{Reference Type}: Journal Article
{Title}: Genome-wide association study identifies variation of glucosidase being linked to natural variation of the maximal quantum yield of photosystem II.
{Author}: Hamdani S;Wang H;Zheng G;Perveen S;Qu M;Khan N;Khan W;Jiang J;Li M;Liu X;Zhu X;Govindjee ;Chu C;Zhu XG;
{Journal}: Physiol Plant
{Volume}: 166
{Issue}: 1
{Year}: May 2019
{Factor}: 5.081
{DOI}: 10.1111/ppl.12957
{Abstract}: The maximum quantum yield of photosystem II (as reflected by variable to maximum chlorophyll a fluorescence, Fv /Fm ) is regarded as one of the most important photosynthetic parameters. The genetic basis underlying natural variation in Fv /Fm , which shows low level of variations in plants under non-stress conditions, is not easy to be exploited using the conventional gene cloning approaches. Thus, in order to answer this question, we have followed another strategy: we used genome-wide association study (GWAS) and transgenic analysis in a rice mini-core collection. We report here that four single-nucleotide polymorphisms, located in the promoter region of β-glucosidase 5 (BGlu-5), are associated with observed variation in Fv /Fm . Indeed, our transgenic analysis showed a good correlation between BGlu-5 and Fv /Fm . Thus, our work demonstrates the feasibility of using GWAS to study natural variation in Fv /Fm , suggesting that cis-element polymorphism, affecting the BGlu-5 expression level, may, indirectly, contribute to Fv /Fm variation in rice through the gibberellin signaling pathway. Further research is needed to understand the mechanism of our novel observation.