Results 241 to 250 of about 2,954 (276)

The origins of weedy rice

Molecular Ecology, 2007
AbstractWhere do weeds come from? How do they evolve from nonweedy ancestors? In this issue of Molecular Ecology, Londo and Schaal examine the origin of weedy rice (Oryza sativa) populations in the USA. Analysing nuclear DNA sequence and microsatellite data, they show the importance of parallel evolution, hybridization, gene flow, and migration in the ...
Nolan C, Kane, Eric J, Baack
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Signatures of adaptation in the weedy rice genome

Nature Genetics, 2017
Crop domestication provided the calories that fueled the rise of civilization. For many crop species, domestication was accompanied by the evolution of weedy crop relatives, which aggressively outcompete crops and reduce harvests. Understanding the genetic mechanisms that underlie the evolution of weedy crop relatives is critical for agricultural weed ...
Lin-Feng Li, Ya-Ling Li, Yulin Jia, Ana L Caicedo, Kenneth M Olsen   +4 more
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Evolving insights on weedy rice

Ecological Genetics and Genomics, 2018
Abstract Agricultural weeds that have evolved from de-domesticated (feral) crop plants cause millions of dollars in annual yield losses worldwide and are one of the primary barriers to global crop productivity. Weedy rice (Oryza sativa f. spontanea) is a de-domesticated form of rice that has evolved multiple times independently from different ...
Marshall J. Wedger, Kenneth M. Olsen
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Modeling the Development of Cultivated Rice and Weedy Red Rice

Transactions of the ASABE, 2011
Development models are an important part of crop simulation models and are useful tools for field operations. The objective of this study was to simulate the development of cultivated rice and weedy red rice with a linear model (thermal time model) and with a non-linear model (WE model).
null N. A. Streck, null I. Lago, null F. B. Oliveira, null A. B. Heldwein, null L. A. de Avila, null L. C. Bosco   +5 more
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A derived weedy rice × ancestral cultivar cross identifies evolutionarily relevant weediness QTLs

Molecular Ecology, 2023
AbstractWeedy rice (Oryza spp.) is a weedy relative of the cultivated rice that competes with the crop and causes significant production loss. The BHA (blackhull awned) US weedy rice group has evolved from aus cultivated rice and differs from its ancestors in several important weediness traits, including flowering time, plant height and seed shattering.
Xiang Li, Shulin Zhang, Daniel Lowey, Carter Hissam, Josh Clevenger, Sherin Perera, Yulin Jia, Ana L. Caicedo   +7 more
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Inheritance of Seed Dormancy in Weedy Rice

Crop Science, 2003
Seed dormancy contributes to the adaptability of plants in nature and is of considerable importance in agriculture. The weedy rice (Oryza sativa L.) strains LD, SS18‐2, and TKN12‐2 and cultivar ‘N22’ were selected to investigate the inheritance of dormancy in controlled conditions.
Xing-You Gu, Zong-Xiang Chen, Michael E. Foley   +2 more
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Population Genomics of Weedy Crop Relatives: Insights from Weedy Rice

2020
Weedy crop relatives can evolve as a byproduct of the domestication process, and most modern crop species have conspecific or congeneric weedy relatives. These weedy relatives invade crop fields and aggressively outcompete desirable cultivars through a suite of weediness traits. Weedy rice (Oryza sativa f. spontanea) is a highly morphologically diverse
Lin-Feng Li, Kenneth M. Olsen
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Transcriptomics profiling in response to cold stress in cultivated rice and weedy rice

Gene, 2019
Weedy rice is an important germplasm resource for rice improvement because it has useful genes for many abiotic stresses including cold tolerance. We identified the cold tolerance and cold sensitivity of two weedy rice lines (WR 03-35 and WR 03-26) and two cultivated rice lines (Kongyu 131 and 9311).
Shixin Guan, Quan Xu, Dianrong Ma, Wenzhong Zhang, Zhengjin Xu, Minghui Zhao, Zhifu Guo   +6 more
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Phylogenetic origin and dispersal pattern of Taiwan weedy rice

Pest Management Science, 2019
AbstractBACKGROUNDKnowledge of the genetic diversity and spatial structure of Taiwan weedy red rice (WRR) populations, which adapted in a transplanting system, will facilitate the design of effective methods to control this weed by tracing its origins and dispersal patterns in a given region.RESULTSTaiwan WRR is genetically most similar to Taiwan ...
Dong‐Hong Wu, David R Gealy, Melissa H Jia, Jeremy D Edwards, Ming‐Hsin Lai, Anna M McClung   +5 more
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Strategies to manage weedy rice in Asia

Crop Protection, 2013
Weedy rice, an emerging problem in Asia, increases production costs and reduces farmers' income through yield reduction and through lowered rice value at harvest. Rice farmers in many Asian countries are shifting from transplanting to direct seeding; however, due to physical and physiological similarities of weedy rice to cultivated rice and the ...
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