CN103202181A - Sweet potato cross-breeding method - Google Patents

Abstract

A sweet potato cross-breeding method comprises the following steps of: in June, remaining two stem branches at the lower part among the stem branches of morning glory, and shearing off the others; cutting off sweet potato buds for grafting; binding by using the leaves of morning glory; watering and draining after survival; inserting a rod so that the morning glory climbs up on the rod and blooms; artificially pollinating the grafted flowers with the sweet potato flowers mutually to fruit; sowing seeds and selecting and beeding good seeds, and sowing the seeds at an interval of 6cm so that seedlings can be transplanted conveniently; after the seeds in the seedbed sprout, transplanting seedlings; after the sweet potatoes are mature, digging the sweet potatoes out; selecting the sweet potatoes with tuberous roots and abandoning those without the tuberous root; breeding the selected tuberous roots next year, selecting good-quality products and abandoning bad ones, and repeating the steps in continuous three years to obtain the good-quality variety. The sweet potato cross-breeding method has the advantages that the grafting process is simple, the cross-bred good-quality varieties are numerous, 8000 varieties (strains) are bred, one hundred of the 8000 varieties are new varieties, and 6 new varieties having unique features are selected out.

Description

A kind of sweet potato hybridization breeding method

Technical field

The present invention relates to revolve section's class plant hybridization technical field, be specifically related to a kind of sweet potato hybridization breeding method.

Background technology

Existing cassava and Ipomoea batatas graft hybridization technology are open already, but cassava and Ipomoea batatas grafting program complexity, the fine quality that hybridization is cultivated is few.

Summary of the invention

In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of sweet potato hybridization breeding method, the grafting program is simple, and the fine quality that hybridization is cultivated is many.

In order to achieve the above object, the technical scheme taked of the present invention is:

A kind of sweet potato hybridization breeding method may further comprise the steps:

The first step, keep bottom two stem branches June in the stem branch of leading a cow, and all the other are wiped out;

In second step, cut the grafting of Ipomoea batatas bud: long from 10 centimeters of Ipomoea batatas bud clips, carry out grafting again;

In the 3rd step, leaf is wrapped up with leading a cow: utilize leading a cow of grafting neighbours to wrap up 10 centimeters long Ipomoea batatas bud;

In the 4th step, water behind the grafting survival, drain flooded fields: keep 80 percent water on the ground, many just water drainages;

In the 5th step, inserted link holds up its climbing to bloom;

In the 6th step, grafting flower and the artificial pollination mutually of Ipomoea batatas, knot are planted;

In the 7th step, under the seed kind, breeding variety is answered one of 6 centimeter square kind, transplants so that seedling goes out the back;

The 8th step, behind the seed bed seed sprouting, seedling is transplanted, after the maturation, the excavation Ipomoea batatas has piece root person to select for use, no piece root person remove need not, the next year piece root propagation chosen of usefulness is again selected and is excellently eliminated badly, 3 years like this, can select fine quality.

Advantage of the present invention: the grafting program is simple, and the fine quality that hybridization is cultivated is many, cultivates kind (strain) 8000, and more than 100 of newtype kinds have been selected 6 of some characteristic new varieties.

Embodiment

Be described in detail below in conjunction with the present invention of embodiment.

A kind of sweet potato hybridization breeding method may further comprise the steps:

The first step, keep bottom two stem branches June in the stem branch of leading a cow, and all the other are wiped out;

In second step, cut the grafting of Ipomoea batatas bud: long from 10 centimeters of Ipomoea batatas bud clips, carry out grafting again;

In the 3rd step, leaf is wrapped up with leading a cow: utilize leading a cow of grafting neighbours to wrap up 10 centimeters long Ipomoea batatas bud;

The 4th step, untie the wrapping blade after treating to survive in 11,12 days, water, drain flooded fields; Keep 80 percent water on the ground, many just water drainages;

In the 5th step, inserted link holds up its climbing to bloom;

In the 6th step, grafting flower and the artificial pollination mutually of Ipomoea batatas, knot are planted;

In the 7th step, under the seed kind, breeding variety is answered one of 6 centimeter square kind, transplants so that seedling goes out the back;

The 8th step, behind the seed bed seed sprouting, seedling is transplanted, after the maturation, the excavation Ipomoea batatas has piece root person to select for use, no piece root person remove need not, the next year piece root propagation chosen of usefulness is again selected and is excellently eliminated badly, 3 years like this, can select fine quality.

Claims (1)

1. a sweet potato hybridization breeding method is characterized in that, may further comprise the steps:

The first step, keep bottom two stem branches June in the stem branch of leading a cow, and all the other are wiped out;

In second step, cut the grafting of Ipomoea batatas bud: long from 10 centimeters of Ipomoea batatas bud clips, carry out grafting again;

In the 3rd step, leaf is wrapped up with leading a cow: utilize leading a cow of grafting neighbours to wrap up 10 centimeters long Ipomoea batatas bud;

In the 4th step, water behind the grafting survival, drain flooded fields: keep 80 percent water on the ground, many just water drainages;

In the 5th step, inserted link holds up its climbing to bloom;

In the 6th step, grafting flower and the artificial pollination mutually of Ipomoea batatas, knot are planted;

In the 7th step, under the seed kind, breeding variety is answered one of 6 centimeter square kind, transplants so that seedling goes out the back;

The 8th step, behind the seed bed seed sprouting, seedling is transplanted, after the maturation, the excavation Ipomoea batatas has piece root person to select for use, no piece root person remove need not, the next year piece root propagation chosen of usefulness is again selected and is excellently eliminated badly, 3 years like this, can select fine quality.