Factors Affecting the Production of a BC_1F_1 Population and Characterization of the BC_1F_1 Progenies Obtained from the Interspecific Crosses between a Cultivated Tomato and the peruvianum-complex

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The present study was conducted to evaluate the factors(e.g.cultivar(V), wild species line(L), year(Y)and their interactions)affecting the production of a BC_1F_1 population(cultivar × F_1(cultivar × 'peruvianum-complex')), a breeding strategy for using many cultivars as pistillate parents for the production of a BC_1F_1 population and for the segregation of some characteristics such as sweet aroma of leaf, morphological traits and self-incompatibility in the BC_1F_1 population. Ovule selection and culture method was used for the production of progenies. The interaction between the cultivar and the wild species line(V×L)was found to be significant. Differences in the number of GOFs(Germinated Ovules per Fruit)among 19 tomato cultivars crossed with F_1(cultivar × L.peruvianum LA1554)were significant. Differences in the number of GOFs among wild species lines(as F_1 pollen parents)were also significant and much more pronounced than those of the cultivars. Significant variation was observed within-year and affected the interaction(V × Y)which was variable. The present study suggests that the probability of obtaining a stable, consistent average number of GOFs is high for the production of a BC_1F_1 population if many cultivars are used at a time as seed parents. The segregation of some characteristics in the BC_1F_1 population was evaluated. Most of the morphological traits resembled those of the wild species parents. Thirty six percent of the BC_1F_1 population inherited self-compatibility from the L.esculentum parent. A sensory panel composed of 8 members evaluated the leaf aroma of 100 BC_1F_1 plants(19 cultivars × F_1 derived from LA1554)and two BC_1F_1 plants were found to have the same sweet aroma as the F_1 (pollen parent). In the present study a large BC_1F_1 population with an expected number of plants was obtained. Sensory attributes of some BC_1F_1 plants suggested that the expected quantitative trait had successfully been introduced into the BC_1F_1 population.
日本育種学会の論文

Factors Affecting the Production of a BC_1F_1 Population and Characterization of the BC_1F_1 Progenies Obtained from the Interspecific Crosses between a Cultivated Tomato and the peruvianum-complex

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