Method for identifying high-temperature-resistant rice and application of method in breeding

An identification method and high-temperature-resistant technology, which can be applied in fields such as application, rice cultivation, and horticultural methods, can solve problems such as failure to obtain identification results, inconsistent heading and flowering periods of test varieties, and difficulties in meeting high-temperature weather conditions, etc. It is easy to achieve the effect , the effect of the effect evaluation

Active Publication Date: 2017-08-18
HUNAN RICE RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional staged sowing in the field is under completely natural conditions, and the high-temperature weather conditions required for the test are often difficult to meet, or there is no high

Method used

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  • Method for identifying high-temperature-resistant rice and application of method in breeding
  • Method for identifying high-temperature-resistant rice and application of method in breeding
  • Method for identifying high-temperature-resistant rice and application of method in breeding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1 Identification of high temperature resistance characteristics of some mid-season rice varieties in Hunan in 2013

[0036] The late rice varieties to be identified this time are Longliangyou 981, Y Liangyou 1, Y Liangyou 1176, Yueyou 888, Liangyou 3568, Xiangyou 99, Gaoyou 7, Gaoyou 8, a total of 8 Hunan Medium rice variety.

[0037] Selected control variety: Shanyou 63 was selected as the high temperature resistant control variety.

[0038] Scientific stage sowing and seedling raising: There are 8 stages of sowing, starting from April 15, sowing every 5 days, see Table 3. On the same day, 8 rice varieties to be identified and Shanyou 63 were sown, and conventional water seedling management was adopted.

[0039] Table 3 Stage sowing schedule

[0040]

[0041] Reasonable planting specifications and density: 5 rows for each variety, 20 rows for each row, a total of 100 rows, and a density of 20cm×20cm. Protective rows are set up around, and seedlings are t...

Embodiment 2

[0049] Example 2 Identification of high temperature resistance characteristics of some middle-season rice test materials in Hunan in 2014

[0050] The late rice varieties to be identified this time are Chuang 1, Chuang 2, Chuang 3, Chuang 4, Chuang 5, Chuang 6, Chuang 7, Chuang 8, and Y Liangyou 1, a total of 9 Hunan mid-season rice new materials.

[0051] Selected control variety: Shanyou 63 was selected as the high temperature resistant control variety.

[0052] Scientific staged sowing and seedling raising: it is divided into 8 stages of sowing, starting from April 15th, sowing every 5 days, and the sowing date arrangement is the same as Table 3 in Example 1. On the same day, 8 rice varieties to be identified and Shanyou 63 were sown, and conventional water seedling management was adopted.

[0053] Reasonable planting specifications and density: 5 rows for each variety, 20 rows for each row, a total of 100 rows, and a density of 20cm×20cm. Protective rows are set up aroun...

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Abstract

The invention relates to a crop identification method and in particular relates to a method for identifying high-temperature-resistant rice. The method comprises the following steps: seeding to-be-identified rice varieties and high-temperature-resistant control varieties at each phase, seeding and raising rice seedlings in phases, and planting in a large field; judging that the to-be-identified varieties have weak tolerance on high temperature if a bigger fluctuation occurs at the initial heading stage, the full heading stage and the maturation stage of each variety in each phase, otherwise selecting a judgment method according to whether encountering extreme high-temperature weather; if all the varieties have initial heading in any phase during the extreme high-temperature weather, selecting 20 available spikes during the initial heading on that day in the phase of each variety encountering the extreme high-temperature weather, testing the seeds when the rice basically has yellow ripeness, and evaluating according to the setting percentage and comparison with control; selecting five roots of available spikes in each seeding period of each variety for performing indoor seed testing if not encountering the extreme weather; recording the maximum value, the minimum value and the mean value, and evaluating by taking the values as the basis. The method for identifying high-temperature-resistant rice disclosed by the invention scientifically selects an evaluation criterion and is suitable for high-temperature-resistant identification of lots of varieties.

Description

technical field [0001] The invention relates to a crop identification method, in particular to an identification method of high temperature resistant rice and its application in breeding. Background technique [0002] Rice is one of the most important food crops in China, but with the improvement of production conditions and the increase of production level, climatic factors, especially high temperature, have more and more influence on rice production. Previous studies have shown that high temperature damage to rice mainly occurs during the flowering period. High temperatures above 35°C can cause stunted flower organ development and pollination behavior disorders, including hindering anther cracking, pollen germination, and pollen tube elongation, resulting in a significant reduction in seed setting rate and a substantial reduction in rice yield. . Abnormal high temperature frequently endangers rice fruiting, which has aroused the attention of all parties. Faced with the u...

Claims

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Application Information

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IPC IPC(8): A01G16/00A01G7/00A01H1/04A01G22/22
CPCA01G7/00A01H1/04A01G22/22
Inventor 闵军黎用朝
Owner HUNAN RICE RES INST
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