A method for improving yield of cucumber hybrid seed production

Abstract

The invention discloses a method for improving the hybrid seed production yield of cucumber. The method comprises the following steps: sowing male parents by 5 days in advance, carrying out topping when the eighth leaf of each male parent emerges, leaving a cucumber located as close as possible to the upper part of each male parent for character identification, thinning all remained cucumbers when female flowers and lateral buds are visible by naked eyes, after character identification of the left cucumber is completed, immediately removing the left cucumber, and allowing plant nutrients to be concentratedly supplied to the male parent for male flower bud differentiation and pollen mother cell development; and starting fixing cucumbers on female parents when each male parent in the whole field blooms three male flowers or above in average every day, and controlling the growth of the female parents by using paclobutrazol at the same time. According to the invention, topping is adopted when the eighth leaf of each male parent emerges, i.e., the part located above eight true leaves of a main stem is removed; and the method provided by the invention has the following advantages: the blossom amount of the male flowers per day is doubled or above; the flowering phase is prolonged by 7 to 10 days; the flower synchronization time of male and female parents is long; pollen development and female parent pollination are sufficient; thus, the hybrid seed production yield is improved.

Description

technical field [0001] The invention relates to the field of plant breeding, in particular to a method for improving the yield of cucumber hybrid seed production. Background technique [0002] At present, in the process of cucumber hybrid seed production, the method of sowing the male parent in advance or increasing the number of rows of the male parent plant is used to increase the number of male flowers, but the male parent plant is large, shields the sun, and competes with the female parent for fertilizer and water. The small number of male flowers opening every day leads to a small amount of pollen, and the female parent's female flowers are poorly pollinated, resulting in low seed production yield. Contents of the invention [0003] In order to solve the above problems, the present invention provides a method for improving the yield of cucumber hybrid seed production, which is to pick off the heart when eight leaves appear in the male parent, that is, to remove the pa...

AI Technical Summary

Problems solved by technology

[0002] At present, in the process of cucumber hybrid seed production, the method of sowing the male parent in advance or increasing the number of rows of the male parent plant is used to increase the number of male flowers, but the male parent plant is large, shields the sun, and competes with the female parent for fertilizer and water. The small number of male flowers opening every day leads to a small amount of pollen, and the pollination of the female parent's female flowers is poor, resulting in low seed production yields