Hybrid seed production method for forage maize

A technology for hybrid seed production and forage corn, applied in the biological field, can solve the problems of insufficient research on pasture germplasm resources, unsatisfactory agronomic production traits, and imperfect breeding system for improved varieties, and achieves strong asexual reproduction ability, good cold resistance, Strong anti-stress effect

Inactive Publication Date: 2010-09-29
SICHUAN AGRI UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the varieties widely used in my country's forage industry at present, such as ryegrass in winter, alfalfa and teosinte (forage corn in Mexico) in summer, etc., still rely on imports from abroad to a considerable extent, while my country's own forage breeding The level is still very low, the number of bred varieties is not only small, but most of them are directly domesticated wild species, the quality of the products is not high, the agronomic production traits are not ideal, and it is far from meeting the needs of production
The main reasons for this situation are insufficient research on forage germplasm resources, outdated breeding methods, unsound breeding systems for fine varieties, etc.

Method used

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  • Hybrid seed production method for forage maize
  • Hybrid seed production method for forage maize
  • Hybrid seed production method for forage maize

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1 produces forage grass SC2 seed

[0036] The male and female parents were produced in Xishuangbanna in autumn. The male parent was teosinte (Zea mays ssp. mexicana; Mexican forage maize, code mex; publicly available free from the Mexican Wheat and Maize Improvement Center). The female parent is a three-cross maize, which is composed of Chuandan 14 (purchased from Sichuan Chuandan Seed Industry Co., Ltd.) and maize inbred line 068 (Ren Yong, research on the biological characteristics and nutritional value of forage maize) , Master Thesis of Sichuan Agricultural University, 2006; publicly available from Sichuan Agricultural University.) Obtained by hybridization.

[0037] 1. Sow the male parent and the female parent.

[0038] The sowing time of the male parent is 8 days ahead of the sowing time of the female parent; the sowing ratio of the male parent and the female parent is 1:3, that is, 1 mu of the male parent is matched with 3 mu of the female parent; T...

Embodiment 2

[0082] Embodiment 2 produces forage grass SC2 seed

[0083] The male parent is teosinte (Zea mays ssp. mexicana; Mexican forage corn, numbered mex), and the female parent is a three-cross maize, obtained by crossing Chuandan 14 and maize inbred line 068.

[0084] 1. Sow the male parent and the female parent.

[0085] The sowing time of the male parent is 9 days ahead of the sowing time of the female parent; the sowing ratio of the male parent and the female parent is 1: 3.5, that is, 1 mu of the male parent supports 3.5 mu of the female parent; the male parent and the female parent The plant spacing is 0.3 meters, the row spacing is 0.5 meters, 2 plants per hole, 4000 plants per mu.

[0086] In order to obtain a higher seed yield, the suitable sowing date of the female parent is 20 / 8-25 / 9 days, and the sowing date of the male parent should be 9 days earlier. The sowing date is too early, and the temperature after pollination is too high, which is not suitable for grouting. ...

Embodiment 3

[0095] Embodiment 3 produces forage grass SC2 seed

[0096] The male parent is teosinte (Zea mays ssp. mexicana; Mexican forage corn, numbered mex), and the female parent is a three-cross maize, obtained by crossing Chuandan 14 and maize inbred line 068.

[0097] 1. Sow the male parent and the female parent.

[0098] The sowing time of the male parent is 10 days ahead of the sowing time of the female parent; the sowing ratio of the male parent and the female parent is 1:4, that is, 1 mu of the male parent is matched with 4 mu of the female parent; The plant spacing is 0.5 meters, the row spacing is 1 meter, 2 plants per hole, 4500 plants per mu.

[0099] 2. Hormone spraying and detasseling of the female parent

[0100] When the female parent is in the large mouth stage (i.e. 10-11 leaves, plant height 150-160cm (please verify)), spraying 45ml "Xi Shimei" per mu can effectively reduce the plant height and ear position of the female parent , to facilitate artificial pollinati...

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Abstract

The invention discloses a hybrid seed production method for forage maize. In the method, teosinte serves as a male parent and maize tri-crossed hybrid serves as a female parent to produce a forage maize SC2 seed in a hybrid way. The hybrid production comprises the following steps of: 1) sowing the male parents and the female parents at time intervals to obtain the male parents having blossom intervals and the female parents having the blossom intervals; 2) performing hormone spraying and tassel removal on the female parents having the blossom intervals obtained in the step 1) to obtain the tassel-removed female parents having lower plant heights and lower ear heights; 3) trimming the subtending leaves of the tassel-removed female parents having the lower plant heights and the lower ear heights obtained in step 2) to obtain un-pollinated female parents; and 4) collecting the pollen of the male parents having the blossom intervals obtained in the step 1), pollinating the un-pollinated female parents obtained in the step 3) by using the pollen and culturing the pollinated female parents to obtain the forage corn SC2 seeds. Experiments of the invention show that plant obtained by planting the forage maize SC2 seed obtained by the method of the invention is gramineous pasture having high quality.

Description

technical field [0001] The invention relates to a hybrid seed production method of forage corn in the field of biology. Background technique [0002] Feed and forage grass are the foundation of the development of animal husbandry. Compared with developed countries and domestic fast-growing animal husbandry, there is a big gap between the development of feed and forage grass in my country. The development of animal husbandry in agricultural areas in southern my country has long relied on high grain consumption and straw after harvesting grains. This development model is not only difficult to meet the rapid growth of feed demand brought about by the vigorous development of animal husbandry in the south, but will undoubtedly Aggravate the national "food security" problem. In fact, the current pressure on my country's "grain security" is no longer the shortage of food rations, but the serious shortage of meat, eggs, and milk feed grains caused by human and animal food for a long...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02
Inventor 周树峰唐祈林荣廷昭潘光堂兰海高世斌张明强郑名敏
Owner SICHUAN AGRI UNIV
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