Sterilization type cross breeding method for corn seeds

A hybrid and corn technology, applied in the direction of botany equipment and methods, applications, plant genetic improvement, etc., can solve the problems of untimely detasseling of the female parent in the seed production field, produce inferior seeds, and it is difficult to do so, so as to save nutrients , high seed production yield, the effect of ensuring purity and quality

Inactive Publication Date: 2005-11-09
河北冀南种业有限公司
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Problems solved by technology

There are many measures to ensure the purity and high quality of corn hybrid seeds. The most critical measure is to do a good job in field seed production. Only before the female parent in the field is tasseled and powdered, the tassels are pulled out in a timely, clean and thorough manner. Only by strictly preventing self-pollination and sister cross-pollination of the female parent plant can we obtain seeds with high purity and high quality, but in fact, due to various factors such as weather, manpower, and sense of responsibility, it is difficult to achieve
Therefore, often due to the untimely and incomplete detasseling of the female parent in the planting field, inferior seeds are produced, resulting in a serious reduction in production, and seed disputes caused by this occur from time to time

Method used

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  • Sterilization type cross breeding method for corn seeds
  • Sterilization type cross breeding method for corn seeds

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Embodiment Construction

[0018] The method of the present invention is described in conjunction with specific embodiments.

[0019] (1) Transgenesis of Es Yong 31257: see figure 1 , in the summer of 2000, the C-type Es subspecies inbred line C53 was used as the female parent, and Yong 31257 was used as the male parent to form a C53×Yong 31257 single-cross combination, and the hybrid first generation (F 1 ) seeds, male sterile plants were selected at the stage of tasseling and pollination, and Yong 31257 was used as the male parent for backcrossing, and the obtained backcrossing F 1 The seeds were sown in the summer of 2001, and the sterile plants were selected for backcrossing with Yong 31257, and backcrossed 5 times in a row to produce Es Yong 31257;

[0020] (2) Hybrid identification and screening of the restorer line Yong 314-3: In the winter of 2000 in Hainan, the C-type Es subspecies C53×Yong 92614 single cross was used as the female parent, and Yong 314-3 was used as the male parent (mixed poll...

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Abstract

A method for preparing the seeds of sterilized hybrid corn Yongyu No.2 includes such steps as preparing the male sterile Yong-31257 from the Yong-31257, preparing the restorer Yong-314-3 from the Yong-314-3, and hybridizing between them. It features that other corn can not be planted in the 500-m range around the seed-preparing field, the row ratio of female parent to male one is (4-6):1, and the female parent is sowed before the male one.

Description

technical field [0001] The invention belongs to the technical field of utilization of sterile corn hybrids, and in particular relates to a C-type corn male sterile line, a C-type corn restorer line and a seed production method for the sterile hybrids thereof. Background technique [0002] Production practice shows that in order to give full play to the yield-increasing effect of a certain corn hybrid, it must have its pure and high-quality seeds for production and utilization. There are many measures to ensure the purity and high quality of corn hybrid seeds. The most critical measure is to do a good job in field seed production. Only before the female parent in the field is tasseled and powdered, the tassels are pulled out in a timely, clean and thorough manner. Only by strictly preventing self-pollination and sister cross-pollination of the female parent plant can we obtain seeds with high purity and high quality, but in fact it is difficult to do so due to various factors...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02
Inventor 崔绍平
Owner 河北冀南种业有限公司
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