Improved field trail test for assessment of sugarcane hybridized combinations

A hybrid combination and field test technology, applied in the field of sugarcane hybrid breeding, can solve the problems of intensifying the competition effect between clones and clones, affecting the objective evaluation of hybrid combinations, and being susceptible to environmental influences, so as to reduce the competitive effect and reduce the competitive effect. , the effect of expanding the seedling base

Inactive Publication Date: 2020-02-04
SUGARCANE RES INST OF YUNNAN ACADEMY OF AGRI SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] Because most of the target traits sought by sugarcane hybrid breeding are quantitative traits, they are not only susceptible to environmental influences, but also under traditional test methods, because each seedling is a clone (genotype), each clone population is very small ( There is only one clump of sugarcane stalks), its performance is not only affected by the environment, but also intensifies the competition effect between clones, which in turn affects the objective evaluation of the performance of the hybrid combination, that is, the evaluation of the genetic effect of the hybrid combination

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] An improved field test method for evaluating sugarcane hybrid combinations, the method is as follows:

[0021] (1) False planting of seedlings: seedlings are sown and cultivated in the seedling cultivation greenhouse with hybrid combination flower spikes, and the sowing time is preferably around mid-April to ensure that the seedlings have sufficient stem-forming time. In good time (the seedlings have about 6 true leaves) the seedlings are falsely planted to the seedbed with a plant spacing of 10cm and a row spacing of 20cm. The seedbed is arranged outdoors and can be convenient for watering and management. 150-200 seedlings were artificially planted in each combination to ensure the number of seedlings required for each combination evaluation. The number of combinations is determined according to the size of the test site;

[0022] (2) Seedling management after artificial planting: After artificial planting, pour enough water for rooting, and water once every other day...

Embodiment 2

[0026] An improved field test method for evaluating sugarcane hybrid combinations, taking 8 hybrid combinations as an example, the method is as follows:

[0027] (1) Sow hybrid spikes around mid-April, and cultivate seedlings for 8 hybrid combinations (combination numbers: A1-A8). When the seedlings grow to about 6 true leaves, the seedlings are artificially planted to the seedbed with a plant spacing of 10cm and a row spacing of 20cm, and the seedbed is arranged outdoors. 150-200 seedlings are artificially planted in each combination to ensure the number of seedling populations required for combination evaluation;

[0028] (2) There are 8-10 or more stem buds in the jointing of the seedlings to be artificially planted, and the seedlings (clones) of each hybrid combination are cut and numbered according to the combination. For example, the A1 combined false plant seedling number is 200 seedlings, and 188 seedlings (clones) have stem buds after surviving, and these 188 seedlin...

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Abstract

The invention discloses an improved field trail test for assessment of sugarcane hybridized combinations. Seedlings are cultivated in a seedling cultivation greenhouse in or around middle April everyyear and temporarily planted by a row spacing of 10cm and a line spacing of 20cm in an outdoor seedbed in or around middle July to form seed stems through stem elongation on the seedbed, and then theseed stems are cut during January to March and planted in a field by a line length of 1.5m and a line spacing of 1m, each line allows planting of one clone, 8 buds of each clone are planted, and eachcombination is planted for three times repeatedly; at the end of the year or the beginning of the next year, agronomic characters and disease symptoms required by combination assessment are collected,and advantages and disadvantages of the combinations are assessed through statistic analysis to provide references for hybridized combination preparation and variety breeding. By adoption of the method, objective trail results can be obtained, reliability of assessment results of the hybridized combinations can be improved, and increasing of sugarcane breeding efficiency is further promoted.

Description

technical field [0001] The invention belongs to the technical field of sugarcane hybrid breeding, in particular to a field test method for evaluating sugarcane hybrid combinations. Background technique [0002] Sugar cane is the main sugar crop in my country, and the sucrose production accounts for more than 90% of the total sugar in my country. Hybrid breeding is currently the main way to cultivate new varieties of sugarcane, widely adopted by countries all over the world. The "five-field system" breeding is a traditional selection procedure adopted by sugarcane hybrid breeding in my country. The five fields are: hybrid field, seed selection field, identification field, reserve comparison field, and variety comparison field. After being screened by the "five garden system" test, the high-quality materials entered the multi-point regional test and production test for many years, and finally registered and promoted their application. [0003] Hybrid combination is the basis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G22/55A01G7/00
CPCA01G7/00A01G22/55
Inventor 刘家勇赵丽萍陈建国张跃彬武晋宇夏红明胡鑫昝逢刚杨昆覃伟赵勇吴转娣赵培方赵俊姚丽吴才文陈学宽
Owner SUGARCANE RES INST OF YUNNAN ACADEMY OF AGRI SCI
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