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Genomic Selection in Cereal Crops: Methods and Applications

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Accelerated Plant Breeding, Volume 1

Abstract

Most of the traits in plants are not controlled by single gene, but rather a cluster of genes. The variation in activity of chromosome is controlled by the recombination established by the series of balanced system that is called linked balanced polygenic complex. Regardless of the complexity of genetic material, breeders have developed advanced and precise approaches to overcome the problems faced in the crop improvement. Thus, using genomic selection (GS), we can achieve a constellation of genes attributed by the region of chromosome. They integrated phenotype data with the right bioinformatics tools, statistical tests, and huge amount of genomic data to target the selection of best line having superior phenotypes along with the absolute knowledge of genotype. With GS we can identify the minor-effect genes, QTLs, and markers. Since decades of population explosion, it has been a challenge to deliver breeding targets for developing best-quality crops having required grain yield. Earlier, breeding of crops involved a series of cycle of phenotypic evaluation and crossing followed by the selection of superior phenotype which consumed more time and manpower. In GS there is no need for repeated phenotyping to select the elite lines. Along with the integration of genomic information, bioinformatics tools, and statistical models, we cannot overlook marker-trait associations, variant calling at genome level, and population structure that provide comprehensive information of all elements necessary in crop improvement. However, it is still challenging for the plant breeders to develop crops capable to thrive successfully in tough climate. In this chapter, we will explore the factors affecting the selection of superior genotype, how we can design a suitable breeding pipeline along with the concept of statistical model, advantages, and applications. For decades, translating the complex genomic data has been a major challenge for crop improvement. GS is a remarkable approach for genetic gain as it consumes only one-third time compared to the traditional selection process.

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Abbreviations

AFLP:

Amplified fragment length polymorphism

ARMS:

Amplification refractory mutation system

BLUE:

Best linear unbiased estimation

BLUP:

Best linear unbiased prediction

CIMMIYT:

International Maize and Wheat Improvement Center

CRISPR:

Clustered regularly interspaced short palindromic repeats

DArT:

Diversity arrays technology

DH:

Doubled haploids

F1:

First filial generation

GBLUP:

Genomic best linear unbiased prediction

GEBVs:

Genomic estimated breeding values

GS:

Genomic selection

HTG:

High-throughput genotyping

IRGAs:

Infrared gas analyzers

IRT:

Infrared thermography

ISSR:

Inter-simple sequence repeats

LASSO:

Least absolute shrinkage and selection operator

LD:

Linkage disequilibrium

LS:

Least square

MAS:

Marker-assisted selection

MCMC:

Markov chain Monte Carlo

MTA:

Marker-trait association

NAM:

Nested association mapping

NCII :

North Carolina II design

Ne:

Effective population size

NGS:

Next-generation sequencing

PLS:

Partial least square

PM-RKHS:

Pedigree plus molecular marker model using reproducing kernel Hilbert space regression

QTL:

Quantitative trait loci

RBFNN:

Radial basis function neural networks

RF:

Random forest

RFLP:

Restriction fragment length polymorphism

RILs:

Recombinant inbred lines

RTK-GPS:

Global position system-real-time kinematic

RR:

Ridge regression

SNPs:

Single nucleotide polymorphisms

SSRs:

Simple sequence repeats

STS:

Sequence-tagged site

SVM:

Support vector machine

TRAPs:

Target region amplification polymorphisms

TRN:

Training population

TST:

Testing population

WBSR:

Weight Bayesian shrinkage regression

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Acknowledgment

National Agri-Biotechnology Institute (NABI), Department of Biotechnology, Govt. of India, Mohali is acknowledged for support. DeLCON (DBT-Electronic Library Consortium), Gurgaon, India, is acknowledged for the online journal access. T R Sharma is thankful to the Department of Science and Technology, Govt. of India, for J. C. Bose National Fellowship.

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Correspondence to Joy Roy .

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Rahim, M.S. et al. (2020). Genomic Selection in Cereal Crops: Methods and Applications. In: Gosal, S., Wani, S. (eds) Accelerated Plant Breeding, Volume 1. Springer, Cham. https://doi.org/10.1007/978-3-030-41866-3_3

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