scholarly journals Histological and genetic characteristics associated with the seed-shattering habit of weedy rice (Oryza sativa L.) from Okayama, Japan

2011 ◽  
Vol 61 (2) ◽  
pp. 168-173 ◽  
Author(s):  
Maiko Akasaka ◽  
Saeko Konishi ◽  
Takeshi Izawa ◽  
Jun Ushiki
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Weedy Rice ◽  
Seed Shattering ◽  
Genetic Characteristics

Genetic characteristics of Korean weedy rice (Oryza sativa L.) by RFLP analysis

Euphytica ◽  
1995 ◽  
Vol 86 (2) ◽  
pp. 103-110 ◽  
Author(s):  
Young-Chan Cho ◽  
Tae-Young Chung ◽  
Hak-Soo Suh
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Rflp Analysis ◽  
Weedy Rice ◽  
Genetic Characteristics

scholarly journals Bioherbicidal Properties of Parthenium hysterophorus, Cleome rutidosperma and Borreria alata Extracts on Selected Crop and Weed Species

Agronomy ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 643
Author(s):  
Mst. Motmainna ◽  
Abdul Shukor Juraimi ◽  
Md. Kamal Uddin ◽  
Norhayu Binti Asib ◽  
A. K. M. Mominul Islam ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Plant Extracts ◽  
Oryza Sativa L ◽  
Block Design ◽  
Parthenium Hysterophorus ◽  
Weedy Rice ◽  
Test Plant ◽  
Ageratum Conyzoides ◽  
Natural Herbicide ◽  
Cleome Rutidosperma

Natural product-based herbicides could be the effective alternatives to synthetic chemical herbicides for eco-friendly weed management. This research, therefore, was conducted to identify the phytotoxic properties of Parthenium hysterophorus L., Cleome rutidosperma DC. and Borreria alata (Aubl.) DC. with a view to introducing them as a tool for natural herbicide development. The methanol extracts of these plants were examined on the germination and growth of Zea mays L., Oryza sativa L., Abelmoschus esculentus (L.) Moench and Amaranthus gangeticus L., Oryza sativa f. Spontanea Roshev. (Weedy rice), Echinochloa colona (L.) Link., Euphorbia hirta L., and Ageratum conyzoides L. under laboratory and glasshouse conditions. A complete randomized design (CRD) with five replications and randomized complete block design (RCBD) with four replications were laid out for laboratory and glasshouse experiments, respectively. In the laboratory experiment, three plant extracts of 0, 6.25, 12.5, 50, and 100 g L−1 were tested on survival rate, hypocotyl, and radicle length of eight test plant species. No seed germination of A. conzyoides, E. hirta, and A. gangeticus were recorded when P. hysterophorus extract was applied at 50 g L−1. C. rutidosperma had the same effect on those plants at 100 g L−1. In the glasshouse, similar extracts and concentrations used in the laboratory experiments were sprayed on at the 2–3 leaf stage for grasses and 4–6 for the broadleaf species. Tested plants were less sensitive to C. rutidosperma and B. alata compared to P. hysterophorus extract. Among the weeds and crops, A. conyzoides, E. hirta, A. esculentus and A. gangeticus were mostly inhibited by P. hysterophorus extract at 100 g L−1. Based on these results, P. hysterophorus was the most phytotoxic among the tested plant extracts and could be used for developing a new natural herbicide for green agriculture.

Effects of winter flooding on weedy rice (Oryza sativa L.)

2010 ◽  
Vol 29 (11) ◽  
pp. 1232-1240 ◽  
Author(s):  
S. Fogliatto ◽  
F. Vidotto ◽  
A. Ferrero
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Weedy Rice ◽  
Winter Flooding

Origin of seed shattering in rice (Oryza sativa L.)

