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Breeding method for increasing rice filling speed

A speed, rice technology, applied in the breeding field to speed up the grain filling speed of rice, can solve the problems of poor quality, limited improvement range, poor filling degree, etc., and achieve the effect of improving the filling speed and speeding up the filling speed.

Pending Publication Date: 2019-04-12
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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Problems solved by technology

But in general, these breeding methods can only improve the grain filling speed for varieties with a thousand-grain weight of about 25 grams, while for varieties with a thousand-grain weight over 30 grams, the improvement is limited due to the limitation of the grain filling speed.
[0003] The existing large-grain variety SLG-1 has a thousand-grain weight of up to 40 grams. Due to the slow filling speed, the filling degree is poor, and the quality is not good

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  • Breeding method for increasing rice filling speed
  • Breeding method for increasing rice filling speed
  • Breeding method for increasing rice filling speed

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Embodiment Construction

[0014] The present invention is described in further detail now in conjunction with accompanying drawing.

[0015] figure 1 For accelerating rice filling speed breeding flowchart of the present invention, figure 2 It is a comparison chart of SLG-1 double grain and SLG-1 (CK) grouting rate of the present invention.

[0016] as attached figure 1 As shown, in S101, Zhejing 22-Twin Ovary, which is coated with two ovaries per grain, was crossed and backcrossed with the large-grain variety SLG-1 for multiple generations, and molecular markers were used to track the twin ovary genes, and SLG-1 was bred for close Isogenic line SLG-1 double grain;

[0017] S102, plant SLG-1 double-grain and SLG-1, remove the flowers that have bloomed in each panicle in the morning of the peak flowering period after heading, remove the unopened flowers in the afternoon of the same day, and keep SLG-1 double-grain and SLG-1 has more than 5,000 grains flowering on the same day;

[0018] S103, after ...

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Abstract

The invention relates to the field of crop breeding methods, in particular to a breeding method for increasing the rice filling speed. The breeding method comprises the following steps: introducing adouble-ovary gene into a large-grain variety SLG-1 so as to convert the condition that one grain of unhusked rice of the SLG-1 coats one grain of rice into the condition that one grain of unhusked rice of the SLG-1 coats two grains of rice. Through selection of a double-grain gene different from that of the normal unhusked rice, through introduction into the large-grain variety, the rice filling characteristic is improved; and the double-grain filling rate of the SLG-1 bred by the breeding method is increased by 15.54% on average.

Description

technical field [0001] The invention relates to the field of crop breeding methods, in particular to a breeding method for accelerating rice filling speed. Background technique [0002] Paddy paddy is formed by the two edges of the inner and outer palea interlocking to form a closed chaff, which is covered with a grain of brown rice. The size of lemma and lemma play an important role in grain formation. On the one hand, they synthesize assimilates, and on the other hand, they shape the grain, affecting the grain shape and filling degree of rice. Rice filling rate is an important evaluation index that affects the fullness and maturity of rice. The development and changes of rice in my country have experienced several major changes, mainly focusing on plant type and panicle type. The rice varieties bred in the 1950s are all high-stalk varieties, with weak tillering ability, loose plant type, poor lodging resistance, poor rice filling, low yield, and long maturity period; the...

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Application Information

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IPC IPC(8): A01H1/02
CPCA01H1/02
Inventor 叶胜海张小明翟荣荣朱国富叶靖陆艳婷
Owner ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES