Research Progress on Genetic Mechanism of Twin-embryo in Maize

doi:10.11924/j.issn.1000-6850.casb2024-0182

Abstract

Abstract:

High yield has always been a research hotspot in maize breeding, and the traditional way of improving maize yield has entered the bottleneck period. The special genetic phenomenon of maize twin-embryo may provide a breakthrough direction for obtaining high yield. In order to understand the genetic mechanism of the phenomenon of twin-embryo, this paper summarized the previous studies on the phenomenon of twin-embryo and polyembryony, including maize and other crops, and integrated the related genetic expression, cytological observation, physiological and biochemical characteristics, molecular mechanism and other contents from multiple dimensions. In addition, this paper summarized some research methods of twin-embryo, to provide feasibility reference for the molecular genetic mechanism of twin-embryo traits and high-yield breeding in maize. Through previous studies, this paper found that there was no breakthrough in gene mining of twin-embryo in maize. Therefore, it is predicted that the focus of research on twin-embryo phenomenon is still the mapping of key genetic loci affecting the expression of twin-embryo traits and the mining of candidate genes, so as to further analyze the molecular network mechanism of twin-embryo phenomenon in maize and provide theoretical support for guiding maize breeding with high yield.

Key words: maize, twin-embryo phenomenon, high yield, genetic loci, twin-embryo gene, molecular mechanism, high-yield breeding

GAO Jing, QIN Mengfan, LI Kun, LI Wu. Research Progress on Genetic Mechanism of Twin-embryo in Maize[J]. Chinese Agricultural Science Bulletin, 2024, 40(29): 1-7.

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