Rapid seed selection method of high-anthocyanin purple sweet potato variety

Abstract

The invention relates to a rapid seed selection method of a high-anthocyanin purple sweet potato variety and belongs to the technical field of crossbreeding. The rapid seed selection method comprises the steps that F1-generaiton hybrid true potato seeds are obtained, a citric acid- disodium hydrogen phosphate buffer solution extraction colorimetric method is used for measuring the content of anthocyanin in sweet potato tubers, single plants of fresh tuber with the content of anthocyanin being larger than or equal to 70 mg / 100 g are selected, and rapid breeding and seed breeding are conducted. Because selection according to the index of the content of anthocyanin is conducted in the first step, the materials with the content of anthocyanin being smaller than 70 mg / 100 g are weeded out, and it is guaranteed to the maximum extent that the high-anthocyanin single plants in the filial generation are selected; because the number of single plants selected according to the citric acid- disodium hydrogen phosphate buffer solution extraction colorimetric method is remarkably smaller than that of single plants selected according to a method for observing the color depths of sweet potato pulp with eyes, the number of single plants needing following field authentication is greatly reduced, and the workload is remarkably lightened; a different-place multi-point yield comparison test can be completed in a one-off mode, and the seed breeding time is shortened by 2-3 years.

Description

technical field [0001] The invention relates to a rapid breeding method for purple sweet potato varieties with high anthocyanin content, and belongs to the technical field of hybrid breeding. Background technique [0002] High anthocyanin sweet potatoes are rich in anthocyanins, and the potato flesh is purple or deep purple. Scientific research shows that anthocyanins are a kind of strong antioxidant, which can protect the human body from free radical damage, and have anti-mutation and anti-inflammation properties. Efficacy, and anthocyanin is a water-soluble natural pigment, which can replace the synthetic pigment used in the food processing industry, so the market prospect of high anthocyanin type purple sweet potato is very broad. Since 2003, my country introduced and planted the Japanese fresh purple sweet potato variety Norin 54. In 2004, the Japanese varieties Yamakawa Zi and Yaya Purple were used to process and extract anthocyanins. After 2010, a large number of high ...

AI Technical Summary

Problems solved by technology

There are certain deficiencies in the traditional purple sweet potato hybrid breeding method: First, when matching hybrid combinations, more attention is paid to the yield level and quality traits of the father and mother, and less attention is paid to the anthocyanin content of the parents, and the super-high anthocyanin content of the offspring appears The probability is low; secondly, due to sweet potato self-fertilization and infertility in the same group, the pollination rate of open insect pollination is relatively low; thirdly, the number of F1 hybrid single plant populations screened based on visual inspection of potato flesh color depth and yield level Larger, requiring more manpower and material resources in field identification; generally speaking, it takes 2-3 years to complete subsequent field and indoor analysis and identification of yield, quality, disease resistance, etc.

Therefore, the traditional purple sweet potato hybrid breeding program has a large workload, long breeding period and high cost

Images