A large-grain rice cultivar, Akita 63, exhibits high yields with high physiological N-use efficiency

Photosynthesis, Grain Yield, and Nitrogen Utilization in Rice and Wheat

“…For these high-yielding cultivars, however, a decline in the ratio of filled grains is frequently observed when grown with heavy N application (Matsushima, 1993;Mae et al, 2006). This may be because source capacity has not been improved whereas the grain sink has been successfully enlarged with N application.…”

“…For japonica rice genotypes, a new type of high-yielding and large-grain cultivar, Akita 63 has been released (Mae et al, 2006). While the grain number of this cultivar did not differ from the common japonica cultivars at any given plant N content ( Fig.…”

Varietal Differences in Morphological Traits, Dry Matter Production and Yield of High-Yielding Rice in the Tohoku Region of Japan

“…Mae et al (2006) also showed that the high nitrogen use effi ciency of the large grain-type variety "Akita 63" resulted in the large sink size. In our study, total nitrogen (g m -2 ) and leaf nitrogen (%) at the full heading stage hardly varied with the variety (Table 4).…”

“…In colder areas of Japan such as the Tohoku region, japonica type and large grain type varieties often record high yields (Wang et al, 1997;Kuroda et al, 1999;Nagata et al, 2007). Mae et al (2006) reported that a large grain type variety Akita63 produced a high yield due to high nitrogen use efficiency. However, the morphological traits and ripening process related to high yielding in the Tohoku region are not fully understood.…”

Impacts of autophagy on nitrogen use efficiency in plants

“…Engineering N use efficiency (NUE) is essential for sustainable and productive agriculture (Good et al 2004;Mae et al 2006;Vitousek et al 2009;Masclaux-Daubresse et al 2010;Kant et al 2011;Makino 2011;Xu et al 2012). Although NUE can be defined in several ways, the simplest definition for crop plants is the yield (grain, fruit or forage) per unit of N available in the soil (Kant et al 2011) or from N application (Mae et al 2006).…”