A method for germplasm preservation and purification and rejuvenation of Nanhu water chestnut

Abstract

The invention discloses a method for germplasm preservation and purification and rejuvenation of Nanhu water chestnut, belonging to the technical field of germplasm preservation. The method includes: (1) constructing germplasm preservation pools, identification pools, rejuvenation pools and cultivated species growth pools; (2) collecting mature water chestnuts with characteristics of Nanhu water chestnut varieties; (3) collecting and preserving water chestnut seeds for Germination of seedlings, transplanting to the germplasm identification pool, cultivating, and screening of water chestnut species that meet the appearance characteristics of Nanhu water chestnut; (4) Rejuvenation of Nanhu water chestnut; (5) Purifying and rejuvenating original seedlings, transplanting to cultivated species for growth Pond, cultivate, screen and reserve seeds as purified and rejuvenated cultivars. The invention provides a method for germplasm preservation and purification and rejuvenation of Nanhu water chestnut, which regulates the collection, identification and seed retention methods of Nanhu water chestnut resources, and can effectively preserve the original species of Nanhu water chestnut; through the cultivation of cultivated species Production can effectively guarantee the purity of the species used for Nanhu water chestnut production.

Description

technical field [0001] The invention relates to the technical field of germplasm preservation, in particular to a method for germplasm preservation and purification and rejuvenation of Nanhu water chestnut. Background technique [0002] Nanhu water chestnut is a hornless water chestnut, also known as wonton water chestnut, round water chestnut, and monk water chestnut. It is named after its main production areas in Jiaxing Nanhu and surrounding waters in history. Its skin is emerald green and its ends are round. The meat is tender, juicy, sweet, crisp, and fragrant, and it is better than other varieties. It is often used as a fresh specialty fruit and is a treasure in Lingzhong. [0003] Nanhu water chestnut has a long history of cultivation in Jiaxing. According to records, the hornless carbonized water chestnut unearthed from the Majiabang cultural site in Jiaxing has a history of more than 6,000 years. As a native specialty of Jiaxing, Nanhu water chestnut has a strong c...

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Problems solved by technology

However, after the cultivation of water chestnut, farmers did not deal with the remains of water chestnut plants in time, and allowed the plant waste to rot freely on the river course, which had a great impact on water quality in a certain period of time. Restricted, resulting in the continuous reduction of Nanhu water chestnut planting area

[0005] With the decline of the planting area of ​​Nanhu water chestnut and the departure of some traditional growers, the preservation of the germplasm of Nanhu water chestnut has not been carried out well. The Nanhu water chestnut purchased on the market has long horns and other phenomena. risk of further loss

[0006] In addition, the limited cultivation of Waihenanhu water chestnut and the poor commerciality of Nanhu water chestnut and the poorer planting efficiency than other water chestnut varieties after cultivation in Nanhu water chestnut, led some farmers to prefer to plant red water chestnut, two-cornered green water chestnut and other varieties. With the planting of other water chestnut varieties, Nanhu water chestnut germplasm is affected by its biological characteristics, and different varieties cannot be well isolated, resulting in Nanhu water chestnut germplasm resources being polluted by other varieties of pollen, resulting in variety degradation

However, farmers are unable to purify and rejuvenate Nanhu water chestnut varieties during the cultivation process, which ultimately makes it difficult to buy pure Nanhu water chestnut products in the current market.

[0007] To sum up, Nanhu water chestnut, as the city card of Jiaxing City and the characteristic agricultural products beside the Nanhu Red Boat, has the risk of no land to grow and loss of germplasm resources

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