Breeding method for convergent improvement of carotene and dry rate characters of sweet potato

A carotene and dry rate technology, applied in the directions of botanical equipment and methods, plant genetic improvement, application, etc., can solve the problems affecting the edible quality of high-carotene varieties, affecting the nutritional value and color, etc., and achieve the improvement of dry rate and carrot. The effect of vegetative traits, promotion of product quality, and short breeding cycle

Active Publication Date: 2013-05-22
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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Problems solved by technology

[0005] However, existing studies also show that there is an obvious negative correlation between the carotene content and the dry rate of sweet potatoes, that is, varieties with high carotene content (10mg or above / 100g fresh weight) tend to have a low dry rate (below 25%) , thereby affecting the eating quality of high-carotene varieties; for example, the two high-carotene varieties "Victory" (bred by Hebei Academy of Agricultural Sciences) and "Zheshu 81" (bred by Zhejiang Academy of Agricultural Sciences) that have passed national identification, carrot The carotene content is 15.7 and 16.03mg / 100g respectively, and the dry rate is 24.5% and 23.88% respectively; while the varieties with a dry rate above 30% hardly contain carotene, which affects their nutritional value and color

Method used

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  • Breeding method for convergent improvement of carotene and dry rate characters of sweet potato
  • Breeding method for convergent improvement of carotene and dry rate characters of sweet potato
  • Breeding method for convergent improvement of carotene and dry rate characters of sweet potato

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Experimental program
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Embodiment 1

[0029] (1) Screening of breeding parents: In the first year, from the existing sweet potato germplasm resources Gem×Zheshu 73 Ban 2, Jishu 4×Honghong 1, Yanshu 5×Zhezhou 8464, AIS0122-2× Among the intermediate materials after hybridization of Xushu 18 and Nanruitao×Zheshu 1, the materials with all the following characteristics were selected:

[0030] 1) Carotene content is 8-16mg / 100g fresh weight;

[0031] 2) The dry rate is between 22% and 25%;

[0032] 3) The dry base starch rate is 60% to 70%;

[0033] 4) The male parent of the breeding parent is a variety with a high dry rate of 30% to 35%;

[0034] 5) The parents of the breeding parent are different from the parents of other selected breeding parents;

[0035] 3481, 492, 1347, 738 and 255 were respectively obtained as breeding parents (Table 2);

[0036] Table 2: 5 high-carotene materials screened out

[0037] Strain number source carotene dry rate Starch percentage on dry basis...

Embodiment 2

[0050] (1) Screening of breeding parents: In the first year, from the existing sweet potato germplasm resources Gem×Honghong 1, AIS0122-2×Zheshu 1, Jishu 4×Zheshu 73ban 2 and Sushu 8 Among the intermediate materials after crossing Xushu 18, 3449, 70943, 181-51 and Qo002 were selected as breeding parents according to the same standard as in Example 1 (Table 5);

[0051] Table 5: 4 high-carotene materials screened out

[0052] Strain number source carotene dry rate Starch percentage on dry basis 3449 Gem × Honghong No. 1 15mg / 100g 24.0% 63% 70943 AIS0122-2×Zheshu No.1 13mg / 100g 25.0% 66% 181-51 Jishu No. 4×Zheshu 73 and a half 2 10mg / 100g 22.0% 68% Qo002 Su Shu No. 8 × Xu Shu 18 8mg / 100g 23.0% 60%

[0053] (2) Determination of father and mother parents and design of incomplete diallel hybridization: in the autumn of the first year, sort the selected parents according to their carotene content from high to low (T...

Embodiment 3

[0065] (1) Screening of breeding parents: in the first year, from the existing sweet potato germplasm resources Gem×Honghong 1, Yanshu 5×Zhezhou 8464, AIS0122-2×Xushu 18 and Nanrui Tiao×Zheshu 1 Among the intermediate materials after hybridization, 3449, 1347, 738 and 255 were selected as breeding parents according to the same standard of Example 1 (Table 8);

[0066] Table 8: 4 high-carotene materials screened out

[0067] Strain number source Carotene mg / 100g dry rate Starch percentage on dry basis 3449 Gem × Honghong No. 1 15 24.00% 63% 1347 Yanshu No. 5×Zhezhou 8464 13 24.00% 60% 738 AIS0122-2×Xushu 18 11 25.00% 67% 255 Nanrui Potato×Zheshu No.1 10 24.50% 70%

[0068] (2) Determination of father and mother parents and design of incomplete diallel hybridization: in the autumn of the first year, after sorting the selected parents according to their carotene content from high to low (Table 8), one by one from high ...

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Abstract

The invention discloses a breeding method for convergent improvement of carotene and dry rate characters of sweet potato, belonging to the technical of breeding of varieties of crops. The breeding method comprises the steps of: screening breeding parents; determining a male parent and a female parent and designing incomplete diallel cross; screening an optimal parental combination; and screening a breeding target variety. The breeding method is short in breeding period and high in speed; and the content of the carotene is increased, the dry rate characters are improved, the constant restraint of the breeding of the sweet potato by the remarkable negative correlation characteristic of the content of the carotene and the dry rate is broken through, the content of the carotene reaches 8-10mg / 100g, the dry rate reaches 28-30 percent or the dry rate reaches 32-36 percent and the content of the carotene reaches 1-5mg / 100g, and thus the improvement of the quality of the sweet potato is effectively promoted. The breeding method can be popularized and applied to the breeding of the sweet potato.

Description

technical field [0001] The invention relates to the technical field of crop breeding, in particular to a method for polymerizing and improving sweet potato carotene and dry rate traits. Background technique [0002] Carotene is an important nutritional quality index of sweet potato. As the precursor of vitamin A, carotene has been fully confirmed in its physiological activity and has been used in night blindness, anti-photosensitivity, and some skin diseases and anti-cancer treatments. Plant-derived carotene is internationally recognized. It is used as a simple and easy-to-use bioaugmentation program for nutritional intervention of children in underdeveloped areas. [0003] Carotene is bright orange-red to orange-yellow. Generally, red sweet potatoes are rich in carotene, followed by yellow sweet potatoes, and white-fleshed sweet potatoes contain almost no carotene. The carotene content in all kinds of sweet potatoes ranges from 0 to 20mg / 100g fresh weight. In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04
Inventor 吴列洪沈升法李兵季志仙
Owner ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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