Method for reducing juvenile period of hybrid tangerine

A technology of citrus and hybrids, applied in botany equipment and methods, seed and rhizome treatment, horticulture, etc., can solve the problems of long hybrid breeding cycle and affecting the length of hybrid citrus childhood, so as to improve breeding efficiency, shorten the breeding cycle, The effect of speeding up the process

Inactive Publication Date: 2010-11-17
CITRUS RES INST SOUTHWEST UNIV
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Regarding the method for cultivating hybrid citrus varieties in the prior art, it all goes through the seedling stage (seedling refers to the sapling formed by seed germination, which is thus different from the seedlings that come from grafting), grafting seedling stage and post-management, etc. stage, these stages will affect the length of childhood of hybrid citrus, and the hybrid breeding cycle of existing methods is all relatively long

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In this example, Shiranui Tangerine was used as the test material, and it was sown and cultivated in January 2006. Among them, Shiranui Tangerine was bred by crossing Kiyomi Tangerine and Nakano No. 3 Lukan, and was introduced to China from Japan in 1992. This variety is a strictly polyembryonic variety, that is, the genetic material of the seedlings cultivated from all seeds is highly consistent. During the breeding process of this variety in Japan, its childhood period is 5 years.

[0026] The steps of this embodiment are:

[0027] 1) Cultivation of hybrid seedlings: harvest fully mature Shiranui orange seeds, peel off the outer and inner seed coats of the seeds, and cultivate seedlings without soil in an incubator. Specifically: in a rectangular parallelepiped plastic incubator of 15×15×30 cm, the bottom of the box is covered with sterile filter paper with a thickness of 10 cm. After wetting with tap water, keep the bottom of the box with water at a depth of 1 cm. C...

Embodiment 2

[0039] In this example, Chunjian Tangerine was used as the test material, and it was sown and cultivated in January 2006. Chunjian Tangerine was bred by crossing Qingjian Tangerine and Lugan F-2432, and was introduced to China from Japan in 2002. This variety is a strictly polyembryonic variety, that is, the genetic material of the seedlings cultivated from all seeds is highly consistent. During the breeding process of this variety in the origin of Japan, its childhood period is 5 years.

[0040]1. Cultivation of hybrid seedlings: Harvest fully mature Chunjian orange seeds, peel off the outer and inner layers of seed coats of the seeds, and cultivate seedlings without soil in the incubator. Specifically: in several 15×15×30 cm rectangular parallelepiped plastic incubators, the bottom of the box is covered with sterile filter paper with a thickness of 10 cm. After wetting with tap water, keep the bottom of the box with water at a depth of 0.8 cm. There are 150 seeds of the ski...

Embodiment 3-14

[0052] With 12 citrus varieties hybrid seeds described in the following table 4, adopt the operation method identical with embodiment 1, cultivate;

[0053] The infancy of 12 citrus varieties and their corresponding number of plants (unit: strain) in table 4 embodiment 3-14

[0054] implement

[0055] Conclusion: It can be known from the above table 4 that this method shortens the childhood period of more than 70% of the hybrid citrus to less than 2 years, and the remaining period is 3 years, thereby speeding up the process of citrus breeding, and no adverse effects were found during the experiment.

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PUM

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Abstract

The invention relates to a method for reducing juvenile period of hybrid tangerine, which comprises the following steps: culturing hybrid seedlings till the hybrid seedlings grow two true leaves and two stages of roots; performing high grafting of the hybrid seedlings onto tangerine branches which have closer relationships with grafts, is free from diseases and insects and 100 centimeters above the ground and have diameters more than 3 centimeters; and finally, performing final-period management such as tree shape control and girdling for promoting promoting flower-formation. When the method is used, the juvenile period of hybrid tangerine trees is reduced to about 2 years, and the juvenile period of some hybrid tangerine trees is reduced to 1 year. Compared with the conventional cultivation method of hybrid tangerine breeding seedlings, the method has the advantages of greatly reducing breeding period and accelerating the breeding of tangerine hybridization breeding.

Description

technical field [0001] The invention relates to hybrid breeding of citrus, in particular to a method for shortening the childhood period of hybrid citrus. Background technique [0002] Citrus hybrid breeding technology can fundamentally use gene recombination to make new hybrid citrus varieties integrate the advantages of both parents and have the excellent traits of both parents. However, the long breeding cycle of traditional hybrid citrus is mainly due to the long childhood of citrus. Citrus childhood refers to the number of years that a citrus takes from seed sowing to flowering. Under normal circumstances, after the citrus seeds are sown, it will not start to bloom until the seventh or eighth year, that is, the childhood period of citrus is 7 to 8 years. In addition to the follow-up observation of horticultural traits and identification of genetic stability, a hybrid can be bred. Citrus varieties take an average of more than 18 years to mature. This feature has greatl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G17/00A01C1/00A01G1/06
Inventor 曹立彭良志淳长品江才伦
Owner CITRUS RES INST SOUTHWEST UNIV
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