biostudies-literatureWang Hthe National 863 projectthe National Natural Science Foundation of ChinaE2159https://www.ebi.ac.uk/biostudies/studies/S-EPMC6121324biostudies-literatureUnknown19(8)Abnormally developed endosperm strongly affects rice (<i>Oryza sativa</i>) appearance quality and grain weight. Endosperm formation is a complex process, and although many enzymes and related regulators have been identified, many other related factors remain largely unknown. Here, we report the isolation and characterization of a recessive mutation of <i>White Belly 1</i> (<i>WB1</i>), which regulates rice endosperm development, using a modified MutMap method in the rice mutant <i>wb1</i>. The <i>wb1</i> mutant develops a white-belly endosperm and abnormal starch granules in the inner portion of white grains. Representative of the white-belly phenotype, grains of <i>wb1</i> showed a higher grain chalkiness rate and degree and a lower 1000-grain weight (decreased by ~34%), in comparison witInternational journal of molecular sciences<i>WB1</i>, a Regulator of Endosperm Development in Rice, Is Identified by a Modified MutMap Method.PMC6121324#201403002#2016C02050-1CAAS-ASTIP-2013-CNRRI#31521064#2014AA10A603Cao LAnis GBMeng SXu PWang HChen DSun LCheng SRiaz ATu RZhang YWu WShen XHussain Kfalse<i>WB1</i>, a Regulator of Endosperm Development in Rice, Is Identified by a Modified MutMap Method.Abnormally developed endosperm strongly affects rice (<i>Oryza sativa</i>) appearance quality and grain weight. Endosperm formation is a complex process, and although many enzymes and related regulators have been identified, many other related factors remain largely unknown. Here, we report the isolation and characterization of a recessive mutation of <i>White Belly 1</i> (<i>WB1</i>), which regulates rice endosperm development, using a modified MutMap method in the rice mutant <i>wb1</i>. The <i>wb1</i> mutant develops a white-belly endosperm and abnormal starch granules in the inner portion of white grains. Representative of the white-belly phenotype, grains of <i>wb1</i> showed a higher grain chalkiness rate and degree and a lower 1000-grain weight (decreased by ~34%), in comparison wit2018-01-01T00:00:00Z2018 Jul2026-04-08T00:42:42.707Z2019-03-26T23:54:52ZS-EPMC61213243004235210.3390/ijms19082159