Novel Breeding Technologies in Cereal Crops

A special issue of Agronomy (ISSN 2073-4395).

Deadline for manuscript submissions: closed (10 October 2021) | Viewed by 9727

Special Issue Editors


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Guest Editor
Department of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth, UK
Interests: crop genetics; genomics; breeding

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Guest Editor
IBERS, Aberystwyth University, Aberystwyth, UK
Interests: crop genetics; genomics; genetic engineering
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Special Issue Information

Dear Colleagues,

Plant breeding traditionally has been a very successful endeavor and has delivered highly productive crops varieties worldwide. The rate of genetic improvement in novel varieties, however, needs accelerating to meet the projected future food demands. A revolution in genetics and plant breeding was promised in the late 1980s when techniques were discovered that had the power to capture naturally occurring sequence variations in DNA and turn them into genetic markers. Now dense genetic maps exist for most of the crop, and the whole genomes of tens of agriculturally important crops have now been sequenced and re-sequenced, making millions of heritable markers available to use in trait dissection and plant breeding. Together with genetic mapping, a number of other techniques such as genomic selection and prediction, double haploids, and genome editing have also evolved, offering plant breeders with novel methods. This Special Issue of Agronomy will assess the history of progress in these methods and the difference they are making toward better understanding and breeding agronomical and nutritional important traits. It will summarize all this in practical breeding contexts, using suitable examples from major (rice, wheat, maize) and minor cereals (like oats, pearl millet, and other minor millets), using expert contributors’ own work from across the globe. Contributions combining review papers, research articles, methodology papers, and opinion papers covering the above aspects are solicited.

Dr. Rattan Yadav
Dr. Chandra Bhan Yadav
Guest Editors

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Keywords

  • genetics
  • genomics
  • genetic maps
  • markers
  • marker-assisted selection
  • genetic gains
  • plant breeding
  • genomic selection
  • genomic prediction
  • genome editing
  • double haploids
  • gene editing
  • rice
  • maize
  • wheat
  • pearl millet
  • minor millets
  • oats

Published Papers (2 papers)

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Research

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17 pages, 3441 KiB  
Article
Consensus Genetic Linkage Map Construction Based on One Common Parental Line for QTL Mapping in Wheat
by Xin Hu, Yingquan Zhang, Jingjuan Zhang, Shahidul Islam, Maoyun She, Yun Zhao, Guixiang Tang, Yanjie Jiang, Junkang Rong and Wujun Ma
Agronomy 2021, 11(2), 227; https://doi.org/10.3390/agronomy11020227 - 26 Jan 2021
Cited by 2 | Viewed by 2617
Abstract
The consensus map is used for the verification of marker order, quantitative trait locus (QTL) mapping and molecular marker-assisted selection (MAS) in wheat breeding. In this study, a wheat consensus genetic map named as Sp7A_G7A, was constructed using 5643 SNP markers in two [...] Read more.
The consensus map is used for the verification of marker order, quantitative trait locus (QTL) mapping and molecular marker-assisted selection (MAS) in wheat breeding. In this study, a wheat consensus genetic map named as Sp7A_G7A, was constructed using 5643 SNP markers in two double haploid (DH) populations of Spitfire × Bethlehem-7AS (Sp7A) and Gregory × Bethlehem-7AS (G7A), covering 4376.70 cM of 21 chromosomes (chr) with an average interval of 0.78 cM. The collinearity of the linkage maps with the consensus map of Con_map_Wang2014 and the physical map of wheat reference genome (IWGSC RefSeq v1.0) were analyzed based on the Spearman rank correlation coefficients. As results, the three constructed genetic maps of Sp7A, G7A and Sp7A_G7A showed high collinearity with the Con_map_Wang2014 and the physical map, and importantly, the collinearity level between our constructed maps and the wheat physical map is higher than that between the Con_map_Wang2014 and the physical map. The seed coat color QTL detected in both populations under multiple environments were on the region (745.73–760.14 Mbp) of the seed color gene R-B1/Tamyb10-B1 (TraesCS3B02G515900, 3B: 757,918,264–757,920,082 bp). The validated consensus map will be beneficial for QTL mapping, positional cloning, meta-QTL analysis and wheat breading. Full article
(This article belongs to the Special Issue Novel Breeding Technologies in Cereal Crops)
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Review

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25 pages, 4063 KiB  
Review
Effective Crop Management and Modern Breeding Strategies to Ensure Higher Crop Productivity under Direct Seeded Rice Cultivation System: A Review
by Nitika Sandhu, Shailesh Yadav, Vikas Kumar Singh and Arvind Kumar
Agronomy 2021, 11(7), 1264; https://doi.org/10.3390/agronomy11071264 - 22 Jun 2021
Cited by 12 | Viewed by 6351
Abstract
Paddy production through conventional puddled system of rice cultivation (PTR) is becoming more and more unsustainable—economically and environmentally—as this method is highly resource intensive and these resources are increasingly becoming scarce, and consequently, expensive. The ongoing large-scale shift from puddled system of rice [...] Read more.
Paddy production through conventional puddled system of rice cultivation (PTR) is becoming more and more unsustainable—economically and environmentally—as this method is highly resource intensive and these resources are increasingly becoming scarce, and consequently, expensive. The ongoing large-scale shift from puddled system of rice cultivation PTR to direct seeded rice (DSR) necessitates a convergence of breeding, agronomic and other approaches for its sustenance and harnessing natural resources and environmental benefits. Current DSR technology is largely based on agronomic interventions applied to the selected varieties of PTR. In DSR, poor crop establishment due to low germination, lack of DSR-adapted varieties, high weed-nematode incidences and micronutrient deficiency are primary constraints. The approach of this review paper is to discuss the existing evidences related to the DSR technologies. The review highlights a large number of conventionally/molecularly characterized strains amenable to rapid transfer and consolidation along with agronomic refinements, mechanization and water-nutrient-weed management strategies to develop a complete, ready to use DSR package. The review provides information on the traits, donors, genes/QTL needed for DSR and the available DSR-adapted breeding lines. Furthermore, the information is supplemented with a discussion on constrains and needed policies in scaling up the DSR adoption. Full article
(This article belongs to the Special Issue Novel Breeding Technologies in Cereal Crops)
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