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Breeding method of variety of extremely early-maturing sweet potatoes

A technology for extra-early-maturing and sweet potato, applied in the field of conventional hybrid breeding, can solve the problems of impossible to fully understand the characteristics of varieties, large number of seed varieties, large target groups, etc., to reduce breeding costs, improve breeding accuracy, and comprehensive traits Good results

Active Publication Date: 2019-11-29
CROP RES INST SHANDONG ACAD OF AGRI SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are certain defects in the traditional hybrid breeding method: firstly, the number of F1 seed species is huge, and it is impossible to fully understand the variety characteristics of each seed species in actual operation, and it is easy to have omissions caused by other factors in the breeding process. select
Secondly, the traditional breeding method takes a long time to select and breed early-maturing varieties, and it takes 4-5 years to complete the field identification, and the breeding efficiency is not high
Finally, the traditional breeding method is to select early-maturing varieties on the basis of determining disease resistance, yield, and quality. The target group is huge and the workload is huge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Breeding process

[0026] (1) Hybrid combination configuration

[0027] The early-maturing variety Xiangshao was used as the female parent, and the early-maturing variety Longshu No. 9 was used as the male parent to sexually cross, and 5000 F1 generation hybrid seeds were obtained.

[0028] (2) Single plant screening of F 1 generation sweet potato

[0029] Sow the obtained 5,000 hybrid seeds in the vermiculite powder of the plastic greenhouse, pour enough water, control the temperature of the greenhouse at 25-30°C, and the relative humidity at 80-85%. After 3 days, the seedlings emerge, and after about 50 days, the seedlings The height is 25-30 cm, and a single potato tuber with a tuber tuber expansion diameter greater than 1.2 cm is selected. A total of 35 tuber tubers are selected as the selected seed tuber lines, and then the tuber tubers are continued to be placed at 25-30 ° C, 80-85% relative humidity Under these conditions, it can promote the germination of p...

Embodiment 2

[0039] 1. Breeding process

[0040] (1) Hybrid combination configuration

[0041] The early-maturing variety Xiangshao was used as the female parent, and the early-maturing variety Longshu No. 9 was used as the male parent to sexually cross, and 5000 F1 generation hybrid seeds were obtained.

[0042] (2) Single plant screening of F 1 generation sweet potato

[0043] Sow the obtained 5,000 hybrid seeds in the vermiculite powder of the plastic greenhouse, pour enough water, control the temperature of the greenhouse at 25-30°C, and the relative humidity at 80-85%. After 3 days, the seedlings will emerge, and in about 40 days, the seedlings will grow. The height is 20-25cm, and the single-plant potato cubes with an expanded diameter of more than 0.8cm are selected. A total of 30 tubers are selected as the selected seed potato lines, and then the potato cubes are continued to be placed under the conditions of 25-30°C and 80-85% relative humidity Next, promote the germination of p...

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Abstract

The invention relates to a breeding method of a variety of extremely early-maturing sweet potatoes and belongs to the technical field of conventional hybridization breeding. The method comprises the steps of sowing hybrid seeds through a substrate, wherein the height of seedlings reaches 25+ / -5 cm 45+ / -5 days after sowing; investigating the potato setting condition of the seedlings; selecting a strain with the expanded diameter over 0.8 cm as a new strain of selected seedling potatoes; then, breeding the new strain of extremely early-maturing sweet potatoes. The new variety of the extremely early-maturing sweet potatoes has the advantages of high breeding accuracy rate, short breeding period and low breeding cost.

Description

technical field [0001] The invention relates to a breeding method for extra-early-maturing sweet potato varieties, which belongs to the technical field of conventional cross-breeding. Background technique [0002] Sweet potato is an annual or perennial vine herb. Although there is no fixed growth period, due to the influence of natural conditions and virus accumulation, the actual growth period of sweet potato is 4 months. The normal planting date in the northern potato area is after the first ten days of April, and the normal harvest period is after the first ten days of August. The sweet potatoes stored in the previous year are generally sold out in May, so the supply of sweet potatoes in the northern potato area is empty from June to August. schedule. Extra-early-maturing sweet potatoes refer to sweet potatoes whose diameter exceeds 3cm and weighs more than 200g when the sweet potatoes are planted for 60 days. The planting of early-maturing varieties with a growth perio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G22/25A01H1/02A01H1/04
CPCA01H1/02A01H1/04A01G22/25
Inventor 董顺旭王庆美解备涛王学强
Owner CROP RES INST SHANDONG ACAD OF AGRI SCI
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