Molecular marker for identifying fertility of hybrid progeny of common wild rice and cultivated rice and application of molecular marker

Abstract

The invention discloses a molecular marker for identifying fertility of hybrid progeny of common wild rice and cultivated rice and an application of the molecular marker. The rice molecular marker isnucleotide, corresponding to the 2099th position in sequence 1 of a sequence table, in a rice genome, namely, T or C. Experiments prove that the rice molecular marker is related to fertility of distant hybrid progeny of rice, especially fertility of female gametes; in the hybrid progeny of the common wild rice and the cultivated rice, fertility of TT genotype rice with the rice fertility molecularmarkers in two chromosomes being both T and fertility of TC genotype rice with the rice fertility molecular markers being T in one chromosome and C in the other chromosome are lower than the fertility of CC genotype rice with the rice fertility molecular markers in two chromosomes being both C; the female gametes of the TT genotype rice and the TC genotype rice develop abnormally, while female gametes and male gametes of the CC genotype rice develop normally. Therefore, the molecular marker can be used for detecting the fertility of the distance hybrid progeny of the rice, especially the fertility of the female gametes.

Description

technical field [0001] The invention relates to a molecular marker for identifying the fertility of hybrid offspring of common wild rice and cultivated rice in the field of biotechnology and its application. Background technique [0002] Rice production accounts for about 40% of the world's total food production, and increasing rice yield per unit area is of great significance to ensuring world food security. Wild rice has rich genetic variation and contains rich genes that can improve rice yield, quality and stress resistance, and can be used as an excellent germplasm resource for cultivated rice breeding. Discovering and utilizing wild rice germplasm gene resources, and using these favorable genes in wild rice in production will help to break through the bottleneck of further improving rice yield potential. However, due to the sterility or semi-sterility of wild rice and cultivated rice hybrids and hybrid offspring, the effective use of wild rice genes is limited. Therefo...

AI Technical Summary

Problems solved by technology

However, due to the sterility or semi-sterility of wild rice and cultivated rice hybrids and hybrid offspring, the effective use of wild rice genes is limited. Therefore, it is of great significance to identify the fertility of wild rice and cultivated rice hybrids and hybrid offspring.

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