybrid is obtained through hybridization. By taking the single hybrid as a female parent and Luda red cob 340 as a male parent, a triple hybrid is obtained through hybridization. Superior plants are selected after two generations of continuous inbreeding. MW94 line 449 is used as a male parent for hybridization to obtain a base material. Then six generations of inbreeding are conducted to obtain an inbred line 216. The inbred line 216 of the invention has the advantages that a plurality of kinds of diseases such as gray speck can be resisted, the hereditary character is stable and the combining ability is strong, and is a superior inbred line for the preparation of maize hybrids.

Description

technical field

[0001] The invention relates to a seed production technology of corn hybrids, and belongs to the technical field of new agricultural seed breeding. Background technique

[0002] Maize inbred lines are the basis for the use of hybrid vigor and the preparation of hybrids in maize. Maize has corresponding adaptability to the environment. To prepare maize hybrids with high yield, high quality, multi-resistance and wide adaptability, breeding inbred lines with excellent genetic characteristics is the key work. However, due to the increase of the breeding generation and the increase of the use time of the inbred line, there will be phenomena such as weakened vitality, reduced disease resistance, and reduced reproductive yield, resulting in poor disease resistance and low yield of the prepared hybrids. Therefore, there is an urgent need to breed new maize inbred lines in agricultural production to meet the needs of formulating new hybrids. Contents of the inventi...

Examples

Embodiment

[0023] Seed Production Technology of Inbred Line 216

[0024] The basic method of seed production: use Mobai 94 selected line 449 as the female parent, ETO germplasm as the male parent to cross a single cross; then use the single cross as the female parent, Luda Honggu (Dan 340) as the male parent A basic material was obtained by crossing, and the superior plants were selected by continuous self-crossing for 2 generations; then the selected line 449 of Mobai 94 was used as the male parent to cross with the superior plants to obtain a basic material, and then self-crossed for 6 generations.

[0025] 1. Land selection and isolation area setting: Select land with medium or higher fertility and irrigation conditions as the farming field. For safe isolation, there must be no other corn varieties within 500 meters of the breeding inbred line.

[0026] 2. Sowing at the right time: When the soil temperature stabilizes above 10°C, it should be sown in time. Spring sowing in Yunnan is ...

technical field

[0001] The invention relates to a seed production technology of corn hybrids, and belongs to the technical field of new agricultural seed breeding. Background technique

[0002] Maize inbred lines are the basis for the use of hybrid vigor and the preparation of hybrids in maize. Maize has corresponding adaptability to the environment. To prepare maize hybrids with high yield, high quality, multi-resistance and wide adaptability, breeding inbred lines with excellent genetic characteristics is the key work. However, due to the increase of the breeding generation and the increase of the use time of the inbred line, there will be phenomena such as weakened vitality, reduced disease resistance, and reduced reproductive yield, resulting in poor disease resistance and low yield of the prepared hybrids. Therefore, there is an urgent need to breed new maize inbred lines in agricultural production to meet the needs of formulating new hybrids. Contents of the inventi...

Examples

Embodiment

[0023] Seed Production Technology of Inbred Line 216

[0024] The basic method of seed production: use Mobai 94 selected line 449 as the female parent, ETO germplasm as the male parent to cross a single cross; then use the single cross as the female parent, Luda Honggu (Dan 340) as the male parent A basic material was obtained by crossing, and the superior plants were selected by continuous self-crossing for 2 generations; then the selected line 449 of Mobai 94 was used as the male parent to cross with the superior plants to obtain a basic material, and then self-crossed for 6 generations.

[0025] 1. Land selection and isolation area setting: Select land with medium or higher fertility and irrigation conditions as the farming field. For safe isolation, there must be no other corn varieties within 500 meters of the breeding inbred line.

[0026] 2. Sowing at the right time: When the soil temperature stabilizes above 10°C, it should be sown in time. Spring sowing in Yunnan is ...

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