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Long-spike neck sterile line selection and breeding method

A long-neck, sterile line technology, applied in the field of breeding of long-neck sterile lines, can solve poor sensitivity, adverse effects on economic traits and sterility of Pei'ai 64S, and poor ear extension of Pei'ai 64S and other issues to achieve the effect of accelerating the generation process and improving breeding efficiency

Inactive Publication Date: 2006-10-11
JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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Problems solved by technology

[0007] The purpose of the present invention is to aim at the relatively poor panicle extension degree of Pei'ai 64S in the seed production practice, to GA 3 In order to solve the problem of poor sensitivity, through genetic improvement, the eui gene of 02428h was introduced into the two-line male sterile line Peiai 64S by using the backcross method to obtain the long-neck two-line male sterile line P8hS, which made the ear of Peiai 64S The extension degree has been completely improved, and it has no adverse effect on the main economic traits and sterility of Peiai 64S

Method used

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  • Long-spike neck sterile line selection and breeding method

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Embodiment Construction

[0023] In the first season of 1999 in Nanjing, the low temperature sensitive two-line male sterile line Pei'ai 64S was used as the female parent and 02428h was used as the male parent to prepare a hybrid combination. Planted F in Hainan in the winter of that year 1 (Pei'ai 64S / 02428h), and using Pei'ai 64S as the female parent and F 1 Backcross to get a B 1 f 1 (Peiai 64S / / Peiai 64S / 02428h). 2000 Season Planting B 1 f 1(Pei'ai 64S / / Pei'ai 64S / 02428h), select 13 single plants with the same leaf shape as Pei'ai 64S, that is, the plant height is 75-85cm when heading, the leaves are straight and involuted, and the pollen fertility is above 90%. As the male parent, continue to backcross with Pei'ai 64S, and backcross seed B after maturity 2 f 1 with corresponding parent B 1 f 1 The selfed seeds were harvested in pairs. B planted in pairs in Hainan in the winter of 2000 1 f 2 with B 2 f 1 . in 13 B 1 f 2 Among the 9 lines, recessive tall-stalked plants with panicle ...

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Abstract

The invention belong to the field of using the advantage of hybrid rice. It leads the long ear-neck gene eui of the masked long-stalked rice '02428h' into the biliner sterile strain by backcross, and gets the technology of breeding long-stalked biliner sterile strain. The ear-neck length is similar to that of sterile strain not containing eui gene with 450-600 grams of '920' per hectare, the iso-cross property of sterile strain is basically improved, the productivity of seed is increased and the production cost is reduced.

Description

technical field [0001] The invention relates to a breeding method for a long-neck male sterile line, which belongs to the field of rice heterosis utilization. Background technique [0002] Plasmonuclear interaction male sterility and photothermosensitive male sterility are important genetic tools successfully utilized in hybrid rice. However, since the sterility is closely related to the extension of the panicle neck, whether it is a three-line sterile line or a two-line sterile line, it is often accompanied by a serious neck wrapping phenomenon (that is, the spikelet at the base of the ear is covered by the flag leaf sheath within), seriously affecting the reproduction and seed production of sterile lines. For this reason, people have invented spray gibberellin (GA 3 , product name: 920) method and application technology, although solved the neck wrapping problem of sterile line, not only increase seed production cost, also can cause environmental pollution. [0003] In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04A01H5/10
Inventor 王才林赵凌朱镇张亚东
Owner JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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