Method for rapidly passivating photosensitivity of tropical/subtropical maize germplasm

A corn technology in subtropical regions, applied in the field of breeding, can solve the problems of slow domestication process, inability to completely eliminate residual germplasm in the donor system, low efficiency, etc., to achieve excellent results, ensure continuous innovation and stable sustainable development, and improve breeding. The effect of efficiency

Active Publication Date: 2017-08-15
BEIJING ACADEMY OF AGRICULTURE & FORESTRY SCIENCES
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Problems solved by technology

However, these methods all need 5-6 years or longer, the domestication process is slow, and the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Select the temperate maize backbone inbred lines Jing 2416 and Zheng 58 as the recipient basic materials based on the heterogeneous groups, select the tropical germplasm SUWAN 1 as the donor, and plant them in Hainan. After flowering, the temperate maize inbred lines Jing 2416 and Zheng 58 was the female parent, and the tropical / subtropical material SUWAN 1 was used as the male parent to cross the two. After maturity, hybrid seeds Jing 2416×SUWAN 1 and Zheng 58×SUWAN 1 were harvested.

[0029] (2) The hybrid seeds Jing 2416×SUWAN 1 and Zheng 58×SUWAN 1 were planted in temperate regions such as Beijing, Shanxi, Liaoning, Heilongjiang, etc., and at the same time planted the improved germplasm derived from maize induced haploid induction Stock6, which has obvious grain markers The maize haploid induction line Jingkeyu 044, which has the advantages of strong growth potential, good pollination, and sufficient pollen amount, etc.

[0030] (3) At the flowering stage, the ...

Embodiment 2

[0038] The inbred line Beijing SV19.

[0039] 1. Source of parents

[0040] The inbred line Beijing SV19 is a self-selected line of the Maize Research Center of Beijing Academy of Agriculture and Forestry Sciences. It is bred by DH breeding technology with Suwan1×PH4CV as the basic material. This inbred line can be released to the public.

[0041] 2. Breeding process

[0042] In October 2009, 20 tropical germplasm Suwan1 were screened and identified in Hainan, and the hybridization of Suwan1 and PH4CV was completed. After the hybrid F1 is mature, it is mixed and threshed, and used as the basic material for line selection.

[0043] In May 2010, 100 F1 plants were planted in Beijing at a density of 4000 plants / mu, and 20 corn haploid induction lines Jingkeyu 045 were planted at the same time. During the flowering period, the two are crossed. After maturity, 80 hybrid fruit ears were harvested. And according to the purple mark on the top of the grain embryo and endosperm, 11...

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Abstract

The invention relates to the technology of seed breeding, and in particular discloses a method for rapidly passivating the photosensitivity of tropical/subtropical maize germplasm. By combining biology seed breeding technologies including a DH seed breeding technology, a DNA molecular marker technology and the like, the method for rapidly passivating the photosensitivity of the tropical/subtropical maize germplasm is provided; the tropical/subtropical germplasm is introduced into temperate-zone germplasm through four generations in two years, and a completely homozygous high-quality maize inbred line (DH line) is obtained, so that the tropical/subtropical maize germplasm is rapidly introduced into the temperate-zone germplasm; the seed breeding efficiency is improved, and the stable and sustainable development of seed breeding work is ensured.

Description

technical field [0001] The invention relates to breeding technology, in particular to a method for quickly inactivating the photosensitivity of tropical / subtropical maize germplasm. Background technique [0002] Tropical / subtropical maize germplasm is a unique maize germplasm group with good lodging resistance, drought tolerance, disease and insect resistance, etc. It can be used as an excellent material to broaden the temperate maize germplasm base and further improve temperate maize germplasm agronomy traits, enhanced disease resistance and adaptability. However, tropical / subtropical maize germplasm has strong light sensitivity when planted in temperate regions, which will cause delays in growth and flowering stages, and even fail to reproduce, so it is difficult to use directly. It is necessary to passivate its photosensitivity through introduction, domestication and genetic improvement. [0003] At present, the commonly used tropical / subtropical maize germplasm domesti...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01H1/04
CPCA01H1/02A01H1/04
Inventor 段民孝赵久然刘新香王元东邢锦丰张华生张雪原张如养
Owner BEIJING ACADEMY OF AGRICULTURE & FORESTRY SCIENCES
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