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A Breeding Method of Flax Male Sterile Line with High Stigma Exposure Rate and High Outcrossing Rate

A technology of male sterile lines and exposed stigmas, applied in botany equipment and methods, applications, plant gene improvement, etc., can solve the problem of low outcrossing rate of male sterile lines in hybrid flax seed production, and achieve the goal of avoiding short-term unfavorable temperatures Effect, many branches and stems per plant, easy to popularize

Active Publication Date: 2016-11-16
甘肃省农业科学院作物研究所
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for breeding flax male sterile lines with high stigma exposure rate and high outcrossing rate to solve the problem of low outcrossing rate in hybrid flax seed production male sterile lines

Method used

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  • A Breeding Method of Flax Male Sterile Line with High Stigma Exposure Rate and High Outcrossing Rate
  • A Breeding Method of Flax Male Sterile Line with High Stigma Exposure Rate and High Outcrossing Rate
  • A Breeding Method of Flax Male Sterile Line with High Stigma Exposure Rate and High Outcrossing Rate

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Embodiment 1

[0032] Embodiment 1. Breeding process of flax male sterile line with high stigma exposure rate and high outcrossing rate:

[0033] Sources of parents and matching principles: The parent combination of the male sterile line is 5S×Tianya 6, both of which are excellent varieties with large differences in genetic background and certain complementary traits.

[0034] 1, image 3 The characteristics of the female 5S anthers are shown, indicating that the males are aborted, the anthers are milky white, and the stigma does not expose the anthers. The female sterile line is a temperature-sensitive recessive nuclear gene male sterile line 5S, which is precocious, high-yield, outstanding disease resistance, good quality, excellent comprehensive traits, blue petals, but the rate of exposed stigma Low. (The female parent 5S comes from the Crop Research Institute of Gansu Academy of Agricultural Sciences, and the institute provides the purchase), and the hybrid Longyaza No. 1 bred by usin...

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Abstract

The invention discloses a breeding method of a flax male sterility line with high stigma exertion rate and outcrossing rate. According to the breeding method, a thermo-sensitive recessive genic male sterile line is taken as the female parent, flax line with big stigmas and large stigma exertion rate is taken as the male parent, and hybridized combination is designed, wherein the stigmas of the male parent are obviously higher than anthers. Separated F2-F5 offsprings are subjected to stigma exertion property, sterility performance, and economical character selection; stable lines are subjected to ecological identification and outcrossing rate identification after F6; and the flax male sterility line with high stigma exertion rate and outcrossing rate is selected. The obtained novel sterile line possesses obviously exposed stigmas, capability on receiving foreign pollen and outcrossing seed-setting rate are improved substantially.

Description

technical field [0001] The invention belongs to the field of crop breeding and relates to a method for selecting flax male sterile lines. Background technique [0002] Flax belongs to the annual herbaceous plant of Linaceae, which is an important fiber crop and oil crop. Utilizing heterosis is an extremely effective way to improve crop yield and quality, and it is also a common development trend of various crop breeding. The improvement of flax varieties is an important way to increase the yield and quality of flax, and to promote the development of flax production. With the improvement of production level and the wide application of existing resource materials, conventional breeding methods are becoming more and more difficult to meet the requirements of production development. [0003] Studies have shown that the F1 generation of flax varieties has a heterosis rate of 25-40% or even higher, and the utilization of heterosis will be an effective way to increase the yield o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01H1/02A01H1/04
Inventor 张建平党占海王利民党照赵利赵玮李闻娟
Owner 甘肃省农业科学院作物研究所
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