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Translocation of a parthenogenesis gene candidate to an alternate carrier chromosome in apomictic Brachiaria humidicola

The apomictic reproductive mode of Brachiaria (syn. Urochloa) forage species allows breeders to faithfully propagate heterozygous genotypes through seed over multiple generations. In Brachiaria, reproductive mode segregates as single dominant locus, the apospory-specific genomic region (ASGR). The A...

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Main Authors: Worthington, Margaret, Ebina, Masumi, Yamanaka, Naoki, Heffelfinger, Christopher, Quintero, Constanza, Zapata, Yeny Patricia, Pérez, Juan Guillermo, Selvaraj, Michael Gomez, Ishitani, Manabu, Duitama, Jorge, Hoz, Juan Fernando de la, Rao, Idupulapati M., Dellaporta, Stephen L., Tohme, Joseph M., Arango, Jacobo
Format: Journal Article
Language:Inglés
Published: Springer 2019
Subjects:
feed crops
apomixis
parthenogenesis
aneuploidy
urochloa
brachiaria
Online Access:https://hdl.handle.net/10568/99319
Summary:The apomictic reproductive mode of Brachiaria (syn. Urochloa) forage species allows breeders to faithfully propagate heterozygous genotypes through seed over multiple generations. In Brachiaria, reproductive mode segregates as single dominant locus, the apospory-specific genomic region (ASGR). The AGSR has been mapped to an area of reduced recombination on Brachiaria decumbens chromosome 5. A primer pair designed within ASGR-BABY BOOM-like (BBML), the candidate gene for the parthenogenesis component of apomixis in Pennisetum squamulatum, was diagnostic for reproductive mode in the closely related species B. ruziziensis, B. brizantha, and B. decumbens. In this study, we used a mapping population of the distantly related commercial species B. humidicola to map the ASGR and test for conservation of ASGR-BBML sequences across Brachiaria species.

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