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GrainGenes Reference Report: AFF-13-170

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Reference	AFF-13-170
Title	Alterations in growth and canopy architecture among dwarf, semidwarf and tall oat lines grown under northern conditions
Journal	Agricultural and Food Science
Year	2004
Volume	13
Pages	170-185
Author	Makela P Muurinen S Peltonen-Sainio P
Abstract	The Finnish growing season is particularly short, with an intensive growth period, unfavourable rainfall distribution and frequently occurring fluctuations in climate that affect crop growth and yield formation. A three-year (1999, 2000 and 2001) study was conducted in Helsinki, Finland, to determine the contribution of alterations in canopy structure, tillering and stem elongation among dwarf (D), semidwarf (SD) and tall (T) oat ( Avena sativa ) lines to yield formation. Yield components, leaf characteristics and straw traits were measured from six oat lines (D lines Pal and Grane, SD lines Hja 76416 and Salo, and T lines Veli and Jalostettu maatiainen) separately on the main shoot and tillers. Long leaf area duration and high leaf area index were associated with increased grain yield probably due to more persistent and active assimilation. Also, higher number of leaves increased the grain yield. Higher peduncle, straw and node weights associating with increased grain yield may result from more abundant assimilate reserves; however, the longer the straw and peduncle, the lower the grain yield, which may result from increased lodging of SD and T lines. The traits contributing most to the grain yield varied greatly from year to year. No single dominant trait determined grain yield, since yield is a product of several different traits. SD lines seemed to be most promising for further breeding programmes on the basis of their growth pattern and yielding ability
Keyword	assimilation [ Show all 23 ]

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