Perennial forage maize breeding method

A corn and hybrid technology, applied in the field of perennial forage corn breeding, can solve the problems of tetraploid teosinte seed production difficulties, low actual value, low forage yield, etc., to achieve outstanding yield traits, stress resistance Strong ability and high quality effect

Inactive Publication Date: 2013-10-23
SICHUAN AGRI UNIV
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AI Technical Summary

Problems solved by technology

Due to the different ploidy of tetraploid teosinte and maize, the matability between the two is very low, that is, the hybrid contemporary F 0 Low seed setting rate
At the same time, the difficulty in producing tetraploid teosinte seeds and the poor characteristics of low forage yield make the practical value of conventional distant hybridization or direct use of this material in forage breeding and production small

Method used

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  • Perennial forage maize breeding method
  • Perennial forage maize breeding method
  • Perennial forage maize breeding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1. Screening of maize inbred lines with high seed setting rate hybridized with tetraploid teosinte

[0038] 114 maize inbred lines shown in Table 1 were sown in Xishuangbanna in the fall of the paternal tetraploid teosinte and the female parent. After the male parent and each female parent were crossed separately, the hybrid seed setting rate was measured, and the tetraploid teosinte was obtained. Hybridization of corn inbred lines with high seed setting rate, the specific methods and results are as follows:

[0039] 1. Sowing male and female parents

[0040] The sowing time of the male parent is 20-30 days earlier than that of the female parent. The sowing ratio of the male parent to 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 of the male parent and the female parent is 0.4 meters, the row spacing is 0.75 meters, 2 plants per hole, 4444 per mu strain.

[0041] 2. Detasseling of the F...

Embodiment 2

[0054] Example 2, the application of a corn inbred line with a high seed setting rate hybridized with tetraploid teosinte

[0055] 1. During the period of 25 / 8-25 / 9 in Xishuangbanna, Yunnan, the maize inbred line 2701 (male parent) with low seed setting rate hybridized with tetraploid teosinte and the high seed set rate with tetraploid teosinte were sown at the same time Rate of maize inbred line 2848 (female parent), harvested by hybrid F 1 Seed (2848×2701), the specific method is as follows:

[0056] 1. Sowing male and female parents

[0057] The sowing ratio of the male parent and the female parent is 1:5, that is, 1 mu of the male parent supports 5 mu of the female parent; the plant spacing of the male parent and the female parent is 0.4 meters, and the row spacing is 0.75 meters, 2 plants in every hole , 4444 plants per mu.

[0058] 2. Detasseling of the female parent

[0059] Before the female parent tassel pollen, remove the tassel manually, and cover the female flo...

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Abstract

The present invention discloses a perennial forage maize breeding method. Experiments prove that the character of high seed rate from hybridizing diploid maize and tetraploid Zea perennis is a heritable dominant character. On the basis, the present invention provides a method for breeding Zea mays L. with high seed rate which is hybridized with Zea perennis, the F1 generation of Zea mays L. obtained by the method is used as a female parent, tetraploid Zea perennis is used as a male parent for artificial hybridization, and the obtained hybrid seeds of F1 generation are perennial forage maize seeds. The perennial forage maize bred by the method has the characteristics of short breeding cycle, easiness in operation and high seed yield, and has broad application prospects in production.

Description

technical field [0001] The invention relates to a method for breeding perennial forage corn. Background technique [0002] In the past 10 years, with the development of my country's national economy and the improvement of people's living standards, people's food consumption structure has undergone major changes, and the demand for grass and livestock products such as beef and mutton has become higher and higher. From 1978 to 2008, although the per capita beef and milk production in my country increased by 20 times and 30 times respectively, they still cannot meet people's needs. This undoubtedly requires more forage to support the rapid development of animal husbandry. Breeding and promotion of fine forage varieties is the premise and basis for the coordinated development of feed, forage and animal husbandry. At present, the level of forage grass breeding in my country is still low, and there are problems of few bred varieties and poor quality. Most of the varieties used ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02
Inventor 周树峰张志明兰海高世斌付凤玲荣廷昭唐祈林卢艳丽马啸吴元奇潘广堂胡尔良
Owner SICHUAN AGRI UNIV
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