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Method for seed selection for new variety wheat

A new variety, wheat technology, applied in the directions of botanical equipment and methods, application, plant genetic improvement, etc., can solve the problems affecting the effect of recurrent selection, increase the plant height of the rotation selection group, etc., and achieve the improvement of yield and quality, variety and quantity. big effect

Inactive Publication Date: 2006-09-13
CROP BREEDING & CULTIVATING INST CHINESE ACAD OF AGRI SCI
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AI Technical Summary

Problems solved by technology

Due to the recurrent selection of Taigu nuclear sterile wheat, it is necessary to identify the fertile plants and sterile plants in the population within a few days from heading to flowering, and mark them, so there are great difficulties; especially in the recurrent population Plant height increases round by round, affecting the effect of reincarnation selection

Method used

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  • Method for seed selection for new variety wheat

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Effect test

Embodiment 1

[0019] Embodiment 1, cultivating dwarf wheat

[0020] Taigu GMS Nongda 139 wheat is a material obtained by crossing Nongda 139 as the recurrent male parent with Taigu GMS wheat and continuously backcrossing the sterile plants selected from the offspring. Its various traits are similar to Nongda 139 wheat, except that Progeny always segregate half male sterile and half male fertile.

[0021] Taigu nuclear sterile Nongda 139 wheat (genotype Ms2ms2 Nongda 139) was used as the female parent, and Aibian 1 homozygous (Rht10Rht10) wheat (purchased from the Variety Resources Institute of the Chinese Academy of Agricultural Sciences) was used as the male parent. The Aibian No. 1 homozygote with a plant height of 30cm was pollinated with the Taigu GMS Nongda 139 with a plant height of 90cm, and 260 F 1 In the generation, 128 plants showed dwarf (45cm) male sterile, and the remaining 132 plants showed dwarf (45cm) male fertile, the ratio of the two was 1:1. then F 1 The obtained dwarf...

Embodiment 2

[0026] Embodiment 2, utilizing the dwarf wheat of embodiment 1 to breed new wheat varieties

[0027] Utilize the flow process of the dwarf wheat of embodiment 1 to breed new wheat varieties as follows figure 1 As shown, the specific steps are as follows:

[0028] 1. Take the dwarf wheat of Example 1 as the female parent, and use the excellent varieties or lines with the target traits (such as the high-yielding parents that can be purchased at the Institute of Crop Variety Resources, Chinese Academy of Agricultural Sciences: Nongda 139, Beijing 837, Beijing 14 , Jinan 16, Neixiang 182, Yannong 18, Qunxuan 312, Caucasus, BT881, Pindong 38, Pindong 40, Wan 7107; resistant parents: Fengkang 13, Jimai 20, Xiaoyan 54, Shijiazhuang 8, Pindong 36, Luo Fulin 10 and other 18 excellent varieties or lines) were used as male parents for crossing. In each cross combination, 10 parent plants were crossed separately to obtain 18 F 1 generation seeds. F 1 Fifty dwarf male sterile plants o...

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Abstract

A method for selectively culturing the new variety of wheat includes such steps as respective crossing between the wheat 'Aibai' as female parent and 15-20 excellent varieties as male parent to obtain F1 generation, respective backcrossing between the dwarf sterile plants as female parent and the said male parent to obtain the backcrossed seeds F1, mixing them together, free pollination between fertile plants and sterile plants to obtain the seeds, mixing, free pollination between dwarf sterile plants and non-dwarf fertile plants to obtain seeds A, controlled pollination between the high-quality dwarf sterile plants as female parent and the specific plants as male one to obtain seeds B, proportionally mixing seed A with B, repeating said steps to obtain improved group, and culturing the excellent fertile plants by genealogical method.

Description

technical field [0001] The invention relates to a method for breeding new varieties of wheat. Background technique [0002] Recurrent selection is an advanced breeding method, which has been proven by the practice of population improvement of cross-pollinated crops such as maize. Self-pollination crops must have suitable tools and materials in order to successfully carry out recurrent selection and effectively carry out population improvement. Male sterility is a tool material for large-scale production of hybrids, but the offspring of nuclear-cytoplasmic interaction male-sterile materials all carry male-sterile cytoplasm, which is obviously not suitable for use as a tool for genetic improvement. Self-pollination crops such as barley, wheat and soybean all have examples of recurrent selection using recessive genetic sterile materials. Outcrossing characteristics are not ideal enough, thus affecting the improvement of reincarnation selection effect. Taigu GMS wheat is a do...

Claims

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Application Information

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IPC IPC(8): A01H1/02
Inventor 刘秉华王山荭杨丽
Owner CROP BREEDING & CULTIVATING INST CHINESE ACAD OF AGRI SCI
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