Insect-resistant short-season cotton new variety selection breeding method

A technology for short-season cotton and new varieties, which is applied in the fields of botany equipment and methods, applications, plant gene improvement, etc., can solve the problems such as the difficulty in breeding transgenic insect-resistant short-season cotton varieties, and broaden the scope of germplasm resource utilization , the effect of short reproductive period

Inactive Publication Date: 2015-12-09
SHANDONG COTTON RES CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for breeding new varieties of insect-resistant short-season cotton, aiming to solve the problem that it is difficult to breed transgenic insect-resistant short-season cotton varieties in a short period of time by relying on traditional breeding methods

Method used

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  • Insect-resistant short-season cotton new variety selection breeding method
  • Insect-resistant short-season cotton new variety selection breeding method
  • Insect-resistant short-season cotton new variety selection breeding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: Breeding of insect-resistant short-season Mianlu 890

[0022] The non-transgenic short-season cotton Lu 458 line was used as the female parent, and the Bt gene conventional cotton insect-resistant cotton Lu 55 line was used as the male parent; F 1 Rows of plants, mixed harvest; planted F 2 Seed selection, a large number of insect-resistant, early-maturing excellent plants were selected; Linqing summer sowing (May 30) planted F 3 In the seed selection nursery, continue to select early-maturing insect-resistant and high-quality plants from the high-quality lines; summer sow on May 30, and continue to conduct plant-line comparison tests. The 997th line showed early maturity, super early pro-Lu 458 lines, high yield, and excellent comprehensive traits , high-pitched cotton bollworm, but there are still some differences among individual plants, so it is used as the key material, and a large number of early-maturing insect-resistant and excellent plants are select...

Embodiment 2

[0023] Example 2: Breeding of insect-resistant short-season cotton N881

[0024] The non-transgenic short-season cotton Lu 4404 line was used as the female parent, and the Bt gene conventional cotton insect-resistant cotton Lu 55 line was used as the male parent; F 1 Rows of plants, mixed harvest; planted F 2 In the seed selection nursery, a large number of insect-resistant and early-maturing excellent plants were selected; Linqing summer sowing (May 30) planted F 3In the seed selection nursery, continue to select early-maturing insect-resistant and superior plants from the superior plant rows; summer sow on May 30, continue to conduct plant-row comparison experiments, plant in Hainan in winter and add generations, and the N881 row shows early maturity, super early pro-Lu 4404 line, high-yield Good, excellent comprehensive traits, high resistance to cotton bollworm, compared strains for two consecutive years, all of which are outstanding. At the same time, continue to select...

Embodiment 3

[0025] Example 3: Breeding of insect-resistant short-season Mianlu 54.

[0026] The new short-season cotton line Lu 458 was used as the female parent and the Lu 1367 line was used as the male parent. It was bred by alternate planting in spring and summer and continuous multi-generation pedigree selection. The source of the female parent Lu 458 is as mentioned above; the male parent Lu 1357 is the selected line of Lumianyan No. 19. The full growth period is 111 days, which is 1.5 days shorter than the control Lumianyan No. 19; in the production test in 2011, the full growth period is 106 days, which is 2 days shorter than the control Lumianyan No. 19. The weight of a single boll is 6.0 grams, the skin percentage is 42.5%, the seed finger is 9.6 grams, and the flowering rate before frost is 94.9%. The average yields of seed cotton, pre-frost seed cotton, lint, and pre-frost lint were 3100.5 hm -2 、2938.5 hm -2 、1320·hm -2 、1252.5·hm -2 , respectively increased by 13.0%, 16....

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Abstract

The invention discloses an insect-resistant short-season cotton new variety selection breeding method comprising following steps: 1) hybridizing a transgenic Bt cotton regular insect-resistant cotton inbred line Lu-55 with a short-season cotton line Lu-458 as parents; 2) planting an F1 generation in Hainan Province in winter, mixed-harvesting the F1 generation, spring-sowing an F2 separated generation in mainland at about 20th, April, selecting early-maturing and insect-resistant superior plants according to breeding objects, and summer-sowing an F3 generation in mainland at about 30th, May; 3) continuously selecting early-maturing and insect-resistant superior plants from superior plant rows, performing inspection of various growth periods and agricultural characters; 4) continuously performing plant row comparison and identification to F4-F5 generations and an F6 generation, selecting early-maturing and insect-resistant superior plants from the superior plant rows until the characters are stable; 5) testing the quality of fibers through primary selection in field, cotton harvesting and yield calculation and inner seed inspection; and 6) finally selecting a superior plant row, and raising the superior plant row to the next level new strain and performing multipoint comparison identification test. The selection breeding method broadens utilization range of germplasm resources of short-season cotton, overcomes a negative relationship of early maturity to yield and quality characters, and can be used for selecting new varieties, which are shorter in growth period, are insect-resistant, are high in yield and are high in quality, of the short-season cotton.

Description

technical field [0001] The invention belongs to the technical field of cotton breeding, in particular to a method for breeding new insect-resistant short-season cotton varieties. Background technique [0002] As an important strategic material of our country, cotton occupies a very important position and role in our national economy. my country has a large population and little land. Ensuring the food security of more than 1.3 billion people is the top priority, and the contradiction between grain and cotton is prominent. On the other hand, cotton has a long growth period and requires a lot of labor in production management. Benefits are reduced. How to use the existing land resources to achieve a double harvest of grain and cotton and increase the income of cotton planting has become an important issue that needs to be solved urgently. Shortening the growth period of cotton, cultivating early-maturing cotton varieties, and realizing the intercropping (rotation) of cotton a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04
Inventor 李汝忠王宗文孔凡金王景会申贵芳韩宗福
Owner SHANDONG COTTON RES CENT
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