Results 141 to 150 of about 572,607 (180)

ALL ROADS LEAD TO WEEDINESS: STORIES ABOUT WEEDY RICE ORIGINS, WEEDY GENES AND WEED COMPETITIVENESS [PDF]

, 2017
Over the last ten years, charter schools have become a viable choice for parent’s seeking an alternative to traditional public schools. However, research shows this is not the case for students with disabilities. The purpose of this dissertation was to examine special education in charter schools and traditional public schools located in Massachusetts.
Huang, Zhongyun
openaire   +2 more sources

Weedy Rice (Oryza sativa) II. Response of Weedy Rice to Seed Burial and Flooding Depth

Weed Science, 2012
Weedy rice is a serious problem of cultivated rice in most of the rice-growing areas in Asia, causing increased production costs and yield losses in rice. A study was conducted to determine the response of weedy rice accessions from India (IWR), Malaysia
Bhagirath Singh Chauhan
exaly   +2 more sources

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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
openaire   +4 more sources

Weedy Rice (Oryza sativa) I. Grain Characteristics and Growth Response to Competition of Weedy Rice Variants From Five Asian Countries

Weed Science, 2010
Weedy rice is a serious weed of cultivated rice in most of the rice-growing areas of the tropics and yet, despite its importance as a weed, limited information is available on its biology in Asia.
Bhagirath Singh Chauhan, David E Johnson
exaly   +2 more sources

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
openaire   +2 more sources

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
openaire   +1 more source

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
openaire   +1 more source

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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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
openaire   +1 more source

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
openaire   +1 more source