Results 31 to 40 of about 1,879 (240)

Timing is everything: early degradation of abscission layer is associated with increased seed shattering in U.S. weedy rice

open access: yesBMC Plant Biology, 2011
Background Seed shattering, or shedding, is an important fitness trait for wild and weedy grasses. U.S. weedy rice (Oryza sativa) is a highly shattering weed, thought to have evolved from non-shattering cultivated ancestors. All U.S.
Hepler Peter K   +2 more
doaj   +1 more source

Something old, something new: Evolution of Colombian weedy rice (Oryza spp.) through de novo de‐domestication, exotic gene flow, and hybridization

open access: yesEvolutionary Applications, 2020
Weedy rice (Oryza spp.) is a worldwide weed of domesticated rice (O. sativa), considered particularly problematic due to its strong competition with the crop, which leads to reduction in yields and harvest quality.
Verónica Hoyos   +3 more
doaj   +1 more source

Weedy Rice Infestation in Malaysia: What Do We Know and Where Do We Go?

open access: yesAgriculture
Weedy rice is a notorious weed in the rice agroecosystem. Its infestation has caused significant economic loss in many rice-production countries, including Malaysia.
Intan Filzah Mahmod   +5 more
doaj   +1 more source

Molecular evolution of the rice blast resistance gene Pi-ta in invasive weedy rice in the USA. [PDF]

open access: yesPLoS ONE, 2011
The Pi-ta gene in rice has been effectively used to control rice blast disease caused by Magnaporthe oryzae worldwide. Despite a number of studies that reported the Pi-ta gene in domesticated rice and wild species, little is known about how the Pi-ta ...
Seonghee Lee   +5 more
doaj   +1 more source

The Role of Standing Variation in the Evolution of Weedines Traits in South Asian Weedy Rice (Oryza spp.)

open access: yesG3: Genes, Genomes, Genetics, 2018
Weedy rice (Oryza spp.) is a problematic weed of cultivated rice (O. sativa) around the world. Recent studies have established multiple independent evolutionary origins of weedy rice, raising questions about the traits and genes that are essential for ...
Zhongyun Huang   +7 more
doaj   +1 more source

Genomic divergence during feralization reveals both conserved and distinct mechanisms of parallel weediness evolution

open access: yesCommunications Biology, 2021
Imaizumi et al. examine the origin and evolution of Japanese weedy rice and document the role of hybridization in weedy rice origins. Their results show that there is parallel evolution in rice feralization, and document the temperate and tropical ...
Toshiyuki Imaizumi   +6 more
doaj   +1 more source

Occurrence pattern and morphological polymorphism of Chinese weedy rice

open access: yesJournal of Integrative Agriculture, 2023
Rice, the main food crop in China, has been sporadically reported to suffer from weedy rice infestation. However, the overall occurrence and distribution pattern of Chinese weedy rice remains unclear because a systematic survey has not been conducted. In
Hao-quan WANG   +8 more
doaj   +1 more source

Morphological Relationships between Weedy Rice Morphotypes and Commercial Rice Varieties in Perak, Malaysia

open access: yesInternational Journal of Bio-Resource and Stress Management, 2023
Weedy rice has become a major problem in Malaysia for the last few decades. A com­parative morphological study was conducted to characterize weedy rice population by collecting weedy rice morphotypes from six sites among the Perak rice granaries in ...
Q. N. Ahmed, H. Zainudin, A. S. Othman
doaj  

Conspecific crop-weed introgression influences evolution of weedy rice (Oryza sativa f. spontanea) across a geographical range.

open access: yesPLoS ONE, 2011
BackgroundIntrogression plays an important role in evolution of plant species via its influences on genetic diversity and differentiation. Outcrossing determines the level of introgression but little is known about the relationships of outcrossing rates,
Han-Bing Xia   +4 more
doaj   +1 more source

Expression of genes in cultivated rice and weedy rice in competition

open access: yesAustralian Journal of Crop Science, 2016
The competition for resources such as light and nitrogen between red rice and cultivated rice can trigger responses in plants that interfere with growth and productivity as well as the expression of genes related to competition-induced stress. Due to its sensitivity, accuracy, and specificity, real-time reverse transcription PCR (RT-qPCR) is an ...
Marcos Andre Nohato   +5 more
openaire   +1 more source

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