Method for breeding normal corn inbred line by using hard grain type waxy corn inbred line

An inbred, waxy maize technology, applied in the directions of botanical equipment and methods, application, plant genetic improvement, etc., can solve the problems of short volume and long-term, fast grain dehydration, fast filling speed, etc., to broaden the genetic basis, shorten the The effect of growth period and quality improvement

Active Publication Date: 2016-08-24
SHANDONG ZHONGNONG TIANTAI SEEDS CO LTD
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  • Summary
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the grain filling process of waxy corn shows the characteristics of shorter grain filling period, faster grain filling speed, faster grain dehydration, and shorter growth period.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The specific steps of "Breeding common corn inbred lines into hard-grain type and early-maturing corn inbred lines by using hard-grain waxy corn inbred lines":

[0028] Step 1: From May to September 2006, 5-8 plants were crossed in Linyi with TT789 as the female parent and Tian Nuo 3 as the male parent to obtain hybrid ears and single ear threshing.

[0029] The second step: From October 2006 to March 2007, after planting the hybrid ears in Hainan, use TT789 as the male parent to backcross 5-8 lines to obtain backcross ears, single ear threshing, and select hard non-waxy corn kernels .

[0030] Step 3: From May to September 2007, plant 50 plants with the selected kernels in Hainan, use TT789 as the male parent to backcross, obtain backcrossed ears, thresh single ears, and select hard non-waxy corn kernels.

[0031] The fourth step: From October 2007 to March 2008, in Linyi, the selected grains will be planted into 30 ears according to the ears, and 15 of them will be u...

Embodiment 2

[0036] The specific steps of "Breeding common corn inbred lines (pursines) into hard-grained, early-maturing corn inbred lines by using hard-grained waxy corn hybrids":

[0037] The first step: from May to September 2007, Zhengdan 958 was used as the female parent in Linyi, and the waxy corn inbred line Tai Nuo 3 was used as the male parent to cross 5-8 plants to obtain hybrid ears and single ear threshing.

[0038] The second step: from October 2007 to March 2008, after planting the hybrid fruit ears in Hainan, use Zhengdan 958 as the male parent to backcross 5-8 lines to obtain backcross fruit ears, single ear threshing, and select hard grains and non-waxy corn kernels.

[0039] Step 3: From May to September 2008, plant 50 plants with the selected kernels in Hainan, and use Zhengdan 958 as the male parent to backcross to obtain backcrossed ears, threshing single ears, and select hard non-waxy corn kernels.

[0040] The fourth step: From October 2008 to March 2009, in Linyi,...

Embodiment 3

[0045] Breeding methods for new common corn varieties:

[0046] The first step: From May to September 2012, plant 250 common corn inbred lines TT201203056 and TT201203086 in Linyi, and configure 160 corn hybrid combinations with 80 common corn inbred lines from different sources. 3 ears, each hybrid combination was threshed separately and numbered.

[0047]The second step: from October 2012 to March 2013 in Hainan, from May 2013 to September 2013 in Linyi, Jinan, Heze, and Jining, from October 2013 to March 2014 in Hainan to combine 180 hybrid combinations The seeds were identified for disease resistance, ecological adaptability and yield in different regions. After identification and comparison, the three combinations of TTZH2014089, TTZH2014121 and TTZH2014332 performed well, and the main characteristics are as follows:

[0048] TTZH2014089 seedlings have light purple leaf sheaths, dark green leaves, and strong growth. The plant type is compact, the growth period is 101 da...

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Abstract

The invention discloses a method for breeding a normal corn inbred line by using a hard grain type waxy corn inbred line. According to the method, a corn inbred line is bred with a method of one-time hybridization of the early-maturing hard grain type waxy corn inbred line and repeated backcrossing of normal corn, so that rapid breeding of a new normal corn species with excellent quality, high unit weight and early maturity is realized. With the adoption of the method, the quality of the normal corn inbred line is improved, the hereditary basis of normal corn is widened, types of the normal corn are enriched, the corn growth period is shortened, and the method has the important social significance and economic value.

Description

technical field [0001] The invention relates to a method for improving and breeding common corn inbred lines by using hard-grain type waxy corn inbred lines, and belongs to the technical field of new agricultural variety breeding. Background technique [0002] Corn is one of the main food crops in China. At present, there are more than 500 million mu of corn in China, and the annual output accounts for 35% of the total grain output. It can be said that corn production is very important to food production, animal husbandry development and farmers' life. [0003] The increase of maize yield and total yield in my country largely depends on the continuous improvement of maize breeding level. Among the many factors for increasing production, the contribution rate of new varieties of corn reached 40%. Based on the increasingly important status of corn in my country's grain production, the selection and breeding of new corn varieties is also becoming more and more important. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04
CPCA01H1/02A01H1/04
Inventor 刘宁刘西美石绪海鲁亚萍杨蒙姬艳艳张文超
Owner SHANDONG ZHONGNONG TIANTAI SEEDS CO LTD
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