Special Issue "Plants Heterosis"

A special issue of Plants (ISSN 2223-7747).

Deadline for manuscript submissions: 15 December 2019.

Special Issue Editors

Guest Editor
Dr. Ornella Calderini

Institute of Biosciences and Bioresources, National Research Council of Italy, Italy
Website | E-Mail
Interests: Plant cell cycle and meiosis; Plant development and reproduction; Signal transduction via MAPK genes related to development and stress responses; Plant functional genomics in model (Arabidopsis and Medicago truncatula) and crop species; Bioenergy crops; Biodiversity; Heterosis
Guest Editor
Dr. Carla Scotti

Council for Agricultural Research and Economics (CREA), Rome, Italy
Website | E-Mail
Interests: methods in alfalfa variety constitution (synthetics and free-hybrids) and breeding for forage production and quality in alfalfa; secondary metabolite synthesis in Medicago spp.: symbiotic nitrogen fixation in Medicago spp. – Sinorhizobium meliloti; functional genomics in Medicago spp.

Special Issue Information

Dear Colleagues,

The phenomenon of heterosis was first described by Darwin as having a positive effect on plant traits, as displayed by cross-fertilized over self-fertilized progenies in the vegetable kingdom. Shull and East’s rediscovery of heterosis in 1906 paved the way for the introduction of the first maize hybrid varieties in the US market in early 1930. Since then the occurrence of hybrid vigor has been proven for many plant species (allogamous and autogamous) and for several characteristics (biomass and resistance to biotic and abiotic stress).

Genetic control studies on hybrid vigor support the different hypotheses that have been suggested and debated (dominance, over-dominance, epistasis) and, in general, it is accepted that the three mechanisms are not mutually exclusive.

The advances in dissecting the molecular mechanisms underlying heterosis seem to indicate that new patterns of whole-genome coordinated activities differently modulated in the various sets of genes (e.g. syntenic/non-syntenic, dosage-dependent genes), plant tissues, developmental stages, and in timing (e.g., altered circadian-mediated gene expression) are involved in the higher performances of heterotic hybrids vs the parental lines. These new patterns of genome activity in hybrids can be the result of multiple molecular mechanisms documented in several recent studies: gene expression variation (differential/non-differential variation relative to the parental lines; additive/non-additive variation; cis- and trans-acting regulatory variation of parental alleles), gene complementation (from presence/absence variation and active/non-active variation between parents), epigenetic regulation (e.g., DNA methylation).

The effort to tackle heterosis from the genetic, epigenetic, and molecular point of view, seems to have led to a more and more complex depiction of heterosis itself, hampering a generalized scientific theory to thoroughly cover the phenomenon. On the other hand, plant breeders keep on working successfully with breeding schemes in many crops and vegetables estimating parental genotype ‘combining abilities’ to catch the best ‘well combining’ parental lines and consequently the most heterotic hybrids. It is then clear that the genetic, epigenetic, and molecular dissection of the ‘well combining’ genotypes is also of great interest in the view of establishing a consistent heterotic pattern (i.e., groups of parental lines consistently displaying heterosis in hybrids) in different plant species.

For these purposes, the current Special Issue welcomes experimental work, reviews, commentaires on phenotypic, genetic, and molecular analysis of hybrid vigor in plants, with a particular focus on non-model species, as a means to offer a wide frame for discussing the recent progress in the field.

Dr. Ornella Calderini
Dr. Carla Scotti
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Plants is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1200 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Published Papers

This special issue is now open for submission.
Plants EISSN 2223-7747 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top