Intra- and intergenomic chromosomal pairing in artificially polyploidized elephant grass and pearl millet hybrids

Santos, F. M. dos; Torres, Giovana Augusta; Techio, Vânia Helena; Pereira, Antônio Vander; Davide, Lisete Chamma

doi:10.1590/s0100-204x2017000900014

Cited by 2 publications

(1 citation statement)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pearl millet (2n = 2x = 14 chromosomes and with AA genomes) is closely related to Napier grass (2n = 4x = 28 chromosomes and genomes A′A′BB) and their genetic proximity allows the production of hybrids (2n = 3x = 21) 47 . In addition, the genome A of pearl millet and A′ of Napier grass are homeologs forming a pair in the hybrids during meiosis 47,48 . Furthermore, Napier grass sequences have been shown to display a high degree of synteny and considerable collinearity with the pearl millet genome 31 .…”

Section: Discussionmentioning

confidence: 99%

Genotyping by sequencing provides new insights into the diversity of Napier grass (Cenchrus purpureus) and reveals variation in genome-wide LD patterns between collections

Muktar¹,

Teshome

Hanson³

et al. 2019

Sci Rep

View full text Add to dashboard Cite

Napier grass is an important tropical forage-grass and of growing potential as an energy crop. One-hundred-five Napier grass accessions, encompassing two independent collections, were subjected to genotyping by sequencing which generated a set of high-density genome-wide markers together with short sequence reads. The reads, averaging 54 nucleotides, were mapped to the pearl millet genome and the closest genes and annotation information were used to select candidate genes linked to key forage traits. 980 highly polymorphic SNP markers, distributed across the genome, were used to assess population structure and diversity with seven-subgroups identified. A few representative accessions were selected with the objective of distributing subsets of a manageable size for further evaluation. Genome-wide linkage disequilibrium (LD) analyses revealed a fast LD-decay, on average 2.54 kbp, in the combined population with a slower LD-decay in the ILRI collection compared with the EMBRAPA collection, the significance of which is discussed. This initiative generated high-density markers with a good distribution across the genome. The diversity analysis revealed the existence of a substantial amount of variation in the ILRI collection and identified some unique materials from the EMBRAPA collection, demonstrating the potential of the overall population for further genetic and marker-trait-association studies.

show abstract