Cultivation method of two-line black rice sterile line

Abstract

The invention discloses a cultivation method of a two-line black rice sterile line. The method comprises the following steps: hybridizing a collected black rice variety with an excellent two-line sterile line to harvest F1 generation seeds; then planting the F1 generation seeds in Changsha to obtain a hybrid F2 generation which begins to show segregation of character; selecting completely sterile plants under a high temperature climatic condition; taking the roots of the sterile plants to Hainan, and conducting winter breeding on the sterile line until fructification to obtain black seeds; planting the black seeds in Changsha, selecting completely sterile plants from a later generation with segregation of character under a high temperature climatic condition, taking the roots of the sterile plants to Hainan, conducting winter breeding, and conducting 6-8 generations of circulating breeding to obtain a stable two-line black rice sterile line; conducting fertility identification in an artificial climate chamber; conducting treatment at low temperature of 23 DEG C in a fourth stage of spike differentiation to select and cultivate a low temperature sensitive sterile line; conducting grouping and test crossing on the low temperature sensitive sterile line and other excellent black rice varieties with different genetic backgrounds; and conducting screening to obtain hybrid rice varieties with high yield, excellent quality and good resistance through an F1 generation heterosis performance evaluation.

Description

technical field [0001] The invention relates to the field of black rice breeding, in particular to a method for cultivating a two-line black rice sterile line. Background technique [0002] More than 50% of the world's population takes rice as a staple food. Due to the aggravation of environmental pollution, the pressure of life, and the accelerated pace of life, improper nutrition can cause many diseases. With the improvement of living standards, people pay more and more attention to the rationalization and nutrition of meals. Rice can provide people with rich nutrients and biologically active substances, and it is an ideal and effective way to solve various chronic diseases and nutritional imbalances in humans. Compared with ordinary rice, black rice is also richer in nutrients, and has various medicinal and nutritional health functions such as enhancing immunity, delaying aging, nourishing liver and blood, nourishing yin and kidney, warming spleen and strengthening stoma...

AI Technical Summary

Problems solved by technology

Because the cultivation characteristics of black rice are relatively poor, the plants are tall, the leaves are wide, they are not resistant to fertilizers, they are easy to lodging, and the seed setting rate is low. In addition, they mature earlier and are easy to be eaten by birds. The yield is low, and the yield per mu is only 100-200 kg. Economical Poor, high amylose content, bad taste

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