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Dear Colleagues,

With the continuous progress of biotechnology, rapid development has been seen in molecular genetics and breeding theories, methods, as well as the creation of excellent germplasms. In order to promote academic exchange on the latest trends and achievements of molecular genetics and breeding in crops, this Special Issue will focus on molecular genetics and breeding mechanisms in crops with the aim of promoting the joint discussion of the latest research dynamics and directions and find opportunities for collaboration in this field. All original research papers and reviews are welcome for submission to this Special Issue.

Contributions in this Special Issue may include: studies on biological and abiotic stress resistance of crops, advances in crop genomics and proteomics, strategies for the combination of crop molecular breeding and conventional breeding, the and research and development of new technologies for crop germplasm innovation.

Prof. Dr. Shaozhen He
Guest Editor

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Research

Open AccessArticle

Genome-Wide Identification and Expression Analysis of the Sucrose Synthase Gene Family in Sweet Potato and Its Two Diploid Relatives

and

Int. J. Mol. Sci. 2023, 24(15), 12493; https://doi.org/10.3390/ijms241512493 - 06 Aug 2023

Viewed by 679

Abstract

Sucrose synthases (SUS; EC 2.4.1.13) encoded by a small multigene family are the central system of sucrose metabolism and have important implications for carbon allocation and energy conservation in nonphotosynthetic cells of plants. Though the SUS family genes (SUSs) have been identified in several plants, they have not been explored in sweet potato. In this research, nine, seven and seven SUSs were identified in the cultivated sweet potato (Ipomoea batatas, 2n = 6x = 90) as well as its two diploid wild relatives I. trifida (2n = 2x = 30) and I. triloba (2n = 2x = 30), respectively, and divided into three subgroups according to their phylogenetic relationships. Their protein physicochemical properties, chromosomal localization, phylogenetic relationship, gene structure, promoter cis-elements, protein interaction network and expression patterns were systematically analyzed. The results indicated that the SUS gene family underwent segmental and tandem duplications during its evolution. The SUSs were highly expressed in sink organs. The IbSUSs especially IbSUS2, IbSUS5 and IbSUS7 might play vital roles in storage root development and starch biosynthesis. The SUSs could also respond to drought and salt stress responses and take part in hormone crosstalk. This work provides new insights for further understanding the functions of SUSs and candidate genes for improving yield, starch content, and abiotic stress tolerance in sweet potatoes. Full article

(This article belongs to the Special Issue Molecular Genetics and Breeding Mechanisms in Crops 2.0)

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