MySheen

Tea cross breeding

Published: 2024-11-05 Author: mysheen
Last Updated: 2024/11/05, The variation of hybrid population was produced by sexual hybridization of tea parents with different genetic characteristics, and then selected to cultivate a new tea variety breeding method. The selection of hybrid parents is related to the success or failure of cross breeding and the level of cross breeding. The general principles are: the parental traits of ① can learn from each other, and the good characters should be outstanding; the adaptability of ② parents to local environmental conditions, especially the materials selected as female parents should have strong adaptability; the flowering period of ③ parents should be consistent, and the knot of female parents should be more consistent.

The variation of hybrid population was produced by sexual hybridization of tea parents with different genetic characteristics, and then selected to cultivate a new tea variety breeding method.

The selection of hybrid parents is related to the success or failure of cross breeding and the level of cross breeding. The general principle is:

The parental traits of ① can learn from each other, and the good characters should be outstanding.

The adaptability of ② parents to local environmental conditions, especially the materials selected as female parents, should have strong adaptability.

The flowering period of ③ parents should be the same, and the fruiting ability of female parents should be stronger.

The main traits required by ④ breeding objectives should have outstanding performance and high heritability in at least one parent.

According to the genetic relationship and ecotype of ⑤ parents, the genetic basis of their offspring is richer and the probability of super-parents is higher when the parents with distant genetic relationship or different ecotypes are crossed.

In tea cross breeding, simple crossing and backcrossing are two main methods. The selection of hybrid offspring mainly adopts the method of single plant selection, which should start from the seedling stage. The selection at seedling stage is based on some related traits. The hybrid progenies with good rooting performance, moderate height of tea seedlings, more branches and leaves, medium leaf size, long vegetative growth period, strong axillary bud germination and strong stress resistance often have great hope to develop high and stable yield varieties.

For the selected excellent individual plants or types, cutting propagation should be carried out in time, and the strain comparison test should be arranged.

 
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