Perbandingan morfologi dan kepelbagaian genetik varian-varian padi (oryza sativa complex) di jelapang padi Pulau Pinang

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dc.contributor.authorPMD Hussain, Zainudin
dc.date.accessioned2015-07-31T00:31:42Z
dc.date.available2015-07-31T00:31:42Z
dc.date.issued2010
dc.description.abstractMany rice variants can be found in many direct-seeded rice fields. These weedy rice variants possess similar morphological characteristics to cultivated rice varieties, making them more difficult to control as compared to other weeds. A comparative morphological study was conducted by collecting weedy rice variants from the four sites within the Penang rice growing areas. The objective of this study was to compare the 17 identified morphometric characteristics and DNA of commercial varieties. 36 different variants were indentified based on plant height, flag leaf length and maturation days. Observation were also included 4 commercial variety sampled from the location, 4 set purified seed commercial varieties from MARDI and one wild rice varieties ( 0. rujipogon). The PCA analyses of morphometric showed that 45.88% variation of weedy rice variants and commercial varieties were observed within the three axis. The first axis accounted for 20.63 % of the variation and was characterised by 1000 grain weight, number of filled grain, number of empty grain, leaf width, plant erectness and leaf pubescence. Second and third axis showed 13.78 % and 10.16 % matrixs' diffences respectively. STRUCTURE analysis suggested that the most likely number of cluster (K) for 45 the variants in this study was equal to eighteen. Based on pairwise FsT values, Commercial varieties MR 219 were group together with some proportion of individual from PP I weedy rice variants. Cluster 8 was exclusively consisted of SGN 4 individuals (weedy rice variants), meanwhile wild rice and variants with awn seed were grouped together in duster 11. Weedy rice variants such as PB 6, PP 2 and SGA 5 had the highest number of tillers, longer panicle length, cuhns height and leaf length compared to commercial rice. However, grain size of commercial varieties was slightly longer and the chlorophylls content at 60-70 DAS was higher than other rice variants. Morphological characters and genomic analyses were able to distinguish all the 45 variants used in the study.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/1075
dc.language.isootheren_US
dc.subjectKepelbagaian genetiken_US
dc.subjectPadi (oryza sativa complex)en_US
dc.subjectJelapang padi Pulau Pinangen_US
dc.titlePerbandingan morfologi dan kepelbagaian genetik varian-varian padi (oryza sativa complex) di jelapang padi Pulau Pinangen_US
dc.typeThesisen_US
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