The adoption of modern rice cultivars has increased annual production in the past three decades by 2.4% per annum and average yield by 71% (Khush and Virk 2002). Modern cultivars continue to replace thousands of traditional cultivars (Chang 1994). Although the number of landraces used in breeding modern cultivars has increased in the same period (Hossain et al 2003), many modern cultivars share...

Long-grain rice cultivars Cocodrie, Wells, and XP 723 grown in three locations (Hazen, MO; Essex and Newport, AR, USA), and medium-grain rice cultivars Bengal and XP 713 grown in two locations (Jonesboro and Lodge Corner, AR, USA), were harvested and assayed for susceptibility to Rhyzopertha dominica (F.) (Coleoptera: Bostrichidae), the lesser grain borer, and Sitophilus oryzae (L.) (Coleoptera...

BACKGROUND In the recent years, cases of elderly women suffering from metabolic diseases such as dyslipidemias brought about by hormonal imbalance after menopause are continuously increasing. In this regard, a continuous and escalating demand to develop a more functional and highly nutritional food product as an adjunct supplement that can help alleviate these diseases is still being sought. ...

Seed shattering is an important trait that distinguishes crop cultivars from the wild and weedy species. The genetics of seed shattering was investigated in this study to provide insights into rice domestication and the evolution of weedy rice. Quantitative trait locus (QTL) analysis, conducted in 2 recombinant inbred populations involving 2 rice cultivars and a weedy rice accession of the sout...

Here we examined the properties of endosperm starches and the physical properties of cooked rice from four cultivars of Japanese upland rice containing M-type amylopectin (Chikanarijyun1, Kairyo13, Mogamichikanari1 and Hokkaiakage); S-type Nipponbare and L-type Kasalath served as standards. The amylopectin chain ratio (ACR ; ratio of the short chains of DP ≤ 10 to the short and intermediate cha...

Improving cooking and eating quality of rice is one of the important objectives of many breeding programs. The study of genetic diversity in specific regions of rice genome using molecular markers is an important index that can be used for the application of marker assisted selection (MAS) in rice breeding programs. In this study, 48 rice genotypes were grouped using 7 microsatellite (SSR) mark...

Zn deficiency is one of the most important micro-nutritional disorders in lowland rice. In this work, fourteen Iranian rice cultivars were studied in the field as well as in solution culture experiments to determine genotypic differences for traits characterizing Zn efficiency. A low uptake efficiency was observed in some (Onda and Kadoos) of the Zn-inefficient genotypes. A relatively high corr...

Sucrose synthase activity in rice is potentially yield limiting. This is because the carbon that forms starch enters the developing rice grain as sucrose and that sucrose must be broken down to form the precursors of starch. The enzyme that breaks down sucrose in the filling rice grain is sucrose synthase. Earlier research efforts on rice physiology indicated that endosperm sucrose-synthase act...