A kind of breeding method of high-iron rice with resistance to diseases and insect pests

Abstract

The invention discloses a breeding method of high-iron disease and pest resistant rice. The method comprises the following steps: hybridizing disease resistant rice adopted as a parent I and rice planthopper-resistant rice adopted as a parent II to obtain a single cross F1 generation; hybridizing the single cross F1 generation with rice having the iron content of 15 mg / kg or more, adopted as a parent III, to obtain a triple cross F1 generation; plating the triple cross F1 generation to construct a doubled haploid population; planting a DH1 generation, extracting DNA, selecting lines containing a disease resistant gene, and selecting the lines for making the iron content of polished rice be 15 mg / kg or more from the lines; planting a DH2 generation, and selecting japonica-clinous rice lines; and planting a DH4 generation, and selecting disease and pest resistant japonica-clinous constant lines for making the iron content of the polished rice be 15 mg / kg or more in order to obtain the high-iron disease and pest resistant rice. The rice specie bred in the invention integrates the excellent characteristics of high iron, disease resistance and pest resistance, has a lower pesticide residual than the parent, and has high content of iron and other mineral nutrients.

Description

technical field [0001] The invention relates to the technical field of rice breeding, in particular to a method for breeding high-iron, disease-pest-resistant rice. Background technique [0002] Iron is an essential trace element for the human body. It combines with hemoglobin, myoglobin, cytochrome and other iron-containing enzymes, participates in the transport and exchange of oxygen and carbon dioxide in the body, and plays an important role in tissue respiration and biological oxidation. effect. [0003] Iron deficiency can lead to iron deficiency anemia and adverse pregnancy, including increased maternal and child mortality, affect the baby's mental development, reduce immune function, increase fatigue and reduce work efficiency. According to the World Health Organization, nearly 3.7 billion people in the world are iron deficient, and 2 billion of them suffer from iron deficiency anemia. 40% of nulliparous women and 50% of pregnant women suffer from iron deficiency an...

AI Technical Summary

Problems solved by technology

[0003] Iron deficiency can lead to the occurrence of iron deficiency anemia and adverse pregnancy, including increased maternal and child mortality, affect the baby's mental development, reduce immune function, increase fatigue and reduce work efficiency, etc.

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