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Morphological variation, distribution and relationship of weedy rice (Oryza sativa L.) in Peninsular Malaysia

The dynamic changes in agricultural practices have negatively impacted rice cultivation resulting in serious weedy rice (Oryza sativa L.) infestations. In this study, field surveys were conducted at six granaries to evaluate the abundance, spatial-distribution patterns, and morphological characteris...

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Main Authors: Mahmod, Intan Filzah, Saiman, Mohd Zuwairi, Mohamed, Zulqarnain, Ishak, Muhammad Nazri, Mispan, Muhamad Shakirin
Format: Article
Published: Wiley 2021
Subjects:
QK Botany
S Agriculture (General)
Online Access:http://eprints.um.edu.my/27986/
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spelling my.um.eprints.279862022-06-28T01:36:37Z http://eprints.um.edu.my/27986/ Morphological variation, distribution and relationship of weedy rice (Oryza sativa L.) in Peninsular Malaysia Mahmod, Intan Filzah Saiman, Mohd Zuwairi Mohamed, Zulqarnain Ishak, Muhammad Nazri Mispan, Muhamad Shakirin QK Botany S Agriculture (General) The dynamic changes in agricultural practices have negatively impacted rice cultivation resulting in serious weedy rice (Oryza sativa L.) infestations. In this study, field surveys were conducted at six granaries to evaluate the abundance, spatial-distribution patterns, and morphological characteristics of weedy rice in Peninsular Malaysia. An average of 5.28 plants/m(2) weedy rice density was recorded, with coverage area that ranged from 29% to 66% and occurrence at >67% frequency. Seed morphological characteristics identified the existence of at least 18 biotypes. A total of 134 weedy rice samples were characterized morphologically, and Principle Component Analysis results showed that these samples are highly diverse and are dispersed across Peninsular Malaysia. These genetically diverse reservoir of weedy rice characteristics present opportunities of exploitation in the future, especially through rice breeding and crop improvement. Weedy rice from Kelantan and Selangor displayed unique clusters in the PCA plot which suggest higher tendencies for environmental adaptation although the influencing factors have yet to be determined. Dispersion studies based on Lloyd patchiness index revealed that more than 50% of surveyed field blocks in five states displayed uniform distribution as opposed to cluster distribution observed in the remaining field blocks. These variations in dispersion suggested that farmers in Peninsular Malaysia employed inconsistent weedy rice management practices in every granary and farm block. Observation of weedy rice infestation pattern via spatial distribution suggested that weed management requires proper coordination of control efforts among farmers to ensure the degree of infestation is maintained under a controlled level. Wiley 2021-06 Article PeerReviewed Mahmod, Intan Filzah and Saiman, Mohd Zuwairi and Mohamed, Zulqarnain and Ishak, Muhammad Nazri and Mispan, Muhamad Shakirin (2021) Morphological variation, distribution and relationship of weedy rice (Oryza sativa L.) in Peninsular Malaysia. Weed Biology and Management, 21 (2). pp. 86-99. ISSN 1444-6162, DOI https://doi.org/10.1111/wbm.12223 <https://doi.org/10.1111/wbm.12223>. 10.1111/wbm.12223
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic QK Botany
S Agriculture (General)
spellingShingle QK Botany
S Agriculture (General)
Mahmod, Intan Filzah
Saiman, Mohd Zuwairi
Mohamed, Zulqarnain
Ishak, Muhammad Nazri
Mispan, Muhamad Shakirin
Morphological variation, distribution and relationship of weedy rice (Oryza sativa L.) in Peninsular Malaysia
description The dynamic changes in agricultural practices have negatively impacted rice cultivation resulting in serious weedy rice (Oryza sativa L.) infestations. In this study, field surveys were conducted at six granaries to evaluate the abundance, spatial-distribution patterns, and morphological characteristics of weedy rice in Peninsular Malaysia. An average of 5.28 plants/m(2) weedy rice density was recorded, with coverage area that ranged from 29% to 66% and occurrence at >67% frequency. Seed morphological characteristics identified the existence of at least 18 biotypes. A total of 134 weedy rice samples were characterized morphologically, and Principle Component Analysis results showed that these samples are highly diverse and are dispersed across Peninsular Malaysia. These genetically diverse reservoir of weedy rice characteristics present opportunities of exploitation in the future, especially through rice breeding and crop improvement. Weedy rice from Kelantan and Selangor displayed unique clusters in the PCA plot which suggest higher tendencies for environmental adaptation although the influencing factors have yet to be determined. Dispersion studies based on Lloyd patchiness index revealed that more than 50% of surveyed field blocks in five states displayed uniform distribution as opposed to cluster distribution observed in the remaining field blocks. These variations in dispersion suggested that farmers in Peninsular Malaysia employed inconsistent weedy rice management practices in every granary and farm block. Observation of weedy rice infestation pattern via spatial distribution suggested that weed management requires proper coordination of control efforts among farmers to ensure the degree of infestation is maintained under a controlled level.
format Article
author Mahmod, Intan Filzah
Saiman, Mohd Zuwairi
Mohamed, Zulqarnain
Ishak, Muhammad Nazri
Mispan, Muhamad Shakirin
author_facet Mahmod, Intan Filzah
Saiman, Mohd Zuwairi
Mohamed, Zulqarnain
Ishak, Muhammad Nazri
Mispan, Muhamad Shakirin
author_sort Mahmod, Intan Filzah
title Morphological variation, distribution and relationship of weedy rice (Oryza sativa L.) in Peninsular Malaysia
title_short Morphological variation, distribution and relationship of weedy rice (Oryza sativa L.) in Peninsular Malaysia
title_full Morphological variation, distribution and relationship of weedy rice (Oryza sativa L.) in Peninsular Malaysia
title_fullStr Morphological variation, distribution and relationship of weedy rice (Oryza sativa L.) in Peninsular Malaysia
title_full_unstemmed Morphological variation, distribution and relationship of weedy rice (Oryza sativa L.) in Peninsular Malaysia
title_sort morphological variation, distribution and relationship of weedy rice (oryza sativa l.) in peninsular malaysia
publisher Wiley
publishDate 2021
url http://eprints.um.edu.my/27986/
_version_ 1738510684347432960
score 13.211869

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