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Breeding method of corn DH line tong 15D969 with ultra-large ear row number

A technology of multi-ear row and ear row number, which is applied in the field of breeding of maize DH line Tong 15D969 with super multi-ear row number

Active Publication Date: 2016-12-07
通化市农业科学研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Regarding the cutting-edge research on the number of rows of corn ears, the current good progress can only reach 20-22 rows, and there is no substantial breakthrough from the widely promoted corn varieties with 16-18 rows of ears, but even 20-22 rows of ears The number of corn varieties is also very rare

Method used

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  • Breeding method of corn DH line tong 15D969 with ultra-large ear row number
  • Breeding method of corn DH line tong 15D969 with ultra-large ear row number
  • Breeding method of corn DH line tong 15D969 with ultra-large ear row number

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Embodiment 1

[0025] The present embodiment 1 specifically provides a breeding method of corn DH line Tong 15D969 with a super multi-ear row number, which is as follows:

[0026] The first step: In July 2013, maize A6 was used as the female parent, and maize PHB1M and other maize varieties were used as the male parent. A total of more than 10 female and male parent combinations were used, and each combination was combined with 20kg each. More than 10 female-parent combinations were planted and cultivated in Nanbin Farm District, Sanya, Hainan in the winter of 2013, and the comprehensive resistance of these more than 10 female-parent combinations was identified. Finally, A6×PHB1M performed the best, and the panicle row The number is 22 rows, and the single-cross F1 seeds obtained from the combination of A6×PHB1M are used in the next step of cultivation.

[0027] A6 and PHB1M can be purchased from the market, or can be cultivated and selected by the following methods:

[0028] Breeding of A6...

Embodiment 2

[0039] This embodiment 2 provides a further extended and improved corn DH line 15D969 breeding method on the basis of Example 1, specifically: when the seeds of the corn DH line Tong 15D969 obtained in Example 1 are planted , plant according to the following layout: Plant according to the "wide, wide and narrow row cycle interval" method when planting, the row spacing of wide rows is 95cm, and the row spacing of narrow rows is 65cm, that is, according to the row spacing "95cm, 95cm, 65cm", "95cm, 95cm, 65cm", "95cm, 95cm, 65cm", ... in the form of alternating planting cycles. The two rows of corn on both sides of the narrow row are sparsely planted rows, and the distance between the adjacent corn planting holes in each sparsely planted row is 35 cm. In each sparsely planted row, corn is planted in the manner of "two plants between four plants", and the " "Between four plants and two" is to plant two corn plants in the next corn planting hole of every four corn planting holes, ...

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Abstract

The invention belongs to the technical field of corn variety breeding, and particularly relates to a breeding method of a corn DH line tong 15D969 with the ultra-large ear row number. The method mainly comprises the several steps that a single crossing hybrid is cultivated by matching corn A6 with corn PHB1M, haploid is obtained by inducing the single crossing hybrid, planting reduplication is conducted to obtain a corn DH line, and the corn DH line tong 15D969 is obtained through screening. According to the corn DH line tong 15D969 obtained through the breeding method, the ear row number is stably 30 and is far more than the ear row number 14 to 18 of a common corn variety, and correspondingly, the corn yield per mu is significantly increased; meanwhile, the corn DH line tong 15D969 bred through the method has the good comprehensive characters including but not limited to the lodging resistance, the eurytopicity, the yielding ability and the like.

Description

technical field [0001] The invention belongs to the technical field of maize variety breeding, and in particular relates to a breeding method of maize DH line Tong 15D969 with a super multi-ear row number. Background technique [0002] The number of ear rows is an important factor to determine the yield of maize. At present, the number of ear rows of corn single-cross varieties popularized and applied in my country is mostly 16-18 rows. [0003] Regarding the cutting-edge research on the number of rows of corn ears, the current good progress can only reach 20-22 rows, and there is no substantial breakthrough from the widely promoted corn varieties with 16-18 rows of ears, but even 20-22 rows of ears The number of corn varieties is also very rare. [0004] To sum up, how to cultivate maize varieties with substantial breakthroughs in the number of ear rows through appropriate breeding methods, so as to greatly increase maize yield, is an urgent problem to be solved in the fie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/04A01H1/02
CPCA01H1/02A01H1/04
Inventor 李忠南牛兆国李光发王越人邬生辉许正学张艳辉
Owner 通化市农业科学研究院
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