Breeding method of high-ripening-rate paddy rice

A seed-setting rate and rice technology, applied in botany equipment and methods, applications, plant genetic improvement, etc., can solve the problems of field reduction and crop failure, and achieve the effects of ensuring food security, comprehensive resistance, and extreme weather resistance

Active Publication Date: 2014-06-25
ZHENJIANG AGRI SCI INST JIANGSU HILLY AREAS
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  • Description
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  • Application Information

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Problems solved by technology

[0003] In recent years, due to the intensification of industrialization, the increase of human activities, and the influence of the greenhouse effect, the climate has gradually warmed. Because some direct-broadcast rice fields have chosen the wrong variety, and sowed too late, exceeding the safe full-heading period, there are reports of individual fields with reduced yields and no harvests, which should be paid attention to in scientific research and production.

Method used

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  • Breeding method of high-ripening-rate paddy rice
  • Breeding method of high-ripening-rate paddy rice
  • Breeding method of high-ripening-rate paddy rice

Examples

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Embodiment

[0027] In this example, Zhendao 681 (also known as Zhendao No. 18), a new japonica rice line (species) with high quality, high yield and strong disease resistance, was selected in Jurong, a rice variety bred by Zhenjiang Agricultural Science Institute in the hilly area of ​​Jiangsu. Sales in large quantities, or quoted from the Rice Department of Zhenjiang Institute of Agricultural Sciences in the hilly area of ​​Jiangsu) as the female parent, crossed with IRAT118 (resourced by the International Rice Institute of Singapore, high temperature tolerance), and then backcrossed with Zhendao 681; planted 336 in Jurong in the second year In the third year, it was sown in a greenhouse, and after four generations of selection and resistance identification, the bred plants were compact in shape, delicate in growth, good in yield, and high in yield. Strong lodging resistance and good quality (yield increased by about 5% compared with the current main varieties, the general seed setting ra...

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Abstract

The invention relates to a breeding method of high-ripening-rate paddy rice and belongs to the technical field of plant breeding. According to the breeding method, a parent is selected to be subjected to single or multiple cross and different ecological shuttle breeding, so that the deficiencies of low ripening rate and instability of a variety in existing production are overcome, a novel variety of paddy rice which has the characteristics of high quality, high yield and multiple resistance and is resistant to high temperature and low temperature is bred, and current agricultural production requirements are well met.

Description

technical field [0001] The invention relates to a breeding method for crops, in particular to a rice breeding method, and belongs to the technical field of plant breeding. Background technique [0002] Rice high temperature heat damage generally refers to the period of rice budding-heading and flowering, that is, 10 days before and after heading is the most sensitive period to temperature, the most suitable temperature is 25-30°C, the daily average is higher than 30°C and Below 18°C ​​will have adverse effects. In production, the daily average temperature is usually higher than 30°C, and the daily maximum temperature is higher than 35°C as the index of heat damage during the heading and flowering stage. If the booting stage encounters continuous high temperature above 35°C, the rice flower organs will be underdeveloped. The poor pollen development and decreased vitality will affect the loose pollen and elongation of the pollen tube, resulting in the failure of pollination a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04
Inventor 景德道钱华飞张小明盛生兰林添资余波龚红兵李闯曾生元周义文曹红王克明
Owner ZHENJIANG AGRI SCI INST JIANGSU HILLY AREAS
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