Rice variety selecting method for measuring rice root activity by utilizing chlorophyll content

A technology of chlorophyll content and root activity, applied in the direction of botany equipment and methods, application, plant gene improvement, etc., can solve the problems that cannot be used for seed selection, destruction, etc., and achieve the effect of accurate and convenient breeding

Active Publication Date: 2012-10-03
LIANYUNGANG HUAHUAI CROP BREEDING INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is also a destructive assay and cannot be used for seed selection

Method used

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  • Rice variety selecting method for measuring rice root activity by utilizing chlorophyll content
  • Rice variety selecting method for measuring rice root activity by utilizing chlorophyll content

Examples

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Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1, a kind of rice variety breeding method utilizing chlorophyll content to measure rice root activity, its steps are as follows:

[0034] (1) Select high-yield and high-quality varieties to hybridize with excellent parents or varieties that are resistant to premature aging and strong root system vitality, and harvest the first-generation hybrid seeds; at the same time, set up control varieties;

[0035] (2) Substitute second-generation hybrid seeds and plant them into second-generation hybrid populations; plant control varieties;

[0036] (3) Individual plant selection; plant control varieties at the same time; when the strains are not stable, all individual plant selection is carried out. The individual plant selection method is as follows:

[0037] a. Primary selection in the field: at the initial stage of wax ripening after the full ear of each individual plant, carry out the initial selection of field appearance resistance and mark it;

[0038] B, field ...

Embodiment 2

[0048] Embodiment 2, the selection and breeding of the new medium-japonica rice variety Lianjing No. 6, its steps are as follows:

[0049](1) Jing 4 was used as the female parent and Zhongjing 109 was used as the male parent to cross, and then the hybrid was used as the male parent and Zhendao 88 was used as the female parent to recross to obtain the first generation of hybrid hybrids;

[0050] (2) The seeds of each hybrid bag of the first generation of compound hybrids are mixed, planted in Hainan, and added to form the second generation of hybrids;

[0051] (3) Selection of individual plants of the second generation of hybrids, inspecting the leaf aging index of individual plants, and selecting individual plants with strong root system vitality;

[0052] (4) Three generations of hybrid Hainan Jiadai;

[0053] (5) The fourth generation of hybrids selects dominant individual plants, investigates the leaf aging index of individual plants, and selects individual plants with str...

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Abstract

The invention relates to a rice variety selecting method for measuring rice root activity by utilizing chlorophyll content. The method is characterized by comprising the following steps of: hybridizing a high-yield high-quality variety with excellent parents or varieties with strong anti-premature senility and root activity, and harvesting first filial generation seeds; simultaneously setting control varieties; propagating to obtain hybrid second generation seeds, and planting to obtain a hybrid second generation colony; planting the control varieties; and carrying out individual plant selection and line selection, wherein the rice root activity is judged according to chlorophyll content in the top fourth leaf. By applying the method provided by the invention, rice plants with strong rootactivity can be effectively screened; and on the basis of high yield, multiple resistance and high quality, a new line with strong root activity can be more accurately selected, and high-yield new varieties can be accurately and conveniently selected.

Description

technical field [0001] The invention relates to a method for selecting and breeding new rice varieties, in particular to a method for selecting and breeding rice varieties by using chlorophyll content to measure rice root activity. Background technique [0002] A robust and physiologically active root system is the basis for high-yield rice, and the root system has four functions: fixation, absorption, synthesis and secretion. The strong water-absorbing capacity of the root can continuously ensure the water required for photosynthesis and transpiration of the aboveground part, and ensure the growth of the aboveground part for inorganic minerals. Since many plant hormones and proteins are synthesized in the root, a root system with strong physiological vitality can ensure the robust growth of the aboveground part without premature aging. There are many factors that affect the robust growth of the root system, such as the characteristics of the variety, the amount of water an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01H1/04
Inventor 潘启民徐大勇潘长红陈庭木方兆伟秦德荣樊继伟樊宁声
Owner LIANYUNGANG HUAHUAI CROP BREEDING INST
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