Search Results
You are looking at 11 - 20 of 21 items for :
- Author or Editor: P. Spiegel-Roy x
- HortScience x
Abstract
In examining the adenosine triphosphate (ATP) synthesizing system in seeds, an inhibitory effect of seeds on luciferase activity was detected (4). This study describes possible use of the luciferin-luciferase system for a better definition of the amount of seed traces in grape berries. With growing consumer preference for seedless table grapes and raisins, breeding of stenospermocarpic grape cultivars is of great interest. Stenospermocarpic grapes yield considerably larger seedless berries than parthenocarpic ones, but also often possess seedcoats that develop into hard, stony tissue (2). An objective definition of the amount of seed rudiments would be of considerable value in breeding for seedlessness and in assessing environmental or plant growth regulator effects.
Abstract
In a breeding program for table grapes (Vitis vinifera L.) initiated in 1968 at Bet Dagan, Israel, one objective has been to breed large-berried, better-flavored grape cultivars for replacement of ‘Ribier’ (syn. Alphonse Lavallee). A selection with large black berries has been made and named ‘Nava’ (Fig. 1.). The fruit is well-adapted for the fresh market.
Abstract
‘Samish’ is a high-yielding, semi-hard-shelled, well-sealed, highly flavored cultivar of almond (Prunus amygdalus Batsch), with fairly uniform kernels.
Abstract
A major objective of the grape-breeding program, started in 1968 at Bet Dagan, has been to breed early-ripening and late-ripening table grapes with loose clusters, and good berry size, appearance and quality. Only crosses between Vitis vinifera cultivars have been made. The progeny of a local ‘Dabouki’ × ‘Cardinal’ cross have proven of particular interest and one selection is being named ‘Shani’.
Abstract
In a breeding program for table grapes (Vitis vinifera L.) initiated in 1968 at Bet Dagan, one of the objectives has been to breed late-ripening cultivars. A late-ripening selection from a cross between ‘Dabouki’ and ‘Cal-meria’ has been made and is being named ‘Elul’.
Abstract
In a breeding program for table grapes initiated in 1968 at Bet Dagan, one of the objectives has been to breed late-ripening cultivars of Vitis vinifera. A late-ripening plant selected from a cross of ‘Zeni’ and ‘Toufahi’, made in 1969, is being named ‘Odem’.
Abstract
In a table grape-breeding program initiated in 1968 at Bet Dagan, the progeny of a cross between the local cultivar ‘Dabouki’ and ‘Cardinal’, has proven of special interest and several selections have been made. One selection is being named ‘Sivan’.
Abstract
Nucellar and zygotic offspring of ‘Satsuma’ mandarin (Citrus reticulata Blanco) were differentiated by gas chromatographic analysis of gaseous emanations from fragmented leaves of 6-month-old seedlings. Analysis was rapid (< 3 minutes/sample), could be performed on individual leaves, and required virtually no tissue processing. Thus, the method is amenable to the screening of large progeny at the young seedling stage.
Abstract
Treatment with a 0.5-2% cyanamide (H2NCN) solution for 5 min effectively substituted for chilling in seed of four Vitis vinifera L. cultivars, allowing immediate germination. Treatment could shorten the breeding cycle.
Immature grape embryos from early ripening genotypes of Vitis vinifera were successfully cultured in vitro on Difco orchid agar or a modified White's agar medium. Germination was increased in vitro for five genotypes from 0%, 7%, 11%, 12%, and 16% in vivo to 15%, 24%, 23%, 34%, and 24%, respectively. Subculturing embryos onto liquid culture from seeds that failed to germinate on agar also was possible. Differences in germination rates, as affected by pollen, were significant. This method will allow accelerated development of early ripening cultivars by allowing breeders to use such genotypes as females, as well as males.