The growing area of ​​zucchini in recent years has brought opportunities for its seed industry. However, because the seed production procedures are not standardized, the same nature in different regions is very different. Therefore, it is necessary to regulate the seed production process for pumpkin. The author believes that the seed quality program control can be divided into: inbred lines, sowing and seedlings, pollination mark, harvest, processing and sales of quality control procedures.

I. Quality control of zucchini inbred lines

Inbred original species must be pollinated by male and female flowers in the inbred plant nursery, and the plants should be selected strictly for 3 times: first, the plants with strong growth and low number of female flowers at the time of colonization should be selected; second, the first one must be removed. Female flowers, leaving more than 2 to 4 female flowers, strictly bagging, pollination with the same plant, to sit after the seed melon, select 1 to a good species of melon seed retention, and the remaining removed; third is the maturity of the seed melon traits typical and healthy The melon seeds were harvested as the original species. The inbreds expand their inbred lines through three ways: first, they are planted in isolated sheds, isolated from bees and other insects, and need not be bagged; artificial sisters are allowed to breed; second, open field cultivation (without consideration of isolation), strict male and female Flower bagging, the sisters do a good job after the signing of the propagation; the third is to expand the distance isolation, in the area around the 1000M above without the cultivation of summer cucurbits, remove the first female flower, let insects pollinated breeding.

Second, sowing and seedling quality control

The selection of seed production bases should select villages with high scientific and technological quality and enthusiasm, land with medium-fertility, convenient irrigation, and relatively cool areas and land plots. Sowing in strict accordance with the proportion of the parents of planting, according to the parents sowing time requirements, timely sowing. The sowing date is generally 30 to 35 days before the local night frost. Seedlings are mixed and mixed at the seedling stage. According to the leaf shape, leaf color, and growth of the inbred line, the first 3 to 4 leaf stages go to miscellaneous, and the 6 to 9 leaf female plants reveal the second time to go to miscellaneous, especially the father has to do To be foolproof.

Third, pollination mark quality control

Before pollination, the shape and color of the melon fetus and the growth of the plant should be mixed again. At the same time, the male flower on the female parent and the female flower on the first female flower and the male parent should all be manually removed to ensure that the female flower of the second to third female flower and The quality of the parent pollen. Pollination and marking The mother's female flower and the male's male flower that are about to open on the second day are all bagged on the afternoon of the previous day. On the morning of the second day, the male flower was collected first. Remove the corolla and use the stamens to gently and evenly apply the pollination on the mother's stigma. Immediate attention should be paid to the fact that the malformed melon is removed in time to facilitate the development of the hybrid melon. Those that have already made hybrids should be removed if they have not been bagged; The hybrid melon bagging is complete, but without marking, it should be a good marker; after the pollination is finished, the paternal plants should be removed.

Fourth, harvest quality control

40 to 50 days after the pollination, fruit coloring and maturation begins; when harvesting, it is important to pay attention to whether the collected fruit has the characteristics of the cultivar, and pay special attention to hybridization markers, where unclear markers and unripe seed melons cannot be harvested. The fullness of the melon seeds collected after ripening is still poor, and they must be cooked in the shade for 10 to 15 days. The 1000-grain weight of ripened seeds can be increased by 10-30G, and the bud rate can be increased to more than 90%. In the after-ripening rot melon appearance color dark brown, crisp and easy to fall off, directly affect the bud rate. When seeds are collected, they should be separated from seeds and pods in time and washed with water.

V. Acquisition and Processing Quality Control

The acquisition was performed with the participation of the person in charge of the seed production base. Each grower was weighed, and 3 samples were sealed. One person in charge of the base stays; the seed acquirer leaves two, one of which is left as a day test, and the other as an original preservation, which can be used as a re-assessment sample when there is a dispute. Field identification The seed samples were serially numbered according to the species, and the germination rate test was conducted first. Then, the germination species were spotted on the production line to obtain purity. Unqualified seeds must not be sold. Seed processing quality Seed processing, the clarity of the seed, fullness and moisture, etc., require a cleanliness of more than 98%, 1000-grain weight 80 ~ 130G, moisture content of 8% or less, before packaging. The quality of packaging and packaging should be standardized and the labeling should be clearly correct. The bag should indicate the variety, name, quantity, production time, production unit, and accurate cultivation instructions.

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