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Method for breaking through distant hybridization incompatibility of catalpa bungei and catalpa ovata

A technology of distant hybridization and catalpa, applied in the field of agriculture, can solve the problems of incompatibility and infertility of distant hybridization breeding

Active Publication Date: 2021-05-11
LUOYANG ACADEMY OF AGRI & FORESTRY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main problem in distant hybrid breeding is the phenomenon of incompatibility, that is, the inability to fertilize and set fruit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for breaking through the incompatibility of distant hybridization of Catalpa catalpa, comprising the following steps:

[0032] Step 1: Cultivate dwarf rootstocks; choose to sow catalpa seeds in plastic greenhouses in the spring of the first year, the ambient temperature is controlled at 20°C, the humidity is 50%, and the temperature and humidity are controlled to make them germinate and emerge. The mature seedlings are moved into the field when the temperature and humidity in the shed are gradually approaching the field environment, topping is timely during the growth period, side branches are promoted, and catalpa dwarf rootstocks are cultivated;

[0033] Step 2, collecting flower branches; from November to mid-March of the second year after the flower buds are formed, collect strong flower branches (twigs with flower buds) from the female catalpa and male catalpa for hybridization, and store them in low temperature Standby in the cold storage, wherein the tem...

Embodiment 2

[0043] A method for breaking through the incompatibility of distant hybridization of Catalpa catalpa, comprising the following steps:

[0044] Step 1. Cultivate dwarf rootstocks; choose to sow catalpa seeds in plastic greenhouses in the spring of the first year, the ambient temperature is controlled at 30°C, the humidity is 75%, and the temperature and humidity are controlled to make them germinate and emerge. The mature seedlings are moved into the field when the temperature and humidity in the shed are gradually approaching the field environment, topping is timely during the growth period, side branches are promoted, and catalpa dwarf rootstocks are cultivated;

[0045] Step 2, collecting flower branches; from November to mid-March of the second year after the flower buds are formed, collect strong flower branches (twigs with flower buds) from the female catalpa and male catalpa for hybridization, and store them in low temperature Standby in the cold storage, wherein the tem...

Embodiment 3

[0055] A method for breaking through the incompatibility of distant hybridization of Catalpa catalpa, comprising the following steps:

[0056] Step 1: Cultivate dwarf rootstocks; in the spring of the first year, choose to sow the seeds of catalpa in plastic greenhouses, the ambient temperature is controlled at 25°C, the humidity is 60%, and the temperature and humidity are controlled to make them germinate and emerge. The mature seedlings are moved into the field when the temperature and humidity in the shed are gradually approaching the field environment, topping is timely during the growth period, side branches are promoted, and catalpa dwarf rootstocks are cultivated;

[0057] Step 2, collecting flower branches; from November to mid-March of the second year after the flower buds are formed, collect strong flower branches (twigs with flower buds) from the female catalpa and male catalpa for hybridization, and store them in low temperature Standby in the cold storage, wherein...

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PUM

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Abstract

The invention discloses a method for breaking through distant hybridization incompatibility of catalpa bungei and catalpa ovata. The method comprises the following steps that S1, dwarf rootstocks are cultivated, seeds of catalpa ovata are sown in spring of the first year, temperature and humidity are controlled to enable catalpa ovata to germinate, and stocks are cultivated; and S2, flowering branches are collected, robust flowering branches are collected from female parent catalpa bungei and male parent catalpa ovata which are used for hybridization from November after flower buds are formed to the middle ten days of March of the next year and stored in a low-temperature refrigeration house for standby application. According to the method, the problem that catalpa bungei and catalpa ovata distant hybridization is incompatible can be solved, the method is used for distant hybridization of catalpa bungei and catalpa ovata of the campsis family, and creating and utilizing heterosis, the excellent characters and characteristics of the catalpa bungei and the catalpa ovata in two different genera are combined, the boundary of species and genera is broken through, genetic variation is expanded, new variation types or new species are created, and the method has the advantages of being high in hybridization success rate and good in quality.

Description

technical field [0001] The invention belongs to the field of agricultural technology, and in particular relates to a method for breaking through the incompatibility of distant hybridization of catalpa catalpa. Background technique [0002] Catalpa is known as the "King of Wood". It has excellent material and wide range of uses. It is an ecological and economical landscaping special timber species integrating timber and ornamental. After years of cross-breeding, some better inter-specific and intra-specific hybrid varieties of catalpa have been selected and bred in terms of ornamental, material, and resistance, such as "Rowan No. 1" (intra-specific hybrid), "Zinnia Catalpa" (interspecific hybrid). However, catalpa, which is quite excellent in material and resistance, is currently only used as a rootstock for grafting catalpa in production practice, and the excellent properties of catalpa cannot be combined into the body of catalpa for utilization by catalpa. Only by making ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01G17/00A01G7/06A01G2/30
CPCA01H1/02A01G17/005A01G7/06A01G2/30
Inventor 赵鲲麻文俊焦云德杨艳红张华锋张海让王艳让张建祥李关锋姚汉辉闫立红李舞符红亚
Owner LUOYANG ACADEMY OF AGRI & FORESTRY SCI