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Method for establishing multi-stem multi-ear black flower corn selfing line breeding

An inbred line and corn technology, applied in the direction of botany equipment and methods, applications, plant genetic improvement, etc., can solve the problems of narrow corn planting foundation, and achieve the effects of easy grasp and implementation, high selection efficiency, and simple application

Inactive Publication Date: 2014-07-02
范起元
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the continuous introduction and innovation of corn planting, invisible mutual penetration has occurred between planting, so that the basis of corn planting is becoming narrower and narrower

Method used

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  • Method for establishing multi-stem multi-ear black flower corn selfing line breeding
  • Method for establishing multi-stem multi-ear black flower corn selfing line breeding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: Original Seed Farm in Caohe Town, Xushui, Hebei Province from April to October 2003

[0029] A method for creating a multi-stem and multi-ear black-flowered corn inbred line, the specific steps of the method are as follows:

[0030] Step 1: Environmental Induction

[0031] The Mexican annual diploid maize is selected for artificial environment induction. The induction method is to artificially manufacture a darkroom. From the emergence of the seedlings, 12 hours of light is given every day, so that the Mexican annual diploid maize can bloom at the same time as the local maize cultivars;

[0032] Step 2: Hybrid import

[0033] While environmental induction is carried out to Mexican annual diploid corn, sowing 10 corn cultivars can make inbred lines, and each female parent corn cultivar is sown for 3 phases, with an interval of 12 days, and the flowering period is as usual in corn. The bagging pollination method of hybrid breeding uses corn cultivars as the f...

Embodiment 2

[0054] (2) Comparative experiment between Hebei Xushui No. 1 and the imported Mexican annual diploid maize (male parent) and local maize (female parent)

[0055] a. Comparison of phenological periods

[0056] The results of the phenological phases of the variety comparison experiments are sorted out, see Table 1.

[0057] Table 1 The survey results of the phenological periods of each variety

[0058]

[0059] The results showed that, under the conditions of planting in April in Hebei, the three maize varieties compared in the experiment took 60-70 days from seedling emergence to ear emergence, and about 30 days for main ear to mature.

[0060] b. Comparison of main characters

[0061] The main agronomic and economic traits of each variety obtained in the experiment are shown in Table 2.

[0062] Table 2 Comparison of main characters of each variety

[0063] Variety

Plant height (cm)

pcs / ear

Main panicle length (cm)

branching ability

(local...

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Abstract

The invention discloses a method for establishing multi-stem multi-ear black flower corn selfing line breeding. The method specifically comprises the following steps: 1, environment induction, namely, artificially cultivating, wherein the cultivation time is firstly calculated and then planting is performed, so that zea mexicana and black guanyin corn bloom at the same time; 2, hybridization introduction, namely, hybridizing through an ordinary hybridization bagging method by using a cultispecies as a female parent and annual diploid zea mexicana as a male parent; 3, backcross improvement, namely, using the female parent cultispecies corresponding to F1 as the female parent, backcrossing F1 pollen mixture and the female parent to obtain BC1 seeds, seeding BC1, and backcrossing the BC pollen mixture and the female parent for the second time, so as to obtain backcrossed second-generation BC2 seeds; 4, genealogy breeding, namely, breeding the BC2 seeds, preferably selecting a single plant, and performing continuous selfing of multiple generations so as to obtain a stable system; 5, test cross selecting, namely, hybridizing the stable selected system as the female parent with tested pollen, planting and identifying hybridization combination, and comparing to select excellent combination.

Description

technical field [0001] The invention belongs to the technical field of corn breeding, in particular to a method for creating multi-stalk and multi-ear black flower corn inbred line breeding. Background technique [0002] Corn is one of the three major food crops (rice, wheat, corn) in China, with an annual planting area of ​​nearly 400 million mu, and its total and per unit yield ranks second among food crops: corn is also the main livestock feed and important food , medicine, and industrial raw materials, therefore, corn plays a pivotal role in my country's national economic and social development. In the past 30 years, the level of corn technology in my country has been significantly improved, and the yield per unit area and total yield have nearly doubled, among which the genetic gain due to variety improvement has played a leading role. [0003] The characteristics of maize variety improvement in my country mainly include the relay improvement of foreign populations, the...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01H1/04
Inventor 范起元马菊花赵天林王青吴子华
Owner 范起元
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