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Method for breeding homotype waxy corn selfing line by sweet corn selfing line

A technology of inbred and waxy corn, applied in the direction of botanical equipment and methods, application, plant genetic improvement, etc., can solve the problem of loss of edible value, etc., and achieve the effect of good quality, convenient selection and operability, and thin peel

Active Publication Date: 2014-05-21
NANJING INST OF VEGETABLE SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although waxy corn and sweet corn belong to the same type of fresh corn, they are controlled by different genetic loci. After crossing each other, they become non-waxy and non-sweet corn, that is, conventional corn, which loses its original edible value.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The specific steps of "backcrossing waxy corn hybrids into homotype waxy corn inbred lines using common sweet corn inbred lines":

[0021] Step 1: From March to June 2005, use "Yu Nuo 7 (National Examination Jade 2003069)" (genotype wxwxSu) in Nanjing 1 Su 1 ) as the female parent, common sweet corn inbred line “984” (genotype WxWx su 1 su 1 ) as the male parent to cross 2 to 3 plants to obtain hybrid ears (genotype WxwxSu 1 su 1 ), single ear threshing;

[0022] Step 2: From July to October 2005, the hybrid ear seeds were planted in Nanjing, and 2 to 3 plants were backcrossed with "984" as the male parent to obtain the backcross ear (grain genotype is Wx Su 1 su 1 or Wx su 1 su 1 ), threshing a single ear, and selecting non-sweet kernels (genotype Wx Su 1 su 1 );

[0023] The third step: From November 2005 to February 2006, 100 plants with non-sweet seeds obtained in the second step were planted in Hainan, all of which were bagged and self-crossed, and the e...

Embodiment 2

[0026] The specific steps of Example 2 "Using enhanced sweet corn inbred lines to backcross waxy corn inbred lines into homotype waxy corn inbred lines":

[0027] The first step: From March to June 2006, the waxy maize inbred line "Tongxian 5" (genotype wxwxSu 1 Su 1 SeSe) as the female parent to strengthen the sweet corn inbred line "Mo17su 1 su 1 sese” (genotype WxWx su 1 su 1 sese) to cross 2 to 3 plants as the male parent to obtain hybrid ears (genotype WxwxSu 1 su 1 Sese), single ear threshing;

[0028] The second step: from July to October 2006 in Nanjing, after planting the hybrid ear seeds, use "Mo17su 1 su 1 sese" is backcross 2 to 3 plants of the male parent, and the backcross ear (grain genotype is Wx Su 1 su 1 or Wx su 1 su 1 ), threshing a single ear, and selecting non-sweet kernels (genotype Wx Su 1 su 1 );

[0029] The third step: From November 2006 to February 2007, 100 plants with non-sweet grains obtained in the second step were planted in Hain...

Embodiment 3

[0032] Example 3: The specific steps of "Breeding Waxy Corn Landrace Varieties into Homotype Waxy Corn Inbred Lines Using Super Sweet Corn Inbred Lines":

[0033] Step 1: From March to June 2006, use "Silunuo (a local variety in Yunnan)" (genotype wxwxSh) in Nanjing 2 Sh 2 ) as the female parent, super sweet corn inbred line "403-11" (genotype WxWx sh 2 sh 2 ) as the male parent to cross 2 to 3 plants to obtain hybrid ears (genotype WxwxSh 2 sh 2 ), single ear threshing;

[0034] Step 2: From July to October 2006, plant hybrid ear seeds in Nanjing and use “403-11” as the male parent to backcross 2 to 3 plants to obtain backcross ear (grain genotype is Wx Sh 2 sh 2 or Wx sh 2 sh 2 ), single-ear threshing, and non-sweet kernels were selected (genotype Wx Sh 2 sh 2 );

[0035] The third step: From November 2006 to February 2007, 100 plants with the non-sweet seeds obtained in the second step were planted in Hainan, all of which were bagged and self-crossed, and the ear...

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Abstract

The invention relates to a method for breeding homotype waxy corn selfing line by sweet corn selfing line. The method comprises the steps of (1) selecting waxy corn resource as female parent and sweet corn selfing line as male parent to obtain cross-bred clusters; (2) planting seeds of the cross-bred clusters, and taking sweet corn selfing line as male parent to obtain backcross clusters; (3) threshing the backcross clusters, selecting and remaining non-sweet seeds, planting single seeds, carrying out single plant bagging selfing, selecting clusters with waxy seeds, threshing single clusters, and selecting and remaining waxy non-sweet seeds; (4) planting the waxy non-sweet seeds selected and remained by step (3), repeating three cycles from step (1) to step (3) to obtain the waxy corn selfing material which has the same type as the sweet corn selfing line; and (5) carrying out single seed planting on the selfing material obtained in step (4), carrying out single plate bagging selfing, and selecting the clusters without sweet seeds to be threshed to obtain the waxy corn selfing line which has the same type as that of the sweet corn selfing line.

Description

technical field [0001] The invention relates to a method for breeding same-type waxy corn inbred lines by using sweet corn inbred lines, and belongs to the technical field of new agricultural variety breeding. Background technique [0002] Breeding of inbred lines is an important link in the cultivation of new agricultural varieties, and fresh edible waxy corn is no exception. In recent years, with the improvement of people's living standards and the strengthening of health awareness, people have put forward higher and higher requirements for the taste and quality of fresh waxy corn products. However, the existing waxy corn breeding resources are relatively scarce, with good quality and resistance. Good, high-yielding resources are especially scarce. Breeders have been looking for new ideas and methods for germplasm innovation of waxy maize. Although waxy corn and sweet corn belong to the same type of fresh corn, they are controlled by different genetic loci. After crossin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04
Inventor 戴惠学胡俏强陈舜权潘玖琴
Owner NANJING INST OF VEGETABLE SCI
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