scholarly journals Multiple Loci and Epistases Control Genetic Variation for Seed Dormancy in Weedy Rice (Oryza sativa)

Genetics ◽  
2004 ◽  
Vol 166 (3) ◽  
pp. 1503-1516 ◽  
Author(s):  
Xing-You Gu ◽  
Shahryar F. Kianian ◽  
Michael E. Foley
Keyword(s):  
Genetic Variation ◽  
Oryza Sativa ◽  
Seed Dormancy ◽  
Weedy Rice ◽  
Multiple Loci

Genetic analysis of adaptive syndromes interrelated with seed dormancy in weedy rice (Oryza sativa)

2005 ◽  
Vol 110 (6) ◽  
pp. 1108-1118 ◽  
Author(s):  
Xing-You Gu ◽  
Shahryar F. Kianian ◽  
Gary A. Hareland ◽  
Barry L. Hoffer ◽  
Michael E. Foley
Keyword(s):  
Oryza Sativa ◽  
Genetic Analysis ◽  
Seed Dormancy ◽  
Weedy Rice

scholarly journals Comparative Mapping of Seed Dormancy Loci Between Tropical and Temperate Ecotypes of Weedy Rice (Oryza sativa L.)

2017 ◽  
Vol 7 (8) ◽  
pp. 2605-2614 ◽  
Author(s):  
Lihua Zhang ◽  
Jieqiong Lou ◽  
Michael E. Foley ◽  
Xing-You Gu
Keyword(s):  
Oryza Sativa ◽  
Seed Dormancy ◽  
Comparative Mapping ◽  
Oryza Sativa L ◽  
Weedy Rice

scholarly journals Genetic Dissection of Seed Dormancy in Rice (Oryza sativa L.) by Using Two Mapping Populations Derived from Common Parents

Rice ◽  
2020 ◽  
Vol 13 (1) ◽  
Author(s):  
Chaopu Zhang ◽  
Zhiyang Yuan ◽  
Yuntong Wang ◽  
Wenqiang Sun ◽  
Xinxin Tang ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Seed Dormancy ◽  
Oryza Sativa L ◽  
Genetic Dissection ◽  
Mapping Populations

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.

scholarly journals Physiological and Biochemical Responses of Ageratum conyzoides, Oryza sativa f. spontanea (Weedy Rice) and Cyperus iria to Parthenium hysterophorus Methanol Extract

Plants ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1205
Author(s):  
Mst. Motmainna ◽  
Abdul Shukor Juraimi ◽  
Md. Kamal Uddin ◽  
Norhayu Binti Asib ◽  
A. K. M. Mominul Islam ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Methanol Extract ◽  
Parthenium Hysterophorus ◽  
Carotenoid Content ◽  
Weedy Rice ◽  
Ageratum Conyzoides ◽  
Test Species ◽  
Biochemical Responses ◽  
Glasshouse Condition ◽  
Physiological And Biochemical

The current study was designed to investigate the effect of Parthenium hysterophorus L. methanol extract on Ageratum conyzoides L., Oryza sativa f. spontanea (weedy rice) and Cyperus iria L. in glasshouse condition. Here, Parthenium hysterophorus methanol extract at 20, 40, and 60 g L−1 concentrations was applied on the test species to examine their physiological and biochemical responses at 6, 24, 48 and 72 h after spraying (HAS). The phytotoxicity of P. hysterophorus was strong on A. conyzoides compared to weedy rice and Cyperus iria at different concentrations and exposure times. There was a reduction in photosynthesis rate, stomatal conductance, transpiration, chlorophyll content and carotenoid content when plants were treated with P. hysterophorus extract concentrations. Exposure to P. hysterophorus (60 g L−1) at 24 HAS increased malondialdehyde (MDA) and proline content by 152% and 130%, respectively, in A. conyzoides compared with control. The activities of antioxidant enzymes (superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD)) were also increased in the presence of P. hysterophorus extract. Present findings confirm that the methanol extract of P. hysterophorus can disrupt the physiological and biochemical mechanism of target weeds and could be used as an alternative to chemical herbicides.

Weedy Rice Diversity in Southern Brazil

Weed Science ◽  
2021 ◽  
pp. 1-37
Author(s):  
Leonard Bonilla Piveta ◽  
José Alberto Noldin ◽  
Nilda Roma-Burgos ◽  
Vívian Ebeling Viana ◽  
Lariza Benedetti ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Flowering Time ◽  
Weed Management ◽  
Phenotypic Diversity ◽  
Weedy Rice ◽  
Phenotypic Traits ◽  
Southern Brazil ◽  
Variable Response ◽  
Cultivated Rice ◽  
Flowering Synchrony

Abstract Weedy rice (Oryza sativa L.) is one of the most troublesome weeds affecting rice (Oryza sativa L.) production in many countries. Weedy rice control is difficult in rice fields because the weed and crop are phenotypically and morphologically similar. Weedy rice can be a source of genetic diversity to cultivated rice. Thus, this study aimed to characterize the morphological diversity of weedy rice in Southern Brazil. Qualitative and quantitative traits of 249 accessions from eight rice growing mesoregions in Rio Grande do Sul (RS) and Santa Catarina (SC) states were analyzed. For each accession, 24 morphological descriptors (14 qualitative and 10 quantitative) were evaluated. All the 249 accessions from RS and SC are of indica lineage. Considering all the phenotypic traits evaluated, the accessions separated into 14 distinct groups. One of the largest groups consisted of plants that were predominantly tall and with green leaves, intermediate shattering, and variable in flowering time. Distinct subgroups exist within larger clusters, showing discernable phenotypic diversity within the main clusters. The variability in flowering time was high (77 to 110 d after emergence), indicating high potential for flowering synchrony with rice cultivars and, consequently, gene flow. This indicates the need to remove escapes when planting herbicide-resistant rice. Thus, weedy rice populations in Southern Brazil are highly diverse and this diversity could result in variable response to weed management.

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

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
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