Finger Millet (Eleusine coracana L. Gartn.) Breeding

Mirza, Neelofar; Marla, Soma S.

doi:10.1007/978-3-030-23108-8_3

Cited by 20 publications

(10 citation statements)

References 107 publications

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“…The more extensive admixture of finger millet in Asia than Africa, most clearly observed in Figure 2d, is consistent with more formal breeding of the crop in Asia, supported by cross‐regional germplasm transfer. For example, in India, an improvement program initiated in the 1960s involved crosses between African and Asian accessions, resulting in “Indaf” varieties (Mirza & Marla, 2019; see more in next section). In further NJ analysis that considered SNPs for sub‐genomes A and B separately, clear geographic structuring of genetic variation was evident in both cases (Figure S7).…”

Section: Resultsmentioning

confidence: 99%

Genomic and phenotypic characterization of finger millet indicates a complex diversification history

Bančič,

Odeny,

Ojulong

et al. 2023

The Plant Genome

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Advances in sequencing technologies mean that insights into crop diversification can now be explored in crops beyond major staples. We use a genome assembly of finger millet, an allotetraploid orphan crop, to analyze DArTseq single nucleotide polymorphisms (SNPs) at the whole and sub‐genome level. A set of 8778 SNPs and 13 agronomic traits was used to characterize a diverse panel of 423 landraces from Africa and Asia. Through principal component analysis (PCA) and discriminant analysis of principal components, four distinct groups of accessions were identified that coincided with the primary geographic regions of finger millet cultivation. Notably, East Africa, presumed to be the crop's origin, exhibited the lowest genetic diversity. The PCA of phenotypic data also revealed geographic differentiation, albeit with differing relationships among geographic areas than indicated with genomic data. Further exploration of the sub‐genomes A and B using neighbor‐joining trees revealed distinct features that provide supporting evidence for the complex evolutionary history of finger millet. Although genome‐wide association study found only a limited number of significant marker‐trait associations, a clustering approach based on the distribution of marker effects obtained from a ridge regression genomic model was employed to investigate trait complexity. This analysis uncovered two distinct clusters. Overall, the findings suggest that finger millet has undergone complex and context‐specific diversification, indicative of a lengthy domestication history. These analyses provide insights for the future development of finger millet.

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Section: Resultsmentioning

confidence: 99%

Genomic and phenotypic characterization of finger millet indicates a complex diversification history

Bančič,

Odeny,

Ojulong

et al. 2023

The Plant Genome

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show abstract

“…2d, is consistent with more formal breeding of the crop in Asia, supported by cross-regional germplasm transfer. For example, in India, an improvement program initiated in the 1960s involved crosses between African and Asian accessions, resulting in 'Indaf' varieties (Mirza & Marla, 2019; see more in next section). In further NJ analysis that considered SNPs for sub-genomes A and B separately, clear geographic structuring of genetic variation was evident in both cases (Fig.…”

Section: Linkage Disequilibrium Decay Along Chromosomes Shows Expected Patterns For Both Subgenomesmentioning

confidence: 99%

Genomic and phenotypic characterization of finger millet indicates a complex diversification history

Bančič

Odeny

et al. 2021

Preprint

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Advances in sequencing technologies mean that insights into crop diversification aiding future breeding can now be explored in crops beyond major staples. For the first time, we use a genome assembly of finger millet, an allotetraploid orphan crop, to analyze DArTseq single nucleotide polymorphisms (SNPs) at the sub-genome level. A set of 8,778 SNPs and 13 agronomic traits characterizing a broad panel of 423 landrace accessions from Africa and Asia suggested the crop has undergone complex, context-specific diversification consistent with a long domestication history. Both Principal Component Analysis and Discriminant Analysis of Principal Components of SNPs indicated four groups of accessions that coincided with the principal geographic areas of finger millet cultivation. East Africa, the considered origin of the crop, appeared the least genetically diverse. A Principal Component Analysis of phenotypic data also indicated clear geographic differentiation, but different relationships among geographic areas than genomic data. Neighbour-joining trees of sub-genomes A and B showed different features which further supported the crop’s complex evolutionary history. Our genome-wide association study indicated only a small number of significant marker-trait associations. We applied then clustering to marker effects from a ridge regression model for each trait which revealed two clusters of different trait complexity, with days to flowering and threshing percentage among simple traits, and finger length and grain yield among more complex traits. Our study provides comprehensive new knowledge on the distribution of genomic and phenotypic variation in finger millet, supporting future breeding intra- and inter-regionally across its major cultivation range.Core ideas8,778 SNPs and 13 agronomic traits characterized a panel of 423 finger millet landraces.4 clusters of accessions coincided with major geographic areas of finger millet cultivation.A comparison of phenotypic and genomic data indicated a complex diversification history.This was confirmed by the analysis of allotetraploid finger millet’s separate sub-genomes.Comprehensive new knowledge for intra- and inter-regional breeding is provided.

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“…There are nine species reported under the genus Eleucine, these include eight African species ((E. africana, E. coracana, E. kigeziensis, E. indica, E. floccifolia, E. intermedia, E. multiflora and E. jaegeri) and one New World species (E. tristachya Lam.) native to Argentina and Uruguay (Lovisolo andGalati 2007, Mirza andMarla, 2019). Cultivated finger millet (Eleusine coracana subsp.…”

Section: Introductionmentioning

confidence: 99%

Revealing genetic diversity in finger millet [Eleusine Coracana (L.) Gaertn] germplasm collected from Uttarakhand hills

2022

EJPB

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Twenty-nine genotypes of finger millet including six checks namely VL324, VL347, VL348, VL352, VL315 and VL149 were used in the present study for estimating the genetic diversity. The study revealed highly significant variance in genotypes for all fourteen traits. The coefficient of variance varied between 4.62 and 14.41 per cent. Grain yield per plot showed the highest GCV (37.33%) and PCV (40.02 %) followed by biological yield per plot GCV (26.21%) and PCV (29.75%). High heritability coupled with high genetic advance was observed in 1000 grains weight, grain yield per plot, days to 50% flowering and biological yield per plot. All 29 genotypes of finger millet genotypes were sorted into eight non-overlapping clusters using Mahalanobis D 2 statistics. Cluster I and cluster VIII had the greatest inter-cluster D-value (19.80), followed by cluster I and cluster VII (18.72). 1000 grains weight contributed maximum towards the total divergence.

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Finger Millet (Eleusine coracana L. Gartn.) Breeding

Cited by 20 publications

References 107 publications

Genomic and phenotypic characterization of finger millet indicates a complex diversification history

Genomic and phenotypic characterization of finger millet indicates a complex diversification history

Genomic and phenotypic characterization of finger millet indicates a complex diversification history

Revealing genetic diversity in finger millet [Eleusine Coracana (L.) Gaertn] germplasm collected from Uttarakhand hills

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