Potential for increasing early vigour and total biomass in spring wheat, 2. Characteristics associated with early vigour
1992
Regan, K.L. | Turner, N.C. (Commonwealth Scientific and Industrial Research Organisation, Canberra (Australia). Div. of Plant Industry) | Siddique, K.H.M. | Whan, B.R. (Western Australian Dept. of Agriculture, South Perth. Div. of Plant Industries)
Characteristics associated with early vigour in 5 introduced lines and 10 Australian cultivars were examined in a field study at Wongan Hills in Western Australia. Differences in dry matter production were observed at all sampling times during the season, with 3 of the introduced lines having consistently higher dry matter production than the standard cultivars during the early growth period. Those genotypes with a higher dry matter production at 54 days after sowing had higher relative growth rates and green area indices than those with low dry matter production. Both genotypes with large leaves on few tillers and genotypes with small leaves on many tillers had higher green area indices and higher dry matter production. While high dry matter production was associated with a large degree of ground cover and high light interception, it was not associated with the earlier commencement of reproductive development. Incorporation of early vigour and high dry matter production into locally adapted cultivars is required to demonstrate its benefit in these environments.
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