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Cascaded selection method suitable for novel tobacco strain breeding

A new line and cascade technology, applied in the fields of botanical equipment and methods, application, plant genetic improvement, etc., can solve the problems of heavy burden, neglect of selection of tobacco plant growth traits and morphological traits, and heavy workload, so as to reduce the number of experiments. The effect of land area, reducing the number of selected materials, and reducing the workload

Active Publication Date: 2019-04-12
HUBEI TOBACCO SCI RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are at least the following three problems in this method of selection of hybrid progeny materials: one is that the identification of disease resistance is too late
If the identification of disease resistance is too late, it will lead to long-term planting of materials with unknown disease resistance, which is a heavy burden. In the end, those materials that are not resistant to disease will inevitably be eliminated, wasting energy, material and financial resources
The second is to ignore the selection of tobacco plant growth traits and morphological traits
Regrettably, the technicians of the breeding unit often only perform simple selection on a few traits such as growth vigor, plant type, plant height, leaf number, and pitch in the segregation generation of the hybrid offspring, while other large numbers of tobacco plants grow The traits and morphological traits are observed in the comparison test of the later generation strains or after the strains are formed, and are treated as the botanical characteristics of the new strains, and the growth traits and morphological traits of these tobacco plants are not compared with the early selection of breeding materials. link up
Third, the burden is heavy and the workload is heavy
At present, because the technicians of the breeding unit did not select the disease resistance and the growth traits and morphological traits of most of the tobacco plants in the earlier generation of the hybrid offspring, they only selected the growth potential, plant type, plant height, Few traits such as leaf number and pitch are selected in the segregation generation group (generally F2-F5 generation) of hybrid offspring. On the one hand, it will lead to more and more selected materials and more and more land area occupied On the other hand, since tobacco agronomic traits such as tobacco plant growth vigor, plant height, leaf number, and pitch belong to quantitative trait inheritance controlled by multiple genes, the selection efficiency is bound to be low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1: Breeding of new flue-cured tobacco line HB1604

[0034] 1. Formulate breeding goals:

[0035] Aiming at the ecological and production conditions in the Hubei tobacco area, focusing on overcoming the susceptible TMV of K326 used in the production of flue-cured tobacco, we selected varieties with good quality, resistance to black shank, bacterial wilt and common mosaic virus (TMV), economic traits and It has good yield stability and is a new variety of flue-cured tobacco suitable for large-scale planting in Hubei tobacco-growing areas.

[0036] 2. Select parent:

[0037] According to the breeding goal, the following two parents were selected to participate in the hybridization, and their characteristics are as follows:

[0038] High-quality parent K326: introduced from the American high-quality variety, this variety has good quality, cylindrical plant, topping plant height 99.7cm, effective leaves 23 pieces, pitch 4.3cm, stem circumference 8cm, waist leaves...

Embodiment 2

[0056] Example 2 Breeding of new flue-cured tobacco line HB1618

[0057] 1. Formulate breeding goals:

[0058] Aiming at the ecological and production conditions in the tobacco-growing areas of Hubei, focusing on overcoming the susceptibility to bacterial wilt and TMV of Yunyan 87 used in flue-cured tobacco production, we selected varieties with good quality and resistance to black shank, bacterial wilt and common mosaic virus (TMV) ), good economic traits and stable yield, suitable for large-scale planting of new flue-cured tobacco varieties in Hubei tobacco-growing areas.

[0059] 2. Select parent:

[0060] According to the breeding objectives, the following three parents were selected to participate in the hybridization, and their characteristics are as follows:

[0061] High-quality parent Coker371Gold: imported from the American high-quality variety, this variety is of good quality, with a tower-shaped plant, a topping height of 101.7cm, 17 effective leaves, a pitch o...

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PUM

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Abstract

The invention relates to a cascaded selection method suitable for novel tobacco strain breeding. The method comprises the step of carrying out cascaded selection successively on hybrid progeny materials by combining the expression characteristics of various hybrid generations of the hybrid progeny materials according to characters of four cascades: the first cascaded target character: disease-resistant character, the second cascaded target character: tobacco plant growth and shape character, the third cascaded target character: stress resistant, insect-resistant, fertilizer-resistant and economic characters and the four cascaded target character: high quality, wide applicability and high stability. The workload of breeding staff can be alleviated greatly, so that material resources and financial resources are saved, and the selecting efficiency and the breeding efficiency of crossbreeding generations of tobacco are improved obviously.

Description

technical field [0001] The invention belongs to the technical field of tobacco breeding, and in particular relates to a cascade selection method suitable for breeding new tobacco strains. Background technique [0002] Tobacco, as the main raw material of cigarettes, is an important economic crop in China, and tobacco varieties are the basis of tobacco leaf production. Therefore, cultivating new tobacco varieties is of great significance to tobacco leaf production. At present, the overall goal of cultivating new tobacco varieties can be summarized as "high quality, multi-resistance, suitable yield, high efficiency, and wide application", each of which corresponds to many specific traits, involving resistance to different tobacco diseases and insect pests, tobacco Plant growth traits, tobacco plant morphological traits, economic traits, appearance quality, chemical composition, physical characteristics, sensory evaluation smoking quality, industrial usability of cigarettes, st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04
CPCA01H1/02A01H1/04
Inventor 曹景林程君奇李亚培吴成林张俊杰
Owner HUBEI TOBACCO SCI RES INST