Plant-specific hybrid @entity1521 - or @entity8959 -rich proteins (HyP/GRPs) are involved in diverse gene functions including plant development and responses to biotic and abiotic stresses. The quantitative trait locus, qLTG3-1, enhances seed germination in @entity579 under low-temperature conditions and encodes a member with a @entity8959 -rich motif of the HyP/GRP family. The function of this gene may be related to the weakening of tissue covering the embryo during seed germination. In the present study, the diversification of the HyP/GRP gene family was elucidated in @entity579 based on phylogenetic relationships and gene expression levels. At least 21 members of the HyP/GRP family have been identified in the @entity579 genome and clustered in five regions on four chromosomes by tandem and chromosomal duplications. Of these, OsHyPRP05 (qLTG3-1) and its paralogous gene, OsHyPRP21, had a @entity8959 -rich motif. Furthermore, orthologous genes with a @entity8959 -rich motif and the HyP/GRP gene family were detected in four genome-sequenced monocots: 12 in @entity2247 , 10 in Brachypodium, 20 in @entity2829 , and 28 in @entity1101 , using a BLAST search of qLTG3-1 as the query. All members of the HyP/GRP family in these five species were classified into seven main groups, which were clustered together in these species. These results suggested that the HyP/GRP gene family was formed in the ancestral genome before the divergence of these species. The collinearity of chromosomal regions around qLTG3-1 and its orthologous genes were conserved among @entity579 , Brachypodium, @entity1101 , and @entity2829 , indicating that qLTG3-1 and orthologous genes conserve gene function during seed germination.

Diversification of the plant-specific hybrid XXXX -rich protein (HyGRP) genes in cereals.

@entity8959 :: ('D005998', 'Chemical') :: ['glycine'] @entity2247 :: ('4513', 'Species') :: ['barley'] @entity2829 :: ('4577', 'Species') :: ['maize'] @entity1101 :: ('4558', 'Species') :: ['sorghum'] @entity1521 :: ('CHEBI:26271', 'Chemical') :: ['proline'] @entity579 :: ('4530', 'Species') :: ['rice']
@entity8959 :: (D005998,Chemical) :: ['glycine']
