Long-spike neck sterile line selection and breeding method

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 ...

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