Method for breeding new breed of pear of self-pollination and bear fruit

A new germplasm and self-flowering technology, applied in the direction of botany equipment and methods, application, plant gene improvement, etc., can solve the problems of late start, restriction of self-fertile varieties selection, and inability to screen out new germplasm, and achieve The effect of low investment and wide application prospects

Inactive Publication Date: 2005-01-05
NANJING AGRICULTURAL UNIVERSITY
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Problems solved by technology

According to the current situation analysis, the reasons for the lack of pear self-fertilizing varieties are the following key problems: First, the research on the mechanism of pear self-fertilizing and non-fruiting and the genetic characteristics of self-fertilizing started relatively late, involving Some theoretical issues such as the genetic characteristics of self-fertilization have not been clarified, so there is a certain degree of blindness in the breeding practice of selecting hybrid parents, etc. The plants are mixed or have only self-fertile offspring, so it is impossible to screen out new germplasm with self-fertilization; secondly, there are still few self-fertile varieties with known S genotypes, only 'Oh 20th century', its S genotype is S 2 S 4 SM , was selected from the bud mutation selection

Method used

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  • Method for breeding new breed of pear of self-pollination and bear fruit
  • Method for breeding new breed of pear of self-pollination and bear fruit
  • Method for breeding new breed of pear of self-pollination and bear fruit

Examples

Experimental program
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Embodiment Construction

[0037] 1. Materials and methods

[0038] 1.1 Test material

[0039] The high-quality early-maturing pear variety 'Bali' or 'Changshilang' with known S genotype was selected as the female parent (♀), and the self-fertilizing variety 'Aoga 20th Century' was used as the male parent (♂) for cross-pollination test. Because the S genotype of 'Bali' is S 2 S 5 , the S genotype of 'Changjuro' is S 2 S 3 , they all contain an S 2 Gene, so that the "August 20th Century" containing S 2 The pollen of the gene cannot be fertilized, only S 4 sm Pollen completes fertilization, and all offspring contain S 4 sm Gene, therefore, the progeny of these hybrid combinations are self-fertile.

[0040] 1.2 Hybrid combination

[0041] 1) Combination 1: A hybrid combination with 'Bali' as the female parent (♀) and the autofertile variety 'Aoga 20th Century' as the male parent (♂). The hybrid combination obtained a total of 6547 hybrid seeds, and the hybrid was stratified and seeded to obtai...

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Abstract

A method for breeding the new pear germplasm with self pollination features that the earier ripe pear 'Bali' whose S gene type is S2S5 or 'Changshilang' whose S gene type is S2S3, and the pear 'Aogaershishiji' with self pollination are used to hybridize to obtain two excellent lines '98-19-117' and '99-6-39', whose self pollination is more than 70%.

Description

1. Technical field [0001] The invention relates to a method for cultivating new pear self-fertile germplasm, which belongs to an innovative method for pear self-fertile germplasm, and is specially used for cultivating fruit tree self-fertile varieties. 2. Technical background [0002] Pear (Pyrus) is the main fruit tree planted in the world and in my country. my country's existing cultivated area is about 1,026,400 hectares, with an output of 8,796,100 tons (according to the 2002 China Agricultural Yearbook), ranking third after apples and citrus. Pear trees are gametophytic self-flowering fruit trees, and the self-pollination and fruit-setting rate of most varieties is very low. In production, pollination varieties must be rationally allocated or artificial cross-pollination can be normal fruiting, especially in pear orchards cultivated in protected areas. higher requirements. Artificial pollination requires a lot of labor to collect or purchase pollen. Even so, it is oft...

Claims

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Application Information

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IPC IPC(8): A01H1/02
Inventor 张绍铃徐义流周建涛赵彩平吴华清陈迪新吴俊
Owner NANJING AGRICULTURAL UNIVERSITY
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