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Findings from United States Department of Agriculture Update Knowledge of Plant Physiology (Phenotypic and Transcriptional Analysis of Divergently...

July 15, 2014



Findings from United States Department of Agriculture Update Knowledge of Plant Physiology (Phenotypic and Transcriptional Analysis of Divergently Selected Maize Populations Reveals the Role of Developmental Timing in Seed Size Determination)

By a News Reporter-Staff News Editor at Life Science Weekly -- Current study results on Life Science Research have been published. According to news reporting out of Ames, Iowa, by NewsRx editors, research stated, "Seed size is a component of grain yield and an important trait in crop domestication. To understand the mechanisms governing seed size in maize (Zea mays), we examined transcriptional and developmental changes during seed development in populations divergently selected for large and small seed size from Krug, a yellow dent maize cultivar."

Our news journalists obtained a quote from the research from the United States Department of Agriculture, "After 30 cycles of selection, seeds of the large seed population (KLS30) have a 4.7-fold greater weight and a 2.6-fold larger size compared with the small seed population (KSS30). Patterns of seed weight accumulation from the time of pollination through 30 d of grain filling showed an earlier onset, slower rate, and earlier termination of grain filling in KSS30 relative to KLS30. This was further supported by transcriptome patterns in seeds from the populations and derived inbreds. Although the onset of key genes was earlier in small seeds, similar maximum transcription levels were observed in large seeds at later stages, suggesting that functionally weaker alleles, rather than transcript abundance, may be the basis of the slow rate of seed filling in KSS30."

According to the news editors, the research concluded: "Gene coexpression networks identified several known genes controlling cellularization and proliferation as well as novel genes that will be useful candidates for biotechnological approaches aimed at altering seed size in maize and other cereals."

For more information on this research see: Phenotypic and Transcriptional Analysis of Divergently Selected Maize Populations Reveals the Role of Developmental Timing in Seed Size Determination. Plant Physiology, 2014;165(2):658-669. Plant Physiology can be contacted at: Amer Soc Plant Biologists, 15501 Monona Drive, Rockville, MD 20855, USA. (Elsevier - www.elsevier.com; Plant Physiology - www.elsevier.com/wps/product/cws_home/600784)

Our news journalists report that additional information may be obtained by contacting R.S. Sekhon, Dept. of Agriculture ARS, Corn Insects & Crop Genet Res Unit, Ames, IA 50011, United States. Additional authors for this research include C.N. Hirsch, K.L. Childs, M.W. Breitzman, P. Kell, S. Duvick, E.P. Spalding, C.R. Buell, N. de Leon and S.M. Kaeppler (see also Life Science Research).

Keywords for this news article include: Ames, Iowa, United States, Life Science Research, North and Central America

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Life Science Weekly


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