A kind of parental planting method to increase the yield of hybrid soybean seed production

Abstract

The invention relates to a male and female parent planting method for increasing yield of hybrid soybean seeds. The male and female parent planting method is characterized by including steps that a double-row male and female parent planting mode on partition ridges as the male and female parent ratio of 1:2 is adopted, the male and female parents have agricultural characteristics with significant differences and planted in two rows on the ridges with the row distance of 15cm, the row distance between female parents is 60cm, on-ridge double-row male and female parent density is 60,000 to 120,000 pants / hectare, and single-row female parent density is 150,000 to 250,000 plants / hectare; a narrow-row close-planting mode can be also adopted; the row distance between the male parents and the female parents is 30-45cm, the row distance between the female parents is 45-60cm, and density of the male and female parents is 100,000 to 250,000 plants / hectare. By spatial arrangement optimization of the male and female parents, wild insect pollination can be more adapted, planting ratio of the male parents is decreased, and yield of hybrid soybean seeds can be remarkably increased.

Description

technical field [0001] The invention relates to a parental planting method for increasing the yield of hybrid soybean seed production, and belongs to the field of soybean hybrid seed production. Background technique [0002] Using soybean heterosis to greatly increase soybean yield is considered to be one of the most promising ways. Soybean heterosis can increase yield by more than 20%. However, for the successful application of soybean hybrids in production, the following four conditions must be met: there is a reliable way to avoid selfing of the female parent; the hybrids have a strong dominance; there is an appropriate pollinator; and the seed price is acceptable to both farmers and seed companies . [0003] The Jilin Provincial Academy of Agricultural Sciences bred the world's first soybean cytoplasmic male sterile line and maintainer line in 1993, and realized the "three-line" matching of cultivated soybean in 1995, making it possible to utilize soybean heterosis. Th...

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Problems solved by technology

However, research on the optimal distance between parents has not been carried out, because insects will collect pollen in the most effective way between flowers, therefore, under the condition that the ratio of parents to parents is 1:2, the spatial distance of parents and male parent The land area occupied will directly affect the yield of seed production

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