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Method for detecting high-temperature stability of photosynthetic capacity of paddy rice

A high-temperature stability and detection method technology, applied in rice cultivation, horticultural methods, botany equipment and methods, etc.

Inactive Publication Date: 2009-11-25
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no simple and applicable method for evaluating the high-temperature stability of rice photosynthesis

Method used

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  • Method for detecting high-temperature stability of photosynthetic capacity of paddy rice
  • Method for detecting high-temperature stability of photosynthetic capacity of paddy rice
  • Method for detecting high-temperature stability of photosynthetic capacity of paddy rice

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030]Determination of High Temperature Stability of Photosynthetic Ability at Heading Stage of 8 Rice Materials under Natural Conditions

[0031] More than 30 different types of indica rice restorer lines and sterile line varieties representative in production were selected as test materials. After 2 years of identification, the rice breeding material "Shu "Hui 527" (source: a variety bred by Sichuan Agricultural University), and "Peiai 64S" (a variety bred by Hunan Longping High-tech Agricultural High-tech Co., Ltd.), among which the materials with poor high-temperature photosynthetic stability have "special Indica Zhan 25" (source: bred by Foshan Institute of Agricultural Sciences, Guangdong Province), "Gui 99" (provided by Guangxi Academy of Agricultural Sciences). The 2-year results of the difference between different materials tend to be consistent, and the repeatability is good.

[0032] Select 8 materials that are divided into one group for measurement as an example t...

Embodiment 2

[0042] Embodiment 2 (application embodiment):

[0043] For two materials "Shuhui 527" and "Teixianzhan 25" with large differences in photosynthetic stability under natural high temperature conditions, the starting point temperature of photosynthetic decline was identified under artificial light and temperature conditions.

[0044] (1) 2 parts of materials were sown on May 10, 2007, and transplanted into pots on June 5, with 6 plants in total in 2 pots of each material.

[0045] (2) Measure the chlorophyll SPAD value of the flag leaf of the main stem on August 10, and select 3 fixed plants for each material as the photosynthesis test plants.

[0046] (3) Set the changing temperature from 28°C to 38°C in the large-scale artificial light-temperature plant growth chamber, and the temperature between the two temperature setting points will rise at an average speed. The light intensity of 20000Lx remains unchanged.

[0047] Table 2. The temperature setting of the internal combusti...

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Abstract

The invention belongs to the technical field of crop breeding, specifically relates to a method for sieving high-temperature adaptive resources of paddy rice and for evaluating and authenticating high-temperature stability of photosynthetic capacity of breeding material. The invention comprises the characteristics of: adjustment for the heading stage of the material to be authenticated via seeding period, selection for natural conditions of photosynthetic rate determination, confirmation for growth period and determination time of paddy rice, setting of parameter values of artificial light and temperature, processing and analysis of data and the like. During the specific period for growth and development of the paddy rice, conditions including natural high temperature in summer and artificial light and temperature are utilized to implement definite-time and constant-temperature determination on net photosynthetic rate of paddy rice leaf, and the obtained result can relatively accurately analyze differences of photosynthesis among testing varieties of the paddy rice in high-temperature stability. The invention provides convenient and feasible evaluation indicators and methods for the selection of parent and the sieving of breeding progeny in high-temperature adaptive ecological breeding and in high photosynthetic efficiency physiological breeding.

Description

technical field [0001] The invention belongs to the technical field of breeding of new varieties of crops, and is related to crop physiology and crop ecology. The invention relates to a method for testing and analyzing related technical indicators of rice ecological breeding, in particular, to a method for testing the photosynthetic ability of rice breeding materials. Test method for high temperature stability. Background technique [0002] Rice is the main food crop in the world. The use of rice dwarf gene resources and heterosis has made continuous breakthroughs in rice yield, but the light energy utilization rate of cultivated rice is still low. It can be improved by improving the photosynthesis efficiency of rice. Rice production still has great potential. Due to the continuous growth of my country's population, the continuous decrease of per capita arable land area and the shortage of water resources, it is difficult to increase the rice planting area to meet my countr...

Claims

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Application Information

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IPC IPC(8): A01G16/00A01G7/00A01G22/22
Inventor 曾汉来吴艳洪李海霞董红霞张端品
Owner HUAZHONG AGRI UNIV
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