Method for rapid screening of garden establishment parent materials of cedar seed garden

Abstract

The invention provides a method for rapid screening of garden establishment parent materials of a cedar seed garden. The method comprises the following steps: conducting open pollination on candidateparents of a garden establishment region in a control area; obtaining a filial generation of each parent after the open pollination through monophyletic seed collection; using an SNP molecular markerfor genotyping of the parents and the filial generations so as to determine the parents of which the filial generations are dominant; and determining the parent materials for garden establishment according to traits of blossom and growth. Forest trees have large genomes in general. The method rapidly detects characteristics of differences of genomes among forest plant individuals with the SNP molecular marker and is characterized by fast screening, a large processing amount, high polymorphism, high stability and a wide coverage scope.

Description

technical field [0001] The invention relates to the technical field of forestry, in particular to a rapid screening method for parent materials for constructing Chinese fir seed orchards. Background technique [0002] Chinese fir( Cunninghamia lanceolata (Lamb.) Hook.) has survived on the earth for 700,000 years and has been exploited and utilized by humans for more than 2,000 years. Fir has many advantages such as fast growth, good material properties, and wide application. Its distribution range is very wide, covering 17 subtropical provinces (regions) in my country. The tree seed orchard is a plantation established from artificially selected excellent tree clones or progeny families, and it is an important link in tree breeding. Since the 1960s, forest seed gardens have been generally established in countries all over the world, and my country has established fir clone seed gardens since 1964. According to incomplete statistics, more than 50 countries have established ...

AI Technical Summary

Problems solved by technology

At present, forest seed gardens in various countries in the world have many problems such as low yield and instability, but they are still regarded as an indispensable means by the breeding community

[0003] The construction of Chinese fir seed orchards first started in the mid-1960s. At present, Chinese fir has entered the construction of the fourth generation of seed orchards, but the problem of seed orchard output has not been resolved.

In the construction of seed orchards, the number of parents is blindly pursued to maintain genetic diversity, etc., resulting in an extremely low number of effective parents in the seed orchard

Therefore, the yield of Chinese fir seed orchards has generally been too low for a long time

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