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A method for screening rice leaf sheath tolerant varieties

A leaf sheath and rice technology, which is applied in the field of screening rice leaf sheath-resistant varieties, can solve the problems of super high yield, lodging resistance, no screening process and operating procedures that limit half-height stalks and high biomass yield rice, and achieve low cost and easy operation. Convenience and wide application prospects

Active Publication Date: 2019-12-06
HUNAN HYBRID RICE RES CENT
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  • Abstract
  • Description
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Problems solved by technology

[0004] However, in the research of rice breeding and cultivation, the screening and mechanism research of leaf sheath-resistant rice varieties have not been carried out, and there is no systematic screening process and operating procedures, which limits the ultra-high yield of half-height stalk high biomass rice. , lodging resistance, so it is imminent to carry out the screening of rice leaf sheath resistant varieties

Method used

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  • A method for screening rice leaf sheath tolerant varieties
  • A method for screening rice leaf sheath tolerant varieties
  • A method for screening rice leaf sheath tolerant varieties

Examples

Experimental program
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Effect test

Embodiment 1

[0017] In 2015, a screening test was carried out on rice sheath-resistant varieties in Changsha. The selected varieties were Chaoyouqian, Y Liangyou 900, Y Liangyou 2, Y Liangyou 1, and Liangyou Peijiu, a total of 5 hybrid rice varieties.

[0018] Experimental split-plot design, the main plot is the nitrogen fertilizer application rate, and the sub-plot is different rice varieties, random block design, 3 repetitions, 10m per plot 2 . Fertilization method: The total application amount of pure nitrogen in nitrogen fertilizer is set as: 0.0, 10.0, 20.0 kg / mu, 3 treatments in total. Sufficient screening work was performed under low, medium and high nitrogen fertilizer application rates. This test does not need any compound fertilizer, only uses elemental fertilizer: urea (containing nitrogen 46%), superphosphate (containing phosphorus 12%), potassium chloride (containing potassium 60%), wherein according to mass ratio nitrogen fertilizer: phosphorus fertilizer: potash fertilizer=...

Embodiment 2

[0025] In 2016, a screening test was carried out on rice sheath-resistant varieties in Changsha. The selected varieties were Long 638S / R900, Shuangyou 1000, Xiangliangyou 2, Long 638S / P143, and Zhunliangyou 527, a total of 5 hybrid rice varieties.

[0026] Experimental split-plot design, the main plot is the nitrogen fertilizer application rate, and the sub-plot is different rice varieties, random block design, 2 repetitions, 5m per plot 2 . Fertilization method: The total application amount of pure nitrogen in nitrogen fertilizer is set as: 1.0, 8.0, 26.0 kg / mu, 3 treatments in total. Sufficient screening work was performed under low, medium and high nitrogen fertilizer application rates. This test does not need any compound fertilizer, only uses elemental fertilizer: urea (containing nitrogen 46%), superphosphate (containing phosphorus 12%), potassium chloride (containing potassium 60%), wherein according to mass ratio nitrogen fertilizer: phosphorus fertilizer: potash fert...

Embodiment 3

[0033] In 2016, a screening test was carried out on rice sheath-resistant varieties in Sanya. The selected varieties were Y Liangyou 1998, Guangliangyou 1128, Shenliangyou 1813, Y Liangyou 6, and Long 638S / R508, a total of 5 hybrid rice varieties.

[0034] Experimental split-plot design, the main plot is the nitrogen fertilizer application rate, and the sub-plot is different rice varieties, random block design, 2 repetitions, 8m per plot 2 . Fertilization method: The total application amount of pure nitrogen in nitrogen fertilizer is set as: 2.0, 12.0, 16.0 kg / mu, 3 treatments in total. Sufficient screening work was performed under low, medium and high nitrogen fertilizer application rates. This test does not need any compound fertilizer, only uses elemental fertilizer: urea (containing nitrogen 46%), superphosphate (containing phosphorus 12%), potassium chloride (containing potassium 60%), wherein according to mass ratio nitrogen fertilizer: phosphorus fertilizer: potash fer...

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Abstract

The invention discloses a method for screening rice leaf sheath ageing-resistant varieties. Under field cultivation conditions, full screening work is performed at low, medium and high nitrogen fertilizer application amount levels; split block design is performed, wherein a main block is designed for nitrogen fertilizer application, secondary blocks are designed for different rice varieties, randomized block design is repeatedly performed two or more times, and each block is greater than or equal to 5 m<2>; rice leaf sheaths are used as objects for screening in a mature phase, wherein 5-15 bags are selected from each block, and 2-5 stems are selected from each bag; statistics is conduced on the survival number of three internodal leaf sheaths of the base portion of each stem in each block, and the average value of the block sample is calculated; the total average survival number of the leaf sheaths in the blocks designed two or more times is calculated, and the varieties having large total average leaf sheath survival number at low, medium and high nitrogen fertilizer application amount levels are judged as the rice leaf sheath ageing-resistant varieties. Leaf sheath ageing-resistant plants in the rice varieties can be rapidly, conveniently and efficiently can be screened out.

Description

technical field [0001] The invention belongs to the technical field of rice variety screening, and relates to a method for screening rice leaf sheath-resistant varieties. Background technique [0002] In today's context of decreasing cultivated land area and increasing population year by year, increasing the yield per unit area of ​​rice is the key way to increase the total rice output. However, there are currently many factors affecting rice yield, among which stem lodging, premature senescence, and low material transfer will all affect yield. It has been found from previous studies that the rice leaf sheath has at least the following functions: the leaf sheath has the same photosynthetic capacity as the leaf, and can perform three functions: photosynthesis, storage and transportation of photosynthetic products, and enhancement of stem lodging resistance. It is necessary to pay attention to the study of the effect and mechanism of leaf sheath on rice yield and lodging resi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G22/22A01H1/04
CPCA01G22/22A01H1/04
Inventor 魏中伟马国辉
Owner HUNAN HYBRID RICE RES CENT