Field selection method for indica hybrid rice ideal strain type at the middle and lower reaches of Changjiang River

A field selection, mid-stream and downstream technology, applied in botany equipment and methods, plant genetic improvement, angiosperms/flowering plants, etc., can solve the problems that there are no similar patents, etc., and achieve the effect of easy to show effectiveness and practicality

Inactive Publication Date: 2008-12-10
JIANGSU LIXIAHE REGION AGRI RES INST
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  • Abstract
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  • Claims
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  • Field selection method for indica hybrid rice ideal strain type at the middle and lower reaches of Changjiang River
  • Field selection method for indica hybrid rice ideal strain type at the middle and lower reaches of Changjiang River
  • Field selection method for indica hybrid rice ideal strain type at the middle and lower reaches of Changjiang River

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Experimental program
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Effect test

Embodiment 1

[0045] According to the selection method of the present invention, with Yangdao No. 4 as the female parent and 3021 as the male parent, its F 1 Alternatives 60 Co-γ irradiation, during the period of grain yellow ripening, at M 2 Among more than 5,000 individual plants, 56 excellent plants were selected according to the individual plant selection criteria. m 3 Fifty-six strains were subplanted, and 9 strains were selected according to the population plant selection standard, from which 49 excellent plants were selected according to the individual plant selection standard. m 4 49 strains were planted, and 6 excellent strains were selected according to the population plant selection standard, from which 35 excellent plants were selected according to the individual plant selection standard. Repeat to M 9 13 excellent individual plants were selected, M 10The population traits, yield performance and resistance identification of 13 strains were carried out in generations, and t...

Embodiment 2

[0095] According to the selection method of the present invention, 226 mutant individual plants were selected according to the individual plant selection criteria during the grouting and fruiting period from the large population of more than 100,000 plants of the Sri Lankan rice variety BG90-2; 40 excellent individual plants were screened out. In the following year, 40 strains were planted, and the strains were compared according to the population plant selection standard, and 11 strains were selected through manual identification of bacterial blight, rice blast disease, and natural identification of rice planthopper; Selection criteria, select 100 excellent individual plants. In the third year, 100 lines were planted, and 35 excellent lines were selected according to the population plant selection criteria and resistance identification. In the fourth year, the population traits, yield performance and resistance identification of 35 strains were carried out, and the finalized ...

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Abstract

The invention discloses a field selection method for ideal plant types of New Indic Rice in the rice areas of the middle and lower reaches of the Yangtze River. According to the ecological characteristics of the growing seasons of the rice in the middle and lower reaches of the Yangtze River, a selection mode and a field selection index are provided for the plant types of one-season Indic rice grains during the yellow maturity period. The key point of the invention is that a selection with three-high: high growing quantity, high storage quantity and high filling degree is established; according to the three-high mode, quantitative selection indexes for the individual and group plants are established. The individual selection indexes are shown as follows: big, erecting, sparse, solid, excellence and resistance; the selection indexes for the group plants are presented as follows; enough, strong, penetration, elegant and standing. When the single plant is selected, the comprehensive property is investigated; meanwhile, the behavior of individual plant in the group is also investigated; when the group plant is selected, the group structure is investigated and the single plant property is investigated at the same time. Individual plants are selected out of excellent group plants and the group plant is established by excellent individual plants; the process is repeatedly promoted to all seed raising generations, thus improving the selection effect. The improvement of single property is developed to the establishment of the comprehensive property; the qualitative analysis of configuration is developed as quantitative selection of the plant factors; the pure configuration design is developed as the improvement of comprehensive function, thus establishing the frame for the comprehensive selection of the ideal plant type of the New Indic Rice.

Description

technical field [0001] The invention relates to a rice breeding method, in particular to an indica rice breeding selection method in the middle and lower reaches of the Yangtze River. Background technique [0002] Since Australian scholar C.M.Donald proposed the concept of crop ideal plant type in 1968, breeders at home and abroad have conducted research around this important topic and proposed a variety of ideal plant type models. [0003] Khush of the International Rice Research Institute proposed the "less tiller, large spike" model, the main features are: few tillers (4-6), large spikes, high spike rate, less dark green leaves, well-developed root system, etc. [0004] Huang Yaoxiang of Guangdong Academy of Agricultural Sciences proposed the "clustered early growth" model, focusing on the study of plant type in the early stage of rice growth, early growth and fast growth, and the accumulation of material foundation for later growth. The designed plant type model is 105-1...

Claims

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Application Information

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IPC IPC(8): A01H1/04A01H5/00
Inventor 张洪熙戴正元黄年生周长海赵步洪李爱宏刘广青谭长乐王宝和顾文元刘晓斌朱兆兵潘存红季红娟李育红张小祥余玲
Owner JIANGSU LIXIAHE REGION AGRI RES INST
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