Articles
SOME ASPECTS OF SEED QUALITY IN RELATION TO ROOT-WEIGHT UNIFORMITY IN CARROT
Article number
198_19
Pages
157 – 162
Language
Abstract
Variability in carrot root weight at harvest is influenced by variation in the size of the embryos.
This variation is greater in seeds from secondary than primary umbels, and in seeds from crops grown at low (10 plants m-2) than high (80 plants m-2) plant densities, especially for seed harvests made before all the umbels have turned brown.
Variation in embryo length is not influenced by the genetic constitution of the seed.
It is estimated that about 70% of seed lots in commerce have a coefficient of variation (C.V.) of embryo length between 20–30% but about 30% have a C.V. higher than this and consequently give substantially greater root-weight variation.
This variation is greater in seeds from secondary than primary umbels, and in seeds from crops grown at low (10 plants m-2) than high (80 plants m-2) plant densities, especially for seed harvests made before all the umbels have turned brown.
Variation in embryo length is not influenced by the genetic constitution of the seed.
It is estimated that about 70% of seed lots in commerce have a coefficient of variation (C.V.) of embryo length between 20–30% but about 30% have a C.V. higher than this and consequently give substantially greater root-weight variation.
Authors
D. Gray
Keywords
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