Method for producing maize hybrid seed

A production method and hybrid technology, which are applied in the field of corn hybrid seed production, can solve the problems of weak disease resistance, poor barren tolerance, and unsuitability for high-altitude mountainous areas, and achieve strong stress resistance, strong barren tolerance, High quality and high yield

Inactive Publication Date: 2010-05-19
YUNNAN SHIFENG SEED IND
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The local people have the habit of eating white corn. The Luodan 5 variety planted for many years has poor barren resistance and weak disease resistance. It is not suitable for planting in high-altitude mountainous areas and has affected the development of food production.

Method used

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  • Method for producing maize hybrid seed
  • Method for producing maize hybrid seed
  • Method for producing maize hybrid seed

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Experimental program
Comparison scheme
Effect test

Embodiment

[0030] 1. The hybrid seed production steps of "Ludan 7":

[0031] 1. Land selection and isolation area setting: Select fields with medium or higher fertility, and use irrigation conditions as crop fields. For safe isolation, the breeding inbred line should be more than 500m; the hybrid seed production should be more than 300m.

[0032] 2. Sowing at the right time: Sowing can be done when the soil temperature has stabilized above 10°C. Spring sowing in Yunnan is generally done in late March.

[0033] 3. Reasonable dense planting: Calculated based on the mixed area, 4,000 seedlings for the female parent and 1,000 seedlings for the male parent per mu. The appropriate parent-to-bank ratio is 1:4.

[0034] 5. Adjustment of the sowing date of the parents: the parents sow at the same time.

[0035] 6. Removal of impurities and emasculation: In order to ensure the purity of hybrids, remove impurities three times at the seedling stage, jointing stage, and before tasseling and loosen...

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Abstract

The invention discloses a method for producing Ludan NO.7 hybrid seed of an infertility-resistant, disease-resistant and wide-adaptation white maize variety, and belongs to the field of maize heterosis utilization. The method comprises the following steps that inbred line black 255 and inbred line Qing 795 are selected through a multi-generation inbred purification method, and the inbred line black 255 serving as a male parent and the inbred line Qing 795 serving as a female parent are prepared into the Ludan NO.7 hybrid seed; the inbred line Qing 795 is selected from Guizhou local race Qinglong Wusuibai through six-generation inbreeding, the inbred line black 255 is a inbred line formed by replanting a NO.1 black-white colony introduced from Mexico, inbreeding and selecting the NO.1 black-white colony through five generation and hybridizing the NO.1 black-white colony and B255 to form single cross hybrid, and then inbreeding and selecting the single cross hybrid through continuous 6 generations; and the B255 is a species introduced from America. The Ludan NO.7 hybrid seed prepared by the method have the characteristics of good quality, high yield, disease resistance, infertility resistance, wide adaptability and the like, and is an ideal variety for the current maize production.

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] Corn is the main food crop in Yunnan. The terrain of Yunnan is undulating, the three-dimensional climate is obvious, and the ecological types are diverse. Most of the plots for planting corn are dry land and slope land, with poor soil and heavy dampness and diseases. The local people have the habit of eating white corn. The Luodan 5 variety planted for many years has poor barren resistance and weak disease resistance. It is not suitable for planting in high-altitude mountainous areas and has affected the development of food production. Therefore, there is an urgent need to breed new varieties to meet the needs of local production and ecological conditions for maize varieties. Contents of the invention [0003] The technical problem to be solved by the present invention is to provi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04
Inventor 雷明增赵吉奎杨云芬
Owner YUNNAN SHIFENG SEED IND
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