CN1103542A - Breeding method of high-yield variety of cotton with several bolls in one node - Google Patents

Abstract

The present invention relates to crop breeding method including cross breeding, radioactive breeding, chemical mutation breeding and natural-mutation breeding by which is bred the new variety of cotton having several bolls in each node, boll branch length of 30-50 cm and zero-type branchs. After several-generation directional breeding, the plants with stable property are propagated in large area and can result in a yield increase of 50% over the available varieties.

Description

Breeding method of high-yield variety of cotton with several bolls in one node

The invention belongs to the crop breeding field.

The fruit skill of cotton belongs to the growth of sympodium formula, and each fruit branch has a plurality of joints.Each joint on the present applied cotton variety fruit branch only produces a peach, and still has 50% flower, flower bud, young bell to come off under best cultivation condition, so the gined cotton per mu yield of cotton improves per mu yield by the cultivation approach and is difficult to generally at 75-100 kilograms.

Purpose of the present invention is exactly to belong to a joint one peach, deficiency that output is not high at the cotton variety of using on the present agricultural, and provide a kind of breeding method of high-yield variety of seed selection cotton with several bolls in one node, the new varieties cotton boll quantity of being cultivated greatly increases, although still have 50% come off, also more than existing kind, output also is much higher than existing cotton variety to its cotton boll quantity.

Technical scheme of the present invention is to utilize breeding by crossing, radiation breeding method, chemical mutation method or natural induced mutation breeding method to produce the cotton plant of cotton fruit branch one several bolls in one node.This cotton plant has the peach more than 2-3 on each joint of cotton fruit branch, then with the cotton plant of a this several bolls in one node through successive dynasties directive breeding, stable until proterties, therefrom the seed selection fruit branch length is that 30-50cm and the cotton plant with zero formula fruit branch carry out the large tracts of land breeding then.

Embodiment one

Adopt the nature induced mutation breeding method, the several bolls in one node nature mutagenic fungi that the cotton field occurs is selected, through directive breeding, each year is therefrom selected the cotton plant of 2-3 peaches of a joint, till the stable performance of a several bolls in one node, therefrom selecting fruit branch length again is 30-50cm and the good cotton plant of various economic characters with zero formula fruit branch, can become a several bolls in one node high-yield variety through the large tracts of land breeding.This kind will prevent cotton boll because of coming off that arid, fertilizer deficiency, insect pest etc. cause as far as possible on culture technique, balance fertilizing is a principle not cause down shape and fertilizer damage on fertilizing amount.Every mu of planting density should be 3000-4000 strains.Because this kind fruit branch length can only be grown to 30-50cm, therefore can not cause cotton field the moon to cover, cause flower bud, bell to come off, Dan Taochong and cotton fiber quality can not descend.

Claims (1)

1, high-yield variety of cotton with several bolls in one node breeding method, it is characterized in that utilizing breeding by crossing, radiation breeding method, chemical mutation method or natural induced mutation breeding method to produce the cotton plant of cotton fruit branch one joint 2-3 peach, with the cotton plant of a this several bolls in one node through successive dynasties directive breeding, proterties until a joint 2-3 peach is stable, and therefrom the seed selection fruit branch length is that 30-50cm and the cotton plant with zero formula fruit branch carry out the large tracts of land breeding then.