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Breeding method of rice photo-thermo-sensitive genic male sterile line

A technology for photothermo-sensitive genic male sterility and rice, which is applied in the fields of botany equipment and methods, application, plant gene improvement, etc., can solve the problems of difficult distinction between true and false hybrids, difficulty in purity identification, and insufficient lodging resistance, etc. The effects of pollen dispersal, good outcrossing characteristics, and more effective spikes

Inactive Publication Date: 2012-03-28
江苏丰源种业有限公司
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  • Application Information

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Problems solved by technology

However, the existing hybrid varieties are not perfect enough, some have insufficient lodging resistance, some have loose spikes, and some have purple tips. It is difficult to distinguish true and false hybrids, and it is difficult to identify the purity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0014] (1) In the spring of 2003, in Hainan, an early-maturing mid-indica photothermosensitive genic male sterile line was selected, with dense panicle type, purple glume, compact plant type, short and robust plants, strong lodging resistance, high combining ability, and good outcrossing characteristics. Peiai 64S was used as the female parent, and it was crossed with Guangzhan 63S, an early-maturing mid-indica photothermosensitive genic male sterile line with good quality, colorless apices, and good outcrossing characteristics, and obtained F 1 43 seeds.

[0015] (2) In the summer of 2003 in Zhenjiang, the F 1 Soak the seeds to accelerate germination, sow the seeds, eliminate 3 false and inferior hybrids, and mix the remaining 17 plants.

[0016] (3) In the summer of 2004 in Zhenjiang, transplanted F 2 1096 plants, 15 individual plants were screened according to comprehensive agronomic traits, harvested in November 3 seed.

[0017] (4) In the spring of 2005 in Hainan, 7 F...

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Abstract

The invention discloses a breeding method of a rice photo-thermo-sensitive genic male sterile line, belonging to a breeding method of plant seeds. The breeding method comprises the following steps of: (1) selecting an early-ripe indica rice photo-thermo-sensitive genic male sterile line Peiai 64S as a female parent and selecting an early-ripe indica rice photo-thermo-sensitive genic male sterile line Guangzhan 63S as a male parent; hybridizing to obtain F1 seeds; and (2) soaking the F1 seeds, accelerating germination and sowing; carrying out selfing for six generations and selecting a photo-thermo-sensitive genic male sterile line target variety with dense panicle, colorless glume end, short straw and strong lodging resistance. The breeding method provided by the invention has the advantages of moderate plant distribution, short and healthy plants and strong lodging resistance, good out-crossing characteristic, and colorless leaf sheath, glume end and stigma; and according to the breeding method, the purity identification can be easily finished.

Description

technical field [0001] The invention relates to a plant seed breeding method, more specifically to a rice photothermosensitive genetic male sterile line breeding method. Background technique [0002] Rice is the largest crop in my country. Hybrid rice has high yield, wide adaptability, and is easy to cultivate. The planting area accounts for 50% of the total rice area in the country, and the output accounts for 60% of the total rice output. made a great contribution. Following the three-line hybrid rice, my country has created a high-tech two-line hybrid rice with the main content of utilizing photothermo-sensitive sterility. Compared with the three-line method of hybrid rice breeding, the two-line method of hybrid rice breeding has significant advantages: first, the combination of male sterile lines and restorer lines is free, and the probability of breeding excellent combinations is increased; Dual-purpose, it can be used for seed production under long-day high-temperatur...

Claims

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Application Information

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IPC IPC(8): A01H1/02
Inventor 龚红兵周义文盛生兰钱华飞李闯刁立平林添资景德道曾生元余波
Owner 江苏丰源种业有限公司
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