Method for evaluating rice seedling stage cold resistance based on principal component analysis

A principal component analysis and evaluation method technology, applied in the field of crop genetics and breeding, can solve problems such as the inability to accurately identify the cold resistance of rice seedlings

Pending Publication Date: 2021-04-09
SHENYANG NORMAL UNIV
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Problems solved by technology

However, cold tolerance is a quantitative trait determined by multiple factors. Only one or a few evalu...

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  • Method for evaluating rice seedling stage cold resistance based on principal component analysis
  • Method for evaluating rice seedling stage cold resistance based on principal component analysis
  • Method for evaluating rice seedling stage cold resistance based on principal component analysis

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Embodiment Construction

[0047] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of systems consistent with aspects of the invention as recited in the appended claims.

[0048]The impact of adversity stress on plants is closely related to various factors such as stress type, stress intensity, and duration, and is related to plant species. Low temperature stress will have an impact on the external morphological characteristics and physiological and biochemical indicators of rice. At present, previous studies have done some research on the evaluation indicators of rice seedling c...

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Abstract

The invention discloses a method for evaluating the cold resistance of rice in the seedling stage based on principal component analysis, and the method comprises the steps: adopting a principal component analysis method to comprehensively evaluate the cold resistance of rice germplasm resources in the seedling stage, wherein the correlation analysis results show that six physiological indexes and morphological indexes have negative correlation; converting seven measured single indexes into three independent comprehensive indexes through principal component analysis, wherein the cumulative contribution rate reaches 84.76%; according to the comprehensive index D value, dividing germplasm resources into five types, and screening out the four varieties with extremely high comprehensive cold resistance in the seedling stage in total; wherein the principal component and regression combined analysis results show that the seven indexes can be used as important indexes for identifying the seedling-stage cold resistance of the rice germplasm resources. The method disclosed by the invention has guiding significance for seedling-stage cold-resistant rice variety cultivation.

Description

technical field [0001] The disclosure of the invention relates to the technical field of crop genetics and breeding, in particular to a method for evaluating the cold resistance of rice seedlings based on principal component analysis. Background technique [0002] Rice is a staple food consumed by most of the world's population. According to statistics, my country's rice production accounts for about 45% of the world's total rice production, but on average every 4-5 years there will be a large-scale reduction in production due to chilling damage. Rice is a subtropical temperature-loving crop, and it will suffer from low temperature and chilling damage at all stages of growth and development. The identification and evaluation of cold resistance of rice germplasm resources is an important prerequisite and guarantee for cultivating cold-resistant rice varieties. is of great significance. [0003] At present, researchers have done a lot of work on the selection of cold-resista...

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Application Information

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IPC IPC(8): G06Q50/02G06Q10/06
CPCG06Q50/02G06Q10/06393
Inventor 逄洪波郑晓明李玥莹吴隆坤刘宏鑫赵宗耀职铭阳程露
Owner SHENYANG NORMAL UNIV
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