ISSN:
1573-5060
Keywords:
grapes
;
interspecific barriers
;
interspecific hybridization
;
reproductive efficiency
;
incongruity
;
Vitis spp.
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary F1 progeny from three classes of crosses were studied for indications of incongruity in the form of reproductive dysfunction. Percent fruit set was found to be approximately equivalent to the additive inverse of percent aborted flowers, as the effect of shot berries was small and not significant. In interspecific crosses, barriers were manifested as reduced fruit set and seed number per berry. These two characters were used to create an index of reproductive efficiency. Nine F1s from crosses of most divergent class, V. riparia × V. vinifera (R × V), displayed significantly tower reproductive efficiency, percent fruit set, and seed number per berry. Four female F1s from the least divergent class, V. riparia × V. riparia (R × R), had the highest reproductive efficiency, percent fruit set and seed number per berry, when pollinated by two V. riparia pollen sources. Seventeen F1s from the highly-intercrossed class, V. riparia × French Hybrid (R × FH), displayed intermediate levels of reproductive efficiency, percent fruit set, and seed number per berry. The R × FH class involved V. vinifera, V. rupestris, V. aestivalis, V. labrusca, V. berlandieri, V. cinerea, and V. riparia. It is proposed that the complex intercrossing in the pedigrees of the R × FH class ameliorated incongruity. In the most divergent class, R × V, progenies of one of the V. riparia parents displayed fewer incongruity effects than progenies of the other V. riparia parents. Progeny testing of many proposed parental combinations may be used to uncover useful congruent combinations.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00021412
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