Method for efficient seed production and pollination of hybrid cotton

Abstract

The invention discloses an efficient pollination method for hybrid cotton seed production, which is characterized in that a female parent is sown in advance in the first ten days of April, seed production can be carried out by adopting a film mulching direct seeding or seedling transplantation mode, a male parent is sown 5-7 days earlier than the female parent, and the planting ratio of the male parent to the female parent is 1: 3-1: 5; the method comprises the following steps: after entering a flowering period, picking flower buds which are about to bloom in the next day at 4-5 p.m. one day before pollination, removing 1 / 3-1 / 2 parts of the lower parts of green bracts, throwing away petals and sepals, picking out styles and anther, putting on moisture-proof paper (clean newspaper or clean newspaper), and putting the moisture-proof paper in a ventilated place; on the next day, putting the styles and the anther into a fine mesh sieve, screening pollen, and putting the pollen into a pollen bottle; the pollen bottle is made of glass, the upper end of the pollen bottle is provided with a rubber plug, and the diameter of a plug opening is about 5mm to facilitate penetration of a stigma; storing the pollen in a glass bottle; a small bottle is taken for pollination, pollination can be carried out at 6-10 o'clock in the morning, the working time can be prolonged in the full-bloom stage, and high-temperature weather can also be avoided; the problems of pollen viability weakening, low hybridization boll formation rate and the like caused by high temperature are reduced, and the seed production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of agriculture, and relates to a high-efficiency pollination method for hybrid cotton seed production. Background technique [0002] Hybrid cotton refers to cotton seeds produced by hybridization, and sometimes cotton grown from hybrid seeds. Hybrid cotton makes full use of the heterosis of cotton, greatly improves fiber quality, improves fiber quality and enhances the ability to resist pests and diseases, so that cotton hybrids quickly occupy more than 80% of the cotton area in the entire Yangtze River Basin, the Yellow River Basin cotton area and Xinjiang cotton area. Rapid development has brought cotton production to a new level. Hybrid breeding generally uses conventional cotton as parents to select hybrids and use cotton sterile lines and restorer lines as parents to select hybrids. These two methods have their own advantages and disadvantages: using conventional cotton parents to select hybrids, paren...

AI Technical Summary

Problems solved by technology

[0003] To solve the problems in the existing hybrid cotton seed production process, this application proposes a method for efficient hybrid cotton seed production and pollination