Effects of Photoperiod and Maturity Genes on Plant Growth, Partitioning, Radiation Use Efficiency, and Yield in Soyabean [Glycine max(L.) Merrill] ‘Clark’

Plants of four isolines of soyabean [Glycine max(L.) Merrill] ‘Clark’, viz‘L71-920’ (maturity gene complemente1e2e3 ), ‘L80-5914’ (E1e2e3), ‘Clark’ (e1E2E3), and ‘L65-3366’ (E1E2E3), were grown in short (12.25hd−1natural light) and long days (12.25hd−1natural light supplemented with 2.75hd−1low-irra...

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Bibliographic Details
Published in:Annals of botany 2000-03, Vol.85 (3), p.335-343
Main Authors: Ellis, R.H., Asumadu, H., Qi, A., Summerfield, R.J.
Format: Article
Language:English
Subjects:
Alleles
Biomass production
Crop harvesting
crop yield
cultivars
dry matter partitioning
Energy crops
Flowering
Glycine max
Glycine max(L.) Merrill
Glycine max(L.) Merrill, soyabean, maturity genes, flowering, phenology, growth, yield
growth
harvest index
leaf area index
leaves
maturity genes
maturity groups
phenology
Photoperiod
Plant growth
Plants
Seed productivity
solar radiation
soyabean
yield
Yield to maturity
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Summary:Plants of four isolines of soyabean [Glycine max(L.) Merrill] ‘Clark’, viz‘L71-920’ (maturity gene complemente1e2e3 ), ‘L80-5914’ (E1e2e3), ‘Clark’ (e1E2E3), and ‘L65-3366’ (E1E2E3), were grown in short (12.25hd−1natural light) and long days (12.25hd−1natural light supplemented with 2.75hd−1low-irradiance artificial light) from first flowering to maturity in a polythene tunnel maintained at 30/24°C (day/night). Whereas there were few differences among the isolines grown in short days, in long days the dominant alleles increased crop duration, biomass and seed yield substantially. Increases in biological and economic yield were not solely a consequence of longer crop duration: the dominant alleles also increased crop growth rate and radiation use efficiency in long days (from 1.3 g MJ−1total radiation ine1e2e3 to 2.8gMJ−1inE1E2E3 ). Greater radiation use efficiency resulted from a relatively longer leaf area duration, better distribution and orientation of a larger mass of leaves within the canopy, and smaller partitioning of assimilates to reproductive structures. The work reveals the substantial effects of the three lociE1 / e1, E2/ e2and E3/e3 on the response of plant growth, as well as development, to environment. Their relevance to crop adaptation is discussed.
ISSN:0305-7364
1095-8290
DOI:10.1006/anbo.1999.1072