Sugarcane cut stem hybridization method for production of hybrid seeds at tropical monsoon climate area

A hybrid seed production, monsoon climate technology, applied in the fields of botanical equipment and methods, plant genetic improvement, horticulture, etc., can solve the problems of difficult control of environmental conditions such as temperature and humidity, influence of seed germination rate, and low utilization rate of ear stems, etc. Achieving the effect of good firm rate, convenient operation and high efficiency

Inactive Publication Date: 2009-04-08
GUANGZHOU SUGARCANE IND RES INST
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  • Summary
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  • Application Information

AI Technical Summary

Problems solved by technology

Since the establishment of the field in 1953, various methods have been used, such as field hybridization, female parent spikes to promote roots and then cut down for planting, and male parent flower spikes for pollination when flowering. Although hybrid seeds can be obtained, they need to be rep

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method suitable for sugarcane hybrid seed production in China's tropical monsoon climate region, the sugarcane parent intercepts the upper half of the panicle stem when it blooms, and moves it to a hybrid greenhouse for isolation and directional hybridization according to the hybrid combination, which is characterized in that it includes the following steps:

[0034] (1) sugarcane parent planting:

[0035] Sugarcane parents are planted in field parent gardens or barrels with irrigation conditions, difficult-to-flower and late-flowering parents are planted in the autumn or early winter of the previous year, and easy-to-flower and early-flowering parents are planted in the spring of the current year.

[0036] (2) Spike root-promoting treatment:

[0037] For the parental line that is planned to be the female parent, the panicle root-promoting treatment is carried out. From the first ten days of October, select the panicle with the flag leaf at the tip and the panicle bra...

Embodiment 2

[0055] A method suitable for sugarcane hybrid seed production in China's tropical monsoon climate region, the sugarcane parent intercepts the upper half of the panicle stem when it blooms, and moves it to a hybrid greenhouse for isolation and directional hybridization according to the hybrid combination, which is characterized in that it includes the following steps:

[0056] (1) sugarcane parent planting:

[0057] This step is the same as the first embodiment.

[0058] (2) Spike root-promoting treatment:

[0059] The difference between this step and Example 1 is that the parental strains that are planned to be the female parent and the male parent are all treated with root-promoting panicle stems, and the method is the same as step (2) in Example 1.

[0060] (3) Harvesting and conservation of ear stems:

[0061] The ear stems of the female parent and the male parent that have been treated by step (2) for root promotion are arranged to be harvested when 1 / 3 to 1 / 2 of the flo...

Embodiment 3

[0067] A method suitable for sugarcane hybrid seed production in China's tropical monsoon climate region, the sugarcane parent intercepts the upper half of the panicle stem when it blooms, and moves it to a hybrid greenhouse for isolation and directional hybridization according to the hybrid combination, which is characterized in that it includes the following steps:

[0068] (1) sugarcane parent planting:

[0069] This step is the same as the first embodiment.

[0070] (2) Spike root-promoting treatment:

[0071] The difference between this step and Example 1 is that the parental lines that are planned to be female parents are not subjected to the root-promoting treatment of panicles and stems, that is, this step is omitted.

[0072] (3) Harvesting and conservation of ear stems:

[0073] The fringe stem of male parent and female parent is cut from the seedling of step (1), and after 5 o'clock in the afternoon the day before hybridization, more than 75% of the spikes are ext...

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PUM

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Abstract

The invention relates to the technical field of sugarcane crossbreeding, and provides a method for sugarcane crossbreeding in tropical monsoon climate areas of China. The method comprises the steps of planting sugarcane parents, root inducing treatment of ear stems, cutting and caring the ear stems, isolated crossbreeding and artificial subsidiary pollination, and management of seed ripen process. The method is remarkably characterized in that the ear stems of the sugarcane which are dispersed in a parent nursery or different parent breeding places are cut and transported to a crossbreeding greenhouse when the sugarcane parents blossom, and are subjected to directed hybridization in proper conditions; and during the hybridization period, the ear stems are not influenced by adverse climate conditions, so the method has high breeding efficiency and strong practicability, and realizes high centralization of management.

Description

Technical field: [0001] The invention relates to the technical field of sugarcane hybrid breeding. technical background: [0002] Sexual hybrid breeding is the most important way to improve sugarcane varieties. Sugarcane flowering and hybrid seed production have strict requirements on environmental conditions. The conditions of light, temperature, and humidity in the four stages of flower bud differentiation, pollen development, pollination and fertilization of parent materials must be met at the same time, so as to achieve directional hybridization and obtain hybrid seeds. More than 100 years of experience in sexual hybrid breeding of sugarcane in the world shows that conditions such as photoperiod and temperature between 10° and 20° north and south latitude are conducive to sugarcane hybrid seed production. In my country, tropical monsoon climate areas, especially the southern tip of Hainan Province, have superior natural conditions required for sugarcane flowering and h...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01G1/00A01G31/00A01N3/02
Inventor 邓海华李奇伟张垂明符成胡后祥陈勇生
Owner GUANGZHOU SUGARCANE IND RES INST
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