A method for aggregate breeding of rice varieties with good taste and blast resistance

A technology of rice blast resistance and aggregation breeding, which is applied in the fields of botany equipment and methods, biochemical equipment and methods, plant gene improvement, etc., can solve the problems of time-consuming and labor-intensive, long breeding period, etc., and achieve improved selection efficiency, sticky and soft texture , good taste effect

Active Publication Date: 2017-12-26
JIANGSU ACAD OF AGRI SCI
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Problems solved by technology

However, this method will not only be affected by factors such as plant growth and development stage and environmental conditions in the process of offspring selection, but also has many problems in the gene aggregation of multiple excellent traits, which is time-consuming and laborious, and the required breeding period is relatively long. long

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  • A method for aggregate breeding of rice varieties with good taste and blast resistance
  • A method for aggregate breeding of rice varieties with good taste and blast resistance
  • A method for aggregate breeding of rice varieties with good taste and blast resistance

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Embodiment 1

[0031] A method for aggregation breeding of rice varieties with good taste and rice blast, comprising the following steps:

[0032] 1) Select parents: Kanto 194, a high-quality japonica rice variety with excellent taste and resistance to stripe leaf blight (introduced from Japan), bred in Ibaraki Prefecture, Japan, registered by the Ministry of Agriculture, Forestry and Fisheries in 2003, and the registered name is No. 387. Good taste, dark endosperm genotype Wx-mqWx-mq, rice blast genotypes pi-tapi-ta, pi-bpi-b. This variety has a full growth period of 130-135 days, a plant height of 85-95cm, 6-8 effective panicles per plant, 100-110 grains per panicle, a seed setting rate of 93%-95%, and a thousand-grain weight of 24-25g.

[0033] Wujing 13 (formerly known as Wuyu 5021), a high-yielding japonica rice variety from Jiangsu, was bred by the Rice and Wheat Breeding Farm in Wujin District, Changzhou City, Jiangsu Province, and was approved and named in 2003. The genotype at the ...

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Abstract

The invention discloses a polymerization breeding method for rice varieties with good taste and resistance to blast disease. Wujing 13 and Kanto 194 are selected for cross-breeding; then F1 and Wujing 15 are used for recrossing, F2 and F3 generation single plants are mixed, and the It carried out molecular marker-assisted selection of dark endosperm mutant gene and rice blast resistance gene, and obtained three genes with dark endosperm mutant genotype Wx‑mqWx‑mq and rice blast resistance genotype Pi‑taPi‑ta and Pi‑bPi‑b. Gene homozygosity; Subsequent generations were selected for yield and agronomic traits, until the F7 generation was selected to produce high-yielding rice with stable and consistent agronomic traits, good taste, and resistance to rice blast. The rice not only has high yield, but is also resistant to rice blast and stripe leaf blight, combines the flexibility of glutinous rice and the elasticity of japonica rice, and has excellent eating quality. Application prospect.

Description

technical field [0001] The invention belongs to the field of rice genetic improvement and biotechnology application, and relates to a polymerization breeding method for rice varieties with good taste and resistance to rice blast. Background technique [0002] At the end of the 20th century, my country began to attach importance to the development of high-quality rice, and high-quality rice has become the primary goal of national japonica rice breeding (Wang Cailin et al., Journal of Jiangsu Agricultural Science, 2008, 24(2):199-203). But at that time, breeders mainly paid attention to the improvement of appearance quality, but little progress was made in the improvement of eating quality. Taking rice varieties in Jiangsu as an example, from 2001 to 2009, a total of 89 new varieties (combinations) of high-quality japonica rice above the national standard level 3 were cultivated. But the eating quality of most varieties can't meet the needs of consumers, and there is a lack o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01H1/02A01H1/04C12Q1/68
CPCA01H1/02A01H1/04C12Q1/6895C12Q2600/156C12Q2600/16
Inventor 姚姝张亚东陈涛赵庆勇朱镇周丽慧赵凌王才林
Owner JIANGSU ACAD OF AGRI SCI
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