CN103535273A - Breeding method for new triploid sorghum hybrid products - Google Patents

Abstract

The invention discloses a breeding method for new triploid sorghum hybrid products. Chromosomes of colchicines of a sudangrass strain are doubled to be a tetraploid, and then tetraploid sudangrass is hybridized with diploid sorghum to obtain seeds of triploid sorghum hybrids. The new triploid sorghum hybrid product bred by the doubling method is high in forage grass yield.

Description

The breeding method of the high red careless new varieties of a kind of triploid

Technical field

A breeding method for the high red careless new varieties of triploid, relates to the selection of high red careless new varieties, says more specifically a kind of method of cultivating high red careless triploid new varieties.

Background technology

Gao Dancao is that Sudan grass and Chinese sorghum carry out a kind of novel forage grass that distant hybridization is cultivated.Its significant heterosis, hybrid vigor and quality-improving effect have been subject to approval widely, in the livestock-raising of plant-eating animal, are widely used.The aquatic foods grass output that further improves Gao Dancao is the direction that high red careless breeding work is made great efforts.Utilize the method for ploidy breeding to carry out chromosomal doubling to Gao Dancao, according to the rule of plant ploidy breeding, can produce following effect: the one, the huge property of plant organ, after chromosome doubling, the blade of Gao Dancao can broaden, stem stalk can increase in chap, and biological yield is corresponding to be improved, and forage yield increases; The 2nd, extend breeding time, and this is also conducive to the increase of output.

Summary of the invention

Object of the present invention is for the present situation of current Pacetter varieties, proposes a kind ofly by the method for ploidy breeding, cultivates the high red careless new varieties of triploid that output is higher.

The present invention realizes in the following way:

A breeding method for the high red careless new varieties of triploid, comprises the following steps:

(1) cultivate tetraploid Sudan grass strain

1. with the colchicine of 0.001-0.1 concentration, male parent Sudan grass seed is soaked to 10hr;

2. seed is layered on to vernalization in the culture dish that is lined with filter paper;

3. adopt the method for root tip cell chromosome microscopy to select tetraploid individual plant to breed, obtain tetraploid Sudan grass strain.

(2) hybrid seeding

1. take dliploid Chinese sorghum sterile line as maternal, the tetraploid Sudan grass product that obtain with step (1) are that male parent is hybridized, and obtain the high red grass crossing kind of triploid.

Beneficial effect of the present invention: the method by crop breeding is carried out chromosome doubling transformation to Gao Dancao, obtain the red careless new varieties of height that forage yield is higher, can, not increasing under the prerequisite of means of production input, increase the output of sugar of high red careless unit are, less investment, high efficiency.

Embodiment:

A breeding method for the high red careless new varieties of triploid, comprises the following steps:

(1) cultivate tetraploid Sudan grass strain

1. with the colchicine of 0.001-0.1 concentration, Sudan grass seed is soaked to 10hr, its chromosome is doubled to process;

2. seed is layered on to vernalization in the culture dish that is lined with filter paper;

3. adopt the method for root tip cell chromosome microscopy to select tetraploid individual plant to breed, obtain tetraploid Sudan grass strain.

(2) hybrid seeding

1. take dliploid Chinese sorghum sterile line as maternal, the tetraploid Sudan grass product that obtain with step (1) are that male parent is hybridized, and obtain the high red grass crossing kind of triploid.

Claims (1)

1. a breeding method for the high red careless new varieties of triploid, is characterized in that, described breeding method comprises the following steps:

(1) cultivate tetraploid Sudan grass new lines:

1. with the colchicine of 0.001-0.1 concentration, Sudan grass seed is soaked to 5-20hr;

2. seed is layered on to vernalization in the culture dish that is lined with filter paper;

3. adopt the method for root tip cell chromosome microscopy to select tetraploid seedling to breed, obtain tetraploid Sudan grass strain;

(2) hybrid seeding:

1. take dliploid Chinese sorghum sterile line as maternal, the tetraploid Sudan grass product that obtain with step (1) are that male parent is hybridized, and obtain the high red grass crossing kind of triploid.