The paper examines the relationship between China's grain trade and domestic grain economy through an institutional perspective. It reveals that China's grain imports have been primarily necessitated by filling the physical gap between domestic grain demand and supply. Due to the special institutional background under which the domestic grain economy segmented into two relatively independent pa...

this study was conducted to investigate the genotype¬×¬environment interaction effects on yield and yield components of wheat. ten cultivars of wheat were evaluated in 8 environments (combinations of two levels of nitrogen and four irrigation regimes) in growing season of 2006-2007 at the research farm of isfahan university of technology. based on the stability parameters of eberhart and russel...

Effect of high temperature tolerance in relation to carbon partitioning and grain sink activity was studied in ten genotypes of wheat (viz C 306, PBW 343, PBW 502, PBW 509, PBW 521, PBW 522, PBW 550, Inqalab, WL 711 and Sonalika) under normal (November, 25.6 ̊C during grain filling) and late planting conditions (December, 29.4 ̊C).

4 Technical aspects of KMC 8 4.1 Representation of the grain . . . . . . . . . . 9 4.2 Input parameters in grain models: filling the table of events . . . . . . . . . . . . . . . . . 9 4.2.1 Sticking Fractions . . . . . . . . . . 10 4.2.2 Thermal desorption rates . . . . . . . 10 4.2.3 Diffusion rates . . . . . . . . . . . . 11 4.2.4 Theoretical determination of rates . . 13 4.3 Kinetic Monte C...

Pearl millet is highly resilient to some of the driest areas of the world, like the Sahel area or fringes of the Thar desert in India. Despite this, there is a wealth of variation in pearl millet genotypes for their adaptation to drought and the object of this paper was to review some related work in the past 25 years to harness these capacities toward the breeding of better adapted cultivars. ...

AIMS Agronomy and breeding actively search for options to enhance cereal grain Zn density. Quantifying internal (re-)allocation of Zn as affected by soil and crop management or genotype is crucial. We present experiments supporting the development of a conceptual model of whole plant Zn allocation and re-allocation in rice. METHODS Two solution culture experiments using (70)Zn applications at...

In wheat, stem water soluble carbohydrates (WSC), composed mainly of fructans, are the major carbon sources for grain filling during periods of decreasing photosynthesis or under drought stress after anthesis. Here, in a field drought experiment, WSC levels and associated enzyme activities were followed in different stem segments (peduncle, penultimate internode, lower parts of stem, and sheath...

Stay-green, a key trait of wheat, can not only increase the yield of wheat but also its resistance to heat stress during active photosynthesis. Cytokinins are the most potent general coordinator between the stay-green trait and senescence. The objectives of the present study were to identify and assess the effects of cytokinins on the photosynthetic organ and heat resistance in wheat. Two winte...