Breeding method for triploid cassava

A technology of triploid and cassava is applied in the field of selection and breeding of triploid crop varieties to achieve the effects of easy operation, improved breeding efficiency and high success rate

Inactive Publication Date: 2011-11-16
GUANGXI SUBTROPICAL CROPS RES INST GUANGXI SUBTROPICAL AGRI PROD PROCESSING RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few reports on the selection and breeding of cassava triploid varieties in my country.

Method used

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  • Breeding method for triploid cassava

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Experimental program
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Effect test

Embodiment 1

[0015] Selected cassava varieties GR891 and Huanan 124 were planted in March 2004 or the branches of the previous year’s cassava were cut off. When the cassava growth height or branch length reached 40-50 cm, the top was removed. Take off the top for about a week, wrap the axillary bud growth point with cotton, and drop 3-4 drops of colchicum solution with a weight concentration of 0.4% on the cotton with a dropper at 8-11 a.m. every day. After 3-4 days, stop dripping the medicine, observe the leaves, and cut off the stems at the upper part of the leaves with large variation points, thickening and curling, so that the axillary buds can germinate again. After 2-3 times of cutting and separation, GR891, and South China All the leaves of 124 become thicker, shorter, and darker branches, then carry out cutting propagation of young branches or green branches, carry out ploidy identification of chromosomes, and cultivate completely mutated tetraploid GR891-4X and Huanan 124-4X strain...

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Abstract

The invention discloses a breeding method for triploid cassava. The triploid cassava is bred through the following steps: inducing diploid cassava with chemical medicines so as to double cell chromosomes, manually cutting and separating branches of the induced diploid cassava a plurality of times so as to breed branches of totally mutated tetraploid cassava, carrying out softwood or greenwood cutting propagation on the branches so as to breed tetraploid lines, and hybridizing the tetraploid lines with diploid cassava so as to breed triploid cassava. The advantages of the invention are as follows: colchicine is utilized in the invention to induce chromosome double of cassava and goal-directed breeding is carried out; the breeding method has the characteristics of a simple process, easy operation, a high success rate, short time and greatly improved efficiency in breeding new species of cassava.

Description

technical field [0001] The invention relates to a breeding method for triploid crop varieties, especially a breeding method for triploid cassava varieties. Background technique [0002] The traditional cassava breeding technology is to hybridize through cassava flowering, and then go through planting comparison tests such as seed seed single plant evaluation-single row evaluation-primary line comparison-advanced line comparison-regional line comparison-production test, etc. Screen out new varieties. Since cassava is a highly heterozygous crop, this heterozygosity causes the F1 generation to segregate strongly, and it is difficult to grasp the direction of its variation. Using traditional breeding methods to carry out variety selection has long breeding cycle, low efficiency, and poor predictability; while using chemical liquid induction, the plant chromosomes are doubled to become autotetraploid plants, and then compared with diploid (currently cultivated) The cassava vari...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/08A01H1/02
Inventor 陈显双韦丽君田益农陆祖双李云玲
Owner GUANGXI SUBTROPICAL CROPS RES INST GUANGXI SUBTROPICAL AGRI PROD PROCESSING RES INST
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