Efficient construction method of cassava inbred line group material

Abstract

The invention discloses an efficient construction method of cassava inbred line group material. The method includes the following steps: selecting land, leveling land and applying a base fertilizer, sowing, promoting flower and preserving flower, pollinating, preserving fruit and harvesting seeds. According to the method, a potassium sulfate compound fertilizer, a calcium magnesium phosphate fertilizer and an organic fertilizer are mixed and fertilized with appropriate proportion of each element of the fertilizer, so that the growth requirement of cassava plants is met; a flower-accelerating fertilizer, a flower-preserving fertilizer and potassium dihydrogen phosphate are sprayed or applied to the roots, so that the cassava flowering is promoted in advance, and the flowering quantity and the single plant fruiting rate are improved; after the cassava fruiting, the fruit-preserving fertilizer is applied for topdressing, so that the fruiting rate and the fruit weight of the cassava fruitsare effectively improved; and the planting time is staggered, so that the meeting probability of male and female cassava flowers is improved, and the pollination rate is improved. The method furtherdischarges the interference of foreign pollen, and the purity is as high as 100%; and the method of fertilization, flower promotion, flower preservation and fruit preservation enables cassava to blossom early, seeds to be harvested early, so that the emergence rate of seeds is improved, and the breeding period is shortened.

Description

technical field [0001] The invention relates to the technical field of crop cultivation, in particular to a method for efficiently constructing cassava inbred line population materials. Background technique [0002] Cassava (Manihot esculenta Crantz) is a cassava plant in the Euphorbiaceae family. It is resistant to drought and poverty. It is widely planted in more than 100 countries or regions in Africa, America and Asia. It is one of the three major potato crops and the third largest grain in tropical regions. Crop, the sixth largest food crop in the world, is known as the "king of starch". Cassava is a treasure all over the body and has a wide range of uses. It can be eaten, fed and processed into various industrial products, such as starch and alcohol. [0003] Cassava is a monoecious plant with different flowers, and cross breeding is an important way for variety selection. The new varieties of cassava selected and bred in my country are mainly obtained through resour...

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Problems solved by technology

[0005] The invention overcomes the problems in the prior art that cassava fruits are difficult to mature normally under the climatic conditions of the south subtropical monsoon region, there are abnormal fruit development or poor quality of seeds, the pollination rate of cassava in tropical regions is low, and the amount of cassava seeds obtained is small, and There are intervals between the flowering time of female flowers and male flowers of the same inflorescence of cassava, the pollination rate of breeding is extremely low, the fruit setting rate is extremely low, and the method of using artificial hybridization to obtain inbred line population materials has technical problems such as high cost and low efficiency, and provides a cassava self-bred Efficient construction method of family group materials

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