Eustoma grandiflorum seedling raising method capable of eliminating rosette characters through regulation and control of temperature and light

Abstract

The invention discloses a eustoma grandiflorum seedling raising method capable of eliminating rosette characters through regulation and control of temperature and light. The method solves the problemsof eustoma grandiflorum seed dormancy and obstruction on seedling rosettes, field planting and flowering. The method comprises the steps of low-temperature moisturizing pre-culture after sowing, regulation and control of light and temperature during germination acceleration culture and strong seedling culture, low-temperature vernalization treatment on small seedlings before harvesting and illumination regulation and control. According to the method, the average germination rate of seeds reaches 96.4%, the average rosette rate at the seedling stage is 0.8%, and the average rosette rate at theflowering and planting stage is 0.91%. Compared with the prior art, the eustoma grandiflorum seedling raising method has the advantages that the average germination rate of the seeds is increased by9.58%, the average rosette rate at the seedling stage is reduced by 78.1%, and the average rosette rate at the flowering and planting stage is reduced by 88.3%.

Description

technical field [0001] The invention belongs to the technical field of fine seed breeding, and in particular relates to a temperature control method for different stages of eustoma seedling raising. Background technique [0002] Eustoma grandiflorum (Eustoma grandiflorum) is a perennial herb of the Gentianaceae Eustoma genus. Its production volume ranks seventh in the world. It is also the fastest-growing new flower species in China after lilies and roses in recent years. Lisianthus not only has the beauty of roses, but also has unique blue and complex colors, and the vase period is long, so it is called "porcelain rose". However, at present, more than 60% of the seedlings used in domestic flower production are still imported from the Netherlands, and the supply of domestic seedlings is less than 40%, and the rosette rate of domestic seedlings after planting is 5-8%, and even reaches more than 20% in summer. However, basically no rosettes are found in imported seedlings, an...

AI Technical Summary

Problems solved by technology

However, at present, more than 60% of the seedlings used in domestic flower production are still imported from the Netherlands, and the supply of domestic seedlings is less than 40%, and the rosette rate of domestic seedlings after planting is 5-8%, and even reaches more than 20% in summer. However, there are basically no rosettes in imported seedlings, and the proportion of rosettes planted in summer does not exceed 2%.

Therefore, when raising seedlings, it is necessary to break the dormancy of seeds and seedlings through different temperature treatments at different stages, and prevent the induction and occurrence of rosettes in the seedling and growth stages. The research on cycle and so on has not completely broken through, resulting in low seed germination rate, irregular growth and high proportion of "rosette seedlings", especially the problem of rosettes in summer seedling cultivation and cut flower planting is more prominent

"Rosette seedlings" are mainly characterized by shortening of internodes, widening of leaves, slow growth or stagnation. The seedlings with rosettes do not grow like "lotus flowers" when they sit on the ground. Large seedlings in the field show slow growth, delayed flowering, poor flowering or even no flowering. Seriously affect the quality of seedlings and cut flowers

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