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Method for breeding new variety of maize

A new variety of corn technology, applied in the field of obtaining new plants, can solve the problems of difficult emergence, dry seeds, poor agronomic traits, etc., and achieve the effect of avoiding adverse interactions

Inactive Publication Date: 2002-09-18
南宁市桂福园农业有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the multi-recessive gene homozygous hybrids obtained by traditional maize hybrid breeding also show some unfavorable agronomic traits, such as susush 2 sh 2 Seeds of hybrids are shriveled and difficult to emerge after sowing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The maize homozygous for the super sweet recessive gene and the maize homozygous for the waxy recessive gene were respectively selected as parents for crossing, and the first generation of hybrids was self-crossed or intercrossed with each other, and the homozygous double recessive gene could be obtained by selection and separation. parent material. The double recessive gene homozygous corn is then crossed with the waxy recessive gene homozygous corn, and the obtained hybrid offspring can be planted in isolation, and corn kernels with both sweet and waxy characteristics can be obtained on the same commercial ear at the same time. Therefore, the corn green food is both sweet and glutinous.

Embodiment 2

[0016] The maize homozygous single recessive gene for common sweet and the homozygous double recessive gene super sweet and waxy were respectively selected as parents for crossing, and the first generation of hybrids obtained by selfing or crossing with each other can be obtained by selection and separation Parent material with homozygosity for the triple recessive gene. The maize that is homozygous for the three recessive genes is then crossed with the maize that is homozygous for the waxy recessive gene. After isolation and planting, the obtained hybrid offspring can also have 4 kinds of seeds coexisting on the same ear of F1, and belong to sweet and waxy. Therefore, the green food is both sweet and glutinous.

Embodiment 3

[0018] The maize homozygous for the brittle recessive gene and the maize homozygous for the common sweet, super sweet and waxy three recessive genes were selected as parents for crossing. , to obtain the parent material with four recessive genes homozygous for easy crisp, normal sweet, super sweet and waxy. The maize homozygous for the four recessive genes is crossed with waxy maize, and the obtained hybrid offspring can be isolated and planted to obtain 8 types of homozygous grains, which can be planted on the same ear of F1 at the same time, and they can also be It is divided into two categories: sweet and waxy, so green food is both sweet and waxy.

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Abstract

Double-recessive gene homozygote maize grain spike of F-1 plant is selected and grow for several generations until becoming stable. Take double-recessive gene homozygote or multi-recessive gene homozygote obtained from above-mentioned process as one parent to hybridize with single-recessive or multi-recessive gene homozygote or other non-recessive gene homozygote as another parent to obtain hybridized bread for use in production. The different grains of hybridized spike contain different gene combinations, so that it shows excellent characteristics controlled by multi-gene.

Description

1. Technical field [0001] The present invention relates to methods for obtaining new plants, especially for breeding new varieties of maize. 2. Background technology [0002] There are many genes that affect the composition of maize endosperm. eg ae (increased amylose), bt (brittle-1), bt 2 (brittle-2), du (dark endosperm), fl (silty-1), sh (shrink-1), sh 2 (shrink -2), sh 4 (shrinkage -4), su (sweetness -1), su 2 (sweetness-2), se (sweetening), wx (waxy), o 2 (dark endosperm), etc. Their common feature is that only when the recessive gene is homozygous, the corresponding traits can be shown. [0003] Breeders often hope to combine multiple genes in the same variety in order to synthesize the excellent characteristics of multiple genes. For example, put su and sh 2 The two genes are combined in order to combine the advantages of normal sweet and super sweet corn to breed sweet corn varieties with higher sugar content. Another example is to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01H1/02
Inventor 吴子恺
Owner 南宁市桂福园农业有限公司
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