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To examine the effect of stigma position and size on seed productivity through pollination efficiency in radish, the numbers of self and cross pollen grains on the stigmas and the seed productivity under insect-pollination were compared among four bred lines. Lines with a small stigma or a high stigma relative to the anthers on long stamens tended to receive fewer self and total (self + cross) pollen...
We performed artificial self-pollination throughout the period of sexual reproduction in six inbred lines of Brassica rapa, a plant with sporophytic self-incompatibility (SI). The level of SI changed between each pollination date in all lines, suggesting the effects of both internal and external factors. To further investigate the potential factors affecting the changes in the level of SI, multiple...
We made a 5 × 5 diallel set of crosses between five inbred lines, four Japanese and one Chinese, and diallel analyses of radish floral morphology were conducted to estimate the genetic parameters underlying 13 floral traits. The modes of inheritance of 12 traits (but not anther length on the long stamen) followed the additive-dominance model. Broad-sense heritabilities of the 12 traits were 0.93–0...
We investigated variation in floral morphology among 36 accessions of radish (Raphanus sativus L.). We found wide, continuous inter-accession variation in 15 traits related to the size of the floral organs and the stigma position relative to the anthers of long stamens. A principal-component analysis of the 15 floral traits also showed wide variation among accessions. A large proportion of this variation...
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