TL;DR: It is shown that a quantitative trait locus GW8 is synonymous with OsSPL16, which encodes a protein that is a positive regulator of cell proliferation that promotes cell division and grain filling, with positive consequences for grain width and yield in rice.
Abstract: Grain size and shape are important components of grain yield and quality and have been under selection since cereals were first domesticated. Here, we show that a quantitative trait locus GW8 is synonymous with OsSPL16, which encodes a protein that is a positive regulator of cell proliferation. Higher expression of this gene promotes cell division and grain filling, with positive consequences for grain width and yield in rice. Conversely, a loss-of-function mutation in Basmati rice is associated with the formation of a more slender grain and better quality of appearance. The correlation between grain size and allelic variation at the GW8 locus suggests that mutations within the promoter region were likely selected in rice breeding programs. We also show that a marker-assisted strategy targeted at elite alleles of GS3 and OsSPL16 underlying grain size and shape can be effectively used to simultaneously improve grain quality and yield.
TL;DR: In this article, the authors present an analysis of fixed bed drying systems and simulate grain drying in-bin and high capacity grain drying systems, including Rice drying, grain handling, and dryer control.
Abstract: Grain production, preservation and trade Grain structure, composition and properties Drying-air properties Grain equilibrium moisture content Grain quality: air flow for drying Introductory analysis of fixed bed drying systems Theory and simulation of grain drying In-bin drying High capacity grain drying systems Rice drying Grain handling Dryer control systems Grain-storage management Appendices: conversion of units Airflow through grains Maps of wet-bulb temperatures and depressions Physical properties of grains and oilseeds Thermal properties of grains Heating values for fuel Formulas for calculating capacities of cylindrical grain bins Grading standards for grains.
TL;DR: New research strategies, as well as access to the draft of the rice genome, will not only advance the understanding of the molecular mechanisms that lead to quality rice but will also pave the way for efficient and targeted grain improvement.
TL;DR: In this article, the authors provided a hybrid corn plant, designated 3790, produced by crossing two Pioneer Hi-Bred International Inc. proprietary inbred lines of corn, which was characterized by superior yields and excellent early season cold tolerance, and good grain quality.
Abstract: According to the invention, there is provided a hybrid corn plant, designated 3790, produced by crossing two Pioneer Hi-Bred International, Inc. proprietary inbred lines of corn. This invention thus relates to the hybrid seed 3790, the hybrid plant produced from the seed, variants, mutants, and modifications of Pioneer hybrid 3790. This hybrid corn plant is characterized by superior yields and excellent early-season cold tolerance, and good grain quality.
TL;DR: Manipulation of the OsSPL16-GW7 module represents a new strategy to simultaneously improve rice yield and grain quality and is associated with higher grain quality without the yield penalty imposed by the Basmati gw8 allele.
Abstract: The deployment of heterosis in the form of hybrid rice varieties has boosted grain yield, but grain quality improvement still remains a challenge. Here we show that a quantitative trait locus for rice grain quality, qGW7, reflects allelic variation of GW7, a gene encoding a TONNEAU1-recruiting motif protein with similarity to C-terminal motifs of the human centrosomal protein CAP350. Upregulation of GW7 expression was correlated with the production of more slender grains, as a result of increased cell division in the longitudinal direction and decreased cell division in the transverse direction. OsSPL16 (GW8), an SBP-domain transcription factor that regulates grain width, bound directly to the GW7 promoter and repressed its expression. The presence of a semidominant GW7(TFA) allele from tropical japonica rice was associated with higher grain quality without the yield penalty imposed by the Basmati gw8 allele. Manipulation of the OsSPL16-GW7 module thus represents a new strategy to simultaneously improve rice yield and grain quality.