oryza brachyantha/asthenia

Hybrid weakness is an important reproductive barrier that hinders genetic exchange between different species at the post-zygotic stage. However, our understanding of the molecular mechanisms underlying hybrid weakness is limited. In this study, we report discovery of a novel interspecific hybrid

Hybrid weakness is a type of reproductive isolation in which F₁ hybrids of normal parents exhibit weaker growth characteristics than their parents. F₁ hybrid of the Oryza sativa Indian cultivars 'P.T.B.7' and 'A.D.T.14' exhibits hybrid weakness that is associated with

Hybrid weakness is a post-zygotic hybridization barrier frequently observed in plants, including rice. In this study, we describe the genomic variation among three temperate japonica rice (Oryza sativa ssp. japonica) varieties 'Aranghyangchalbyeo' ('CH7'), 'Sanghaehyangheolua' ('CH8') and

BACKGROUND Hybrid weakness, a phenomenon opposite to heterosis, refers to inferior growth and development in a hybrid relative to its pure-line parents. Little attention has been paid to the phenomenological or mechanistic aspect of hybrid weakness, probably due to its rare occurrence. RESULTS Here,

Weakness of F(1) plants is frequently found in hybrids between strains of Oryza breviligulata (wild) and O. glaberrima (cultivated rice) endemic to West Africa. A set of two complementary dominant weakness genes, W(1) and W(2), was found to control the observed F(1) weakness. Many breviligulata

Reproductive barriers perform a vital role during speciation. Hybrid weakness, the poorer development of hybrids compared with their parents, hinders gene exchange between different species at the postzygotic stage. Here we show that two incompatible dominant loci (Hwi1 and Hwi2) involving three

Products of interspecific crosses often show abnormal phenotypes such as sterility, weakness and inviability. These phenomena play an important role in speciation as mechanisms of postzygotic reproductive isolation (RI). During the past two decades, genetics studies in rice have characterized a

A middle-aged man presented with joint pain and muscle weakness that had begun 2 months before presentation. Three months before presentation, he had begun to take the herbal preparation Chinese red rice. Laboratory testing revealed a moderately elevated creatine phosphokinase level. Symptoms and

Next-generation sequencing technologies provide opportunities to further understand genetic variation, even within closely related cultivars. We performed whole genome resequencing of two elite indica rice varieties, RGD-7S and Taifeng B, whose F1 progeny showed hybrid weakness and hybrid vigor when

Rice stripe disease, caused by rice stripe virus (RSV), is one of the major virus diseases in east Asia. Rice plants infected with RSV usually show symptoms such as chlorosis, weakness, necrosis in newly emerged leaves and stunting. To reveal rice cellular systems influenced by RSV infection,

Reproductive barriers are thought to play an important role in the processes of speciation and differentiation. Asian rice cultivars, Oryza sativa, can be classified into two main types, Japonica and Indica, on the basis of several characteristics. The fertility of Japonica-Indica hybrids differs

Reproductive barriers often arise in hybrid progeny between two varietal groups of Asian cultivated rice ( Oryza sativa L.), Japonica and Indica. Hybrid breakdown showing poor growth habit, and complete sterility was found in the backcrossed progeny derived from a cross between a Japonica variety,

Biochar was carbon-rich and generated by high-temperature pyrolysis of biomass under oxygen-limited conditions. Due to the limitations of surface functional groups and the weakness of surface activity in the field of environmental remediation, the raw biochar frequently was chemically modified to