Received: 18-01-2017
Accepted: 13-03-2017
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Morphology and Anatomy Characteristics of Rice Line DCG66 Harboring Chromosome Segment from Japonica Asominori in Indica IR24 Genetic Background
,
Nguyen Van Hoan
2
,
Pham Van Cuong
2, 3
Keywords
Chromosome segment substitution line, morphological and anatomical characteristics, vascular bundle
Abstract
A pot-experiment was conducted using completely randomized design (CRD) with 5 replications in green house at Faculty of Agronomy, Vietnam National University of Agriculture in autumn season 2016 to evaluate morphological and anatomical characteristics of DCG66 line that caries a chromosome segment substitution from cv. Asominori. Experiment used four entries: cv. Asominori (Subsp. Japonica), cv. IR24 variety (subsp. Indica), IAS66 line - a chromosome segment substitution line (CSSL) derived from IR24 and Asominori cross at BC2F3 generation, and DCG66 line - chromosome segment substitution line seleclted from IAS66 at BC2F8 generation. At heading stage, 5 plants per entry were randomly selected to measure morphological and anatomical characteristics of root, basal internode, panicle internode and flag leaf. At maturing stage, 5 plants/replication were selected to measure yield components and individual yield. The results showed that DCG66 outyielded by 11.5% compared to IR24, 53.5% to Asominori and 29.1% to IAS66 because of large spikelet/panicle. The stem internode diameter, root volume, total of root surface area, number of flag leaf vascular bundles were higher in DCG66 than other entries. There was a positive correlation between number of vascular bundles in panicle and yield components and individual yield at all of research varieties.
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