Planta ◽  
2007 ◽  
Vol 226 (1) ◽  
pp. 11-20 ◽  
Author(s):  
Zhongwei Lin ◽  
Megan E. Griffith ◽  
Xianran Li ◽  
Zuofeng Zhu ◽  
Lubing Tan ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Seed Shattering

Effect of rice establishment methods on weedy rice (Oryza sativa L.) infestation and grain yield of cultivated rice (O. sativa L.) in Sri Lanka

2014 ◽  
Vol 55 ◽  
pp. 42-49 ◽  
Author(s):  
Bhagirath S. Chauhan ◽  
Anuruddhika S.K. Abeysekera ◽  
Manoja S. Wickramarathe ◽  
Sakinda D. Kulatunga ◽  
Upali B. Wickrama
Keyword(s):  
Oryza Sativa ◽  
Sri Lanka ◽  
Grain Yield ◽  
Oryza Sativa L ◽  
Weedy Rice ◽  
Cultivated Rice

Fine mapping of a gene causing hybrid pollen sterility between Yunnan weedy rice and cultivated rice (Oryza sativa L.) and phylogenetic analysis of Yunnan weedy rice

Planta ◽  
2009 ◽  
Vol 231 (3) ◽  
pp. 559-570 ◽  
Author(s):  
Yong Wang ◽  
Zheng Zheng Zhong ◽  
Zhi Gang Zhao ◽  
Ling Jiang ◽  
Xiao Feng Bian ◽  
...  
Keyword(s):  
Phylogenetic Analysis ◽  
Oryza Sativa ◽  
Fine Mapping ◽  
Oryza Sativa L ◽  
Pollen Sterility ◽  
Weedy Rice ◽  
Cultivated Rice

scholarly journals Little White Lies: Pericarp Color Provides Insights into the Origins and Evolution of Southeast Asian Weedy Rice

2016 ◽  
Vol 6 (12) ◽  
pp. 4105-4114 ◽  
Author(s):  
Yongxia Cui ◽  
Beng Kah Song ◽  
Lin-Feng Li ◽  
Ya-Ling Li ◽  
Zhongyun Huang ◽  
...  
Keyword(s):  
Seed Dormancy ◽  
Oryza Sativa L ◽  
Phylogenetic Analyses ◽  
Weedy Rice ◽  
Cultivated Rice ◽  
Seed Shattering ◽  
Pericarp Color ◽  
Functional Alleles ◽  
Red Pericarp ◽  
Rice Domestication

Abstract Weedy rice is a conspecific form of cultivated rice (Oryza sativa L.) that infests rice fields and results in severe crop losses. Weed strains in different world regions appear to have originated multiple times from different domesticated and/or wild rice progenitors. In the case of Malaysian weedy rice, a multiple-origin model has been proposed based on neutral markers and analyses of domestication genes for hull color and seed shattering. Here, we examined variation in pericarp (bran) color and its molecular basis to address how this trait evolved in Malaysian weeds and its possible role in weed adaptation. Functional alleles of the Rc gene confer proanthocyanidin pigmentation of the pericarp, a trait found in most wild and weedy Oryzas and associated with seed dormancy; nonfunctional rc alleles were strongly favored during rice domestication, and most cultivated varieties have nonpigmented pericarps. Phenotypic characterizations of 52 Malaysian weeds revealed that most strains are characterized by the pigmented pericarp; however, some weeds have white pericarps, suggesting close relationships to cultivated rice. Phylogenetic analyses indicate that the Rc haplotypes present in Malaysian weeds likely have at least three distinct origins: wild O. rufipogon, white-pericarp cultivated rice, and red-pericarp cultivated rice. These diverse origins contribute to high Rc nucleotide diversity in the Malaysian weeds. Comparison of Rc allelic distributions with other rice domestication genes suggests that functional Rc alleles may confer particular fitness benefits in weedy rice populations, for example, by conferring seed dormancy. This may promote functional Rc introgression from local wild Oryza populations.

Sign in / Sign up

Export Citation Format

Share Document