Cereal Breeding: Improving Seed Vigour Traits and Grain Quality

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

Deadline for manuscript submissions: closed (31 January 2020) | Viewed by 6883

Special Issue Editors


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Guest Editor
Council for Agricultural Research and Economics (CREA)—Research Centre for Genomics and Bioinformatics, Via S. Protaso 302, 29017 Fiorenzuola d’Arda, PC, Italy
Interests: seed dormancy; germination; seed physiology and biology; red rice; barley and rice seed quality; barley and rice breeding
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Council for Agricultural Research and Economics—Research Centre for Viticulture and Enology, Viale Santa Margherita 80, 52100 Arezzo, Italy
Interests: plant–pathogen interaction; plant response to environmental stresses; GWAS; linkage mapping; plant genomics; plant transcriptomics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Cereals represent the primary source of nourishment for mankind and livestock worldwide and, consequently, have been subjected to intense and prolonged selection since the rise of civilization. The diversification of purposes in the use of cereal kernels makes breeding, in many ways, a specialized task, though the obtainment of healthy seeds with a good harvest index is a general goal of every cereal breeding programme.

Thanks to the presence of abundant nutritional reservoirs in the embryo (seed oil), bran (proteins, phytates and secondary products) and endosperm (amylaceous and proteinaceous reserves), cereal kernels have two alternative functions: renovating the crop or feeding humans/livestocks. Although the two functions are both grounded onto the nutritional role of the kernel, they have different objectives. Thus, the term ‘seed quality’ assumes different meanings depending on the predominant target.

To produce a high-performing seed, high germination capability and vigour, low dormancy and high resistance to pre-harvest sprouting are key physiological aspects. On the other hand, the chemical composition of the grain is the dominant issue for nutritional quality. Breeding programmes have traditionally strived for a modified aminoacidic and organo-mineral composition, even if it is often associated with worsened vigour. Conflicting targets are a big issue for breeding tasks. In most cases, however, the two functional scopes can be fully compatible. For example, in malting barley breeding, quick germination and good grain composition are consistent targets.

Manuscripts regarding the improvement of seed germinative vigour, grain composition, or both are welcome in this Special Issue. Themes of interest include breeding and pre-breeding for seed vigour and quality, domestication, identification of loci for useful grain traits and analysis of the genetic bases of seed vigour.

Dr. Alberto Gianinetti
Dr. Chiara Biselli
Guest Editors

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Keywords

  • seed quality
  • seed vigour
  • domestication
  • loci affecting grain traits
  • breeding
  • nutritional value

Published Papers (1 paper)

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Research

22 pages, 2297 KiB  
Article
GWAS for Starch-Related Parameters in Japonica Rice (Oryza sativa L.)
by Chiara Biselli, Andrea Volante, Francesca Desiderio, Alessandro Tondelli, Alberto Gianinetti, Franca Finocchiaro, Federica Taddei, Laura Gazza, Daniela Sgrulletta, Luigi Cattivelli and Giampiero Valè
Plants 2019, 8(8), 292; https://doi.org/10.3390/plants8080292 - 19 Aug 2019
Cited by 29 | Viewed by 6317
Abstract
Rice quality is mainly related to the following two starch components, apparent amylose content (AAC) and resistant starch (RS). The former affects grain cooking properties, while RS acts as a prebiotic. In the present study, a Genome Wide Association Scan (GWAS) was performed [...] Read more.
Rice quality is mainly related to the following two starch components, apparent amylose content (AAC) and resistant starch (RS). The former affects grain cooking properties, while RS acts as a prebiotic. In the present study, a Genome Wide Association Scan (GWAS) was performed using 115 rice japonica accessions, including tropical and temperate genotypes, with the purpose of expanding the knowledge of the genetic bases affecting RS and AAC. High phenotypic variation was recorded for the two traits, which positively correlated. Moreover, both the parameters correlated with seed length (positive correlation) and seed width (negative correlation). A correlational selection according to human preferences has been hypothesized for the two starch traits and grain size. In addition, human selection has been proposed as the causal agent even for the different phenotypes related to starch and grain size showed by the tropical and temperate japonica accessions utilized in this study. The present GWAS led to the identification of 11 associations for RS on seven chromosomes and five associations for AAC on chromosome 6. Candidate genes and co-positional relationships with quantitative trait loci (QTLs) previously identified as affecting RS and AAC were identified for 6 associations. The candidate genes and the new RS- and/or AAC-associated regions detected provide valuable sources for future functional characterizations and for breeding programs aimed at improving rice grain quality. Full article
(This article belongs to the Special Issue Cereal Breeding: Improving Seed Vigour Traits and Grain Quality)
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