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Artificial-bursting cross pollination method for cassava

A cross-pollination and artificial technology, applied in the field of plant hybridization, can solve the problems of difficult control of flowering period, low probability of pollination success, easy to be affected by weather, etc., and achieve the effect of improving cassava seed setting rate, breeding efficiency, and cassava fruiting rate

Inactive Publication Date: 2013-12-25
SOUTH ASIAN TROPICAL AGRI SCI RES INST OF GUANGXI
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is exactly to provide a kind of cassava artificial bud-broken hybrid pollination method for conventional cassava artificial pollination existing in the prior art that flowering period is difficult to control, is easily affected by weather, and pollination success probability is low, can effectively control the maximum of artificial pollination The best time, less affected by weather changes, improve cassava fruiting rate

Method used

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Effect test

Embodiment 1

[0018] 1. Select hybrid parents

[0019] Introduce or collect local varieties, understand the characteristics of each variety, predict the flowering period, and pre-select hybrid parents. Choose varieties with many advantages, few disadvantages, and complementary advantages and disadvantages as parents. The cultivars with high yield, high harvest index and high starch content were selected as the female parent. The premise of choosing a good hybrid parent can carry out hybridization between varieties.

[0020] The parents for the test are: the male parent is Huanan 205; the female parent is Huanan 5.

[0021] 2. Select the planting area

[0022] Cassava is a tropical and subtropical crop, and the seed production site must choose a dry slope with long sunshine and a barren land. After the cassava is planted, no fertilizer is applied for a lifetime, and the growth of cassava is artificially controlled to promote cassava branching and flowering. Hybridization can only be don...

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Abstract

The invention belongs to the technical field of cassava intervarietal hybridization breeding and provides an artificial-bursting cross pollination method for cassava. 2-3 days before flowering of cassava female flowers, the female flowers are subject to artificial bursting, so that female flower stigmas are exposed; then the male flower pollen or the bud of a newly-flowered male flower, prepared in advance, is aligned to the female flower stigmas to sweep back and forth, so that the stigmas are stained with the pollen; the pollinated cassava female flowers are covered by a bag; 3-4 days after pollination, the bag is removed. The condition of mucus (nectar) secreted on the female flower stigmas is utilized as an artificial pollination medium to judge the best pollination time, so that the female flowers and the male flowers have enough time for pollination and impregnation, and the cassava fruitage ratio is improved. The artificial-bursting cross pollination method can be used for intervarietal hybridization of cassava and lays foundations for cultivating new cassava varieties.

Description

technical field [0001] The invention relates to plant hybridization technology, in particular to cassava hybridization and pollination technology. Background technique [0002] Cassava is a cross-pollinated crop, and the male and female flowers are in the same sequence. The female flowers bloom first, and the male flowers bloom later. The interval is about 7 days. It is difficult for flowers of the same sequence to self-fertilize, but different inflorescences or the same plant will self-fertilize. The cassava artificial cross-pollination method currently used is to isolate the inflorescence of the selected male flower by bagging, collect the pollen in a desiccator with silica gel and place it for a few days, and carry out artificial pollination on the day when the female flower opens; In the afternoon, after the male and female flowers bloom, select the inflorescences that bloom on the 2nd day, cover them with a ventilated bag or a transparent paper bag, and allow the male a...

Claims

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Application Information

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IPC IPC(8): A01H1/02
Inventor 李恒锐刘连军邱文武马文清彭崇施丁寿朱荣王文林
Owner SOUTH ASIAN TROPICAL AGRI SCI RES INST OF GUANGXI
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