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A method for creating winter blue dwarf wheat

A blue dwarf and winter-resistant technology, applied in the field of wheat breeding, achieves the effect of high popularization and application value and easy guarantee of seed production purity

Active Publication Date: 2018-05-01
SHANDONG BINZHOU HEIMA SEED IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cultivation environment in Sichuan has created its ecological genetic background of weak winter and partial spring

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Example 1: An example of the production of Banwinter Jimai 22 "Lan Aipai".

[0010] (1) In 2008, under the natural ecological conditions of the Yellow River Delta in mid-winter and near-winter, the weak winter-to-spring Dwarf CMS line (namely "Blue Dwarf CMS") was sown in late October and late autumn in Sichuan Academy of Agricultural Sciences. ”) PM26 [belongs to blue grain (4D / 4E ectopic addition line), dwarf stalk (Rht10), anther abortion (Ms2) three dominant monogenic linkage marker male sterile lines on the 4D chromosome], and adjacent Row-sowing semi-winter and partial-winter male parent Jimai 22, at the flowering stage of wheat in early May 2009, Jimai 22 was used to pollinate PM26 in bags, and the pollinated PM26 wheat ears produced blue and white grains. At the beginning of mid-June, harvest according to the combination, thresh, and select the blue seeds (namely PM26 / Jimai 22 "Lan Dian Bai" CMS) for autumn sowing;

[0011] (2) 6 rows were sown in late autumn i...

Embodiment 2

[0014] Example 2: An example of the creation of winter "Yannong 19" "Lan Dian Bai":

[0015] The procedures, methods, and steps are exactly the same as those used to create the semi-winter Jimai 22 "Blue Dwarf Bai"; only the backcross male parent was changed from Jimai 22 to the winter Yannong 19, but "Winter Blue Dwarf Bai" was finally sown in autumn The date is about 10 days earlier than the normal autumn sowing date in the local field, so as to maintain the selection pressure on winter performance (and frost resistance).

[0016] The "winter blue dwarf" germplasm obtained in the above two examples has strong cold resistance, excellent characters, and is easy to distinguish. It is suitable for large-scale production of "blue dwarf" in the Huanghuai and northern winter wheat regions Wheat hybrids provide a strong guarantee, reduce breeding costs and improve breeding efficiency.

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Abstract

The invention relates to a method for creating winter blue dwarf germplasm wheat. Under the natural ecological conditions of a winter (or semi-winter) ecological zone, the winter (or semi-winter) wheat variety material is used as the male parent. Continuous backcrossing of "Lantaibai" wheat, sorting out blue seeds from the backcrossed "Lantaibai" progeny individuals for autumn sowing, and naturally eliminating the spring (or partial spring) "Languaibai" that are not resistant to frost "Individual plants, select and retain winter "Blue Dwarf" progeny plants with strong anti-freezing ability in the overwintering period and backcross again, and gradually advance the autumn sowing date every year, so as to gradually strengthen the selection of "Winter Blue Dwarf" and backcross By 8‑10 generations, the sterile germplasm of "Lan dwarf bai" with winter and semiwinter genetic backgrounds and three linked markers of blue grain, dwarf stalk and abortion can be created. The transformation of the genetic background of "Blue Dwarf Bai" from spring or partial spring to winter or semi-winter has created conditions for the application of wheat heterosis in the Huanghuai and northern winter wheat regions.

Description

technical field [0001] The invention relates to the technical field of wheat breeding, in particular to a method for creating winter (semi-winter) blue dwarf germplasm wheat. Background technique [0002] Heterosis is ubiquitous in the biological world, and the use of heterosis is an important way to greatly increase crop yield. Wheat is the largest food crop that has not yet been used in large-scale hybrids. People have long expected a breakthrough in the use of heterosis in wheat. At present, the three-line approach of heterosis utilization in wheat is limited by the maintenance ability of the maintainer line and the recovery ability of the restorer line, and no substantial application progress has been made. Due to the influence of climate instability factors, the light-temperature-sensitive pathway has not been widely used in bred varieties. The method of chemical male killing is difficult to control the timing of male killing, so the seed production is restricted, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01H1/02A01H1/04
Inventor 耿爱民武利峰刘渤吴艳芳
Owner SHANDONG BINZHOU HEIMA SEED IND
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