Sweet potato germplasm resource preservation method

Abstract

A sweet potato germplasm resource preservation method comprises the following steps: S1, carrying out field seedling raising on germplasm resource potato blocks needing to be preserved, and cutting top-section seedlings or second-section seedlings with the seedling length being 25-30 cm and the section number being 5-7 to obtain seedlings; S2, potting and storing the seedlings in a greenhouse by taking three seedlings as one germplasm, pruning the seedlings from time to time in the storage process, and keeping the height of the seedlings to be 30-40 cm; S3, selecting 1 / 3 of the potted seedlings in the S2 every year for potato block propagation, and continuously performing seedling preservation on the rest germplasm; and S4, selecting sweet potato blocks from the sweet potatoes harvested in the S3 for field seedling culture, wherein the obtained seedlings are used for updating the resources corresponding to the S3 in the greenhouse. According to the sweet potato germplasm resource preservation method, greenhouse germplasm preservation is taken as a main part, indoor potato block preservation and field germplasm preservation are taken as auxiliary parts, germplasm is obtained through potato seed breeding, greenhouse old vine renewal and seed nature maintenance are facilitated, the seed nature can be maintained, the field workload can be reduced, operation is easy, the cost is reduced, and the loss of resources can be effectively prevented.

Description

【Technical field】 [0001] The invention relates to a preservation method, in particular to a preservation method of sweet potato germplasm resources. 【Background technique】 [0002] Like other crops, sweet potato germplasm resources are the basis of sweet potato breeding. Sweet potatoes are native to Peru, Ecuador, and Mexico in South America. After Columbus discovered the New World, they were brought back to the Old World and widely used and promoted. Rich germplasm resources have been formed during the long-term natural variation and human production activities. [0003] All countries in the world attach great importance to the collection, preservation, identification and utilization of germplasm resources. [0004] In Japan, as of 1987, 3,195 germplasm resources of sweet potato had been collected and preserved and utilized, and the "Nanfeng" variety and many excellent lines had been bred, most of which were resistant to nematode disease and increased starch content, openi...

AI Technical Summary

Problems solved by technology

This traditional preservation method not only requires a lot of work, but also requires two field preservations and one indoor preservation every year to complete the one-year preservation. It is often affected by unfavorable factors in a certain preservation link. Seeds are rotten due to diseases, and field planting is often affected by bad weather or rodents, resulting in loss of harvest, etc., resulting in loss of resources and no guarantee of safety.

The more advanced preservation method is the preservation of test tube seedlings, but advanced equipment and high funds are required, and the preservation of sweet potato germplasm resources in Guangxi lacks special funds, so a safe, efficient and low-cost preservation method of sweet potato germplasm resources is urgently needed

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