Articles
Genotype-phenotype correlations of Solanum lycopersicum core-collection of BRGV Buzau, Romania
Article number
1439_73
Pages
547 – 554
Language
English
Abstract
Solanum lycopersicum is one of the vegetable species that presents the largest variety of fruit shapes and colors, but also multiple morphotypes in terms of the leaf shape or plant type of growth.
BRGV Buzau owns over 4000 tomato lines with distinct phenotypic expressiveness, a fact that led the research team to identify certain dominant or recessive genes responsible for the manifestation of one or more phenotypic characters.
Using both the chromosomal map of the Solanum lycopersicum species and the specialized literature and correlating with the measurable and qualitative data collected during the study from several 40 lines from the germplasm tomato collection, interdependent relationships between genotype and phenotype were identified.
The analyzed lines demonstrated phenotypic plasticity throughout the study, with genes that influence the color or shape of the fruit being identified.
The color of the epidermis is controlled by the recessive gene yy- clearskin tomato or the dominant gene Y+ – yellow epidermis. The combination of the transparent or yellow epidermis and the color of the endocarp determines the color of the fruit.
Bicolor fruits are the result of the characters manifested by a mutant allele of the R gene, namely ry that disperses the carotenoid pigments and results in bicolor yellow+red (ryry) or red+green (ryry; gfgf) fruits.
Regarding leaf shape, the recessive gene c is responsible for the appearance of potato-type leaves and the dominant gene C shows normal leaves.
The leaves with anthocyanin coloring are the result of the combination of aft-anthocyanin fruit and atv-atroviolaceum genes.
The gene pool deciphered by the present study is characterized by polymorphism and biodiversity and constitutes a vital resource in breeding and hybridization works to obtain new tomato varieties and hybrids with specific uses.
BRGV Buzau owns over 4000 tomato lines with distinct phenotypic expressiveness, a fact that led the research team to identify certain dominant or recessive genes responsible for the manifestation of one or more phenotypic characters.
Using both the chromosomal map of the Solanum lycopersicum species and the specialized literature and correlating with the measurable and qualitative data collected during the study from several 40 lines from the germplasm tomato collection, interdependent relationships between genotype and phenotype were identified.
The analyzed lines demonstrated phenotypic plasticity throughout the study, with genes that influence the color or shape of the fruit being identified.
The color of the epidermis is controlled by the recessive gene yy- clearskin tomato or the dominant gene Y+ – yellow epidermis. The combination of the transparent or yellow epidermis and the color of the endocarp determines the color of the fruit.
Bicolor fruits are the result of the characters manifested by a mutant allele of the R gene, namely ry that disperses the carotenoid pigments and results in bicolor yellow+red (ryry) or red+green (ryry; gfgf) fruits.
Regarding leaf shape, the recessive gene c is responsible for the appearance of potato-type leaves and the dominant gene C shows normal leaves.
The leaves with anthocyanin coloring are the result of the combination of aft-anthocyanin fruit and atv-atroviolaceum genes.
The gene pool deciphered by the present study is characterized by polymorphism and biodiversity and constitutes a vital resource in breeding and hybridization works to obtain new tomato varieties and hybrids with specific uses.
Authors
B. Mușat, C. Vînătoru, M. Popescu, C. Bratu, G. Negoșanu, F. Burlan, C. Şomoiag
Keywords
polymorphism, distinctiveness, gene pool, phenotypical plasticity, recessive allele
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