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Culture method of hybrid corn new variety Yufeng 303 suitable for seed machine harvesting

A breeding method and technology for new varieties, applied in the field of new varieties of hybrid corn, can solve the problems of difficulty in new varieties of corn and low rate of grain breakage

Active Publication Date: 2017-08-01
北京联创种业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the many types of parents and complex breeding conditions, the setting of the threshold value of each trait in the breeding goal varies from person to person, and changes in different environments. It is not easy, especially with the rapid development of mechanical harvesting of corn, especially machine harvesting of grains. Machine harvesting of grains has certain requirements on the moisture content of corn kernels. This makes the breeding goal of corn not only the traditional high yield, strong stress resistance, and excellent disease resistance, but also has the characteristics of lodging resistance, fast dehydration, low grain water content, easy threshing, and low grain breakage. The characteristics of mechanical harvesting, which put forward higher requirements for hybrid breeding

Method used

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  • Culture method of hybrid corn new variety Yufeng 303 suitable for seed machine harvesting
  • Culture method of hybrid corn new variety Yufeng 303 suitable for seed machine harvesting
  • Culture method of hybrid corn new variety Yufeng 303 suitable for seed machine harvesting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The parent CT01 used in this example is the female parent of Zhongke No. 1, and the plant variety right number of Zhongke No. 1 is CNA20040034.7, all of which were cultivated by Beijing Lianchuang Seed Co., Ltd.

[0052] The breeding method of the female parent CT1669 (or its reciprocal male parent), including:

[0053] (1) Crossbreed in Hainan with the inbred line CT01 and the American line PH6WC as parents, and then backcross the obtained seeds with the American line PH6WC to obtain backcross F1 generation seeds;

[0054] (2) Plant backcross F1 generation seeds in Zhengzhou, and obtain F2 generation seeds by self-crossing;

[0055] (3) With a planting density of 4500 plants / mu, F2 generation seeds were planted in the Hainan stem rot spectrum and under the onset conditions of southern rust, bagged and self-crossed, and the incidence of stem rot and southern rust were selected to be no higher than 3. grade, and the ear with a grain cutin content greater than 70%, to ob...

Embodiment 2

[0068] The parent CT019 used in this example has a plant variety right number of CNA20060507.0, which was cultivated by Beijing Lianchuang Seed Co., Ltd.;

[0069] The male parent CT3354 (or its reversing female parent) was bred by Beijing Lianchuang Seed Co., Ltd.;

[0070] Breeding methods for the male parent CT3354 (or its reciprocal female parent) include:

[0071] (1) After crossing CT019 and American line PH4CV as parents in Hainan, backcross with American line PH4CV to obtain backcross F1" generation seeds;

[0072] (2) F1 "generation seeds were planted in Zhengzhou, and F2" generation seeds were obtained by bagging and self-crossing;

[0073] (3) With a planting density of 4500 plants / mu, F2" generation seeds were planted in the Hainan stem rot spectrum and under the occurrence conditions of southern rust, bagged and self-crossed, and the incidence of stem rot and southern rust was selected to be no higher than 3 grade, and the ear with grain cutin content greater th...

Embodiment 3

[0086] The CT1669 cultivated in Example 1 is used as the female parent (or its reversing male parent), and the CT3354 cultivated in Example 2 is used as the male parent (or its reversing female parent) to cross, and the described seed suitable for machine harvesting is bred. Breeding method of new hybrid corn variety Yufeng 303.

[0087] The biological characteristics of the hybrid maize new variety suitable for grain machine harvesting that the present embodiment cultivates are:

[0088] It takes 125 days from emergence to maturity in the spring corn area of ​​North East China. Leaf sheaths of seedlings are purple, leaf margins are green, anthers are lavender, and glumes are green. The plant type is semi-compact, the plant height is 296 cm, the ear height is 105 cm, and the number of adult leaves is 20. The filaments are lavender, the ear is tube-shaped, the ear length is 19 cm, the number of ear rows is 14-18, the cob is red, the grain is yellow, half-spur tooth shape, and...

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Abstract

The invention provides a culture method of hybrid corn new variety Yufeng 303 suitable for seed machine harvesting. America lines PH6WC and CT01 are selected to be used as parents; then, PH6WC is used for backcrossing; in the high-planting-density and various-disease culture environment, the corn selfing line CT1669 with dense planting resistance, elminthosporium maydis resistance, stem rot resistance, southern corn rust resistance and high seed cutin content is cultured, and is hybridized with a male parent CT3354 with disease resistance, dense planting resistance, high yield and high seed cutin content, or reciprocal crossing is performed by using CT3354 as a female parent, and hybridization is performed by using CT1669 as a male parent to breed the hybrid corn new variety with high yield, high disease resistance, dense planting resistance, fast dewatering and low seed water content during harvesting. The high dense planting is combined with high-disease-pressure planting; through high-intensity screening, the breeding speed is accelerated; the breeding efficiency is improved; the cultured hybrid corn new variety has high yield, good disease resistance and low seed water content, is suitable for seed machine harvesting and has wide applicability.

Description

technical field [0001] The invention relates to the field of corn breeding, in particular to a method for cultivating a new hybrid corn variety Yufeng 303 suitable for machine-harvested grains. Background technique [0002] Corn alias maize, Latin scientific name Zea mays L., is an annual herbaceous plant of the grass family Zea genus. As one of the three major food crops in my country, corn is the largest food crop after rice in terms of area and total output for 6 consecutive years (since 2010). It is also a feed and industrial raw material crop, with a planting area of ​​36 million hectares 2 The total output is as high as 210-230 million tons. Therefore, the breeding of new maize varieties with excellent traits is very important for the development of agriculture in our country. [0003] At present, the breeding of new corn varieties mostly adopts the method of hybrid breeding. The existing hybrid breeding technology not only needs to carry out hybridization or backcro...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01H1/04
CPCA01H1/02A01H1/04
Inventor 王义波高飞陆安生王爱芬原志强
Owner 北京联创种业有限公司
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