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Genetic studies of Solanum sitiens a...

Pertuze, Ricardo Alfredo.

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Genetic studies of Solanum sitiens and hybridization with tomato.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Genetic studies of Solanum sitiens and hybridization with tomato./
作者:	Pertuze, Ricardo Alfredo.
面頁冊數:	112 p.
附註:	Adviser: Roger Chetelat.
Contained By:	Dissertation Abstracts International63-05B.
標題:	Agriculture, General. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3051549
ISBN:	0493662960

Genetic studies of Solanum sitiens and hybridization with tomato.
Pertuze, Ricardo Alfredo.

Genetic studies of Solanum sitiens and hybridization with tomato. - 112 p.

Adviser: Roger Chetelat.

Thesis (Ph.D.)--University of California, Davis, 2002.

This study examined the cytogenetics, crossing relationships, and comparative mapping of <italic>Solanum sitiens</italic> (syn. <italic>S. rickii</italic>). This tomato-like nightshade species is native to the Atacama Desert of northern Chile, and possesses traits, such as extreme drought tolerance, that could be useful to tomato breeders. The genome structure of <italic>S. sitiens</italic> and strategies to transfer its genes to tomato were studied. In order to establish the synteny of the <italic>S. sitiens</italic> genome with that of <italic> Lycopersicon</italic> spp., an interspecific F2 mapping population from a cross between <italic>S. sitiens</italic> and <italic>S. lycopersicoides </italic> was developed. The F1 had high fertility and normal meiosis, indicating a close affinity between these two genomes. An RFLP-based map indicated the ‘lycopersicoides’ complex (<italic>S. sitiens</italic> and <italic> S. lycopersicoides</italic>) genome is colmear with that of tomato and other <italic> Lycopersicon</italic> spp., except for a paracentric inversion on the long arm of chromosome 10. A QTL study of 19 morphological traits that segregated in the mapping population revealed 12 putative QTLs for 8 traits. To study the transmission of <italic>S. sitiens</italic> chromosomes in <italic>L. esculentum</italic>, several types of <italic>L. esculentum</italic> × <italic> S. sitiens</italic> derivatives were produced, including various aneuploids (2x + 1 to 2x + 15) and recombinant diploids. Chromosomal regions introgressed from S. sitiens were identified by molecular marker analysis using RFLPs and isozymes. Meiotic and mitotic cytology was performed to study homeologous pairing, and to determine the number of <italic>S. sitiens</italic> chromosomes transmitted to the progeny. Pollen fertility and compatibility were also evaluated in the progeny. The transfer of individual <italic>S. sitiens</italic> chromosomes into tomato and their recombination with <italic>L. esculentum</italic> homeologous was demonstrated for the first time. However, the low fertility and compatibility of intergeneric hybrids, combined with a low transmission rate of certain chromosomes, prevented a comprehensive introgression of the <italic>S. sitiens </italic> genome into tomato.

ISBN: 0493662960Subjects--Topical Terms:

1017510
Agriculture, General.

Genetic studies of Solanum sitiens and hybridization with tomato.
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245 1 0 $a Genetic studies of Solanum sitiens and hybridization with tomato.
300 $a 112 p.
500 $a Adviser: Roger Chetelat.
500 $a Source: Dissertation Abstracts International, Volume: 63-05, Section: B, page: 2180.
502 $a Thesis (Ph.D.)--University of California, Davis, 2002.
520 $a This study examined the cytogenetics, crossing relationships, and comparative mapping of <italic>Solanum sitiens</italic> (syn. <italic>S. rickii</italic>). This tomato-like nightshade species is native to the Atacama Desert of northern Chile, and possesses traits, such as extreme drought tolerance, that could be useful to tomato breeders. The genome structure of <italic>S. sitiens</italic> and strategies to transfer its genes to tomato were studied. In order to establish the synteny of the <italic>S. sitiens</italic> genome with that of <italic> Lycopersicon</italic> spp., an interspecific F2 mapping population from a cross between <italic>S. sitiens</italic> and <italic>S. lycopersicoides </italic> was developed. The F1 had high fertility and normal meiosis, indicating a close affinity between these two genomes. An RFLP-based map indicated the ‘lycopersicoides’ complex (<italic>S. sitiens</italic> and <italic> S. lycopersicoides</italic>) genome is colmear with that of tomato and other <italic> Lycopersicon</italic> spp., except for a paracentric inversion on the long arm of chromosome 10. A QTL study of 19 morphological traits that segregated in the mapping population revealed 12 putative QTLs for 8 traits. To study the transmission of <italic>S. sitiens</italic> chromosomes in <italic>L. esculentum</italic>, several types of <italic>L. esculentum</italic> × <italic> S. sitiens</italic> derivatives were produced, including various aneuploids (2x + 1 to 2x + 15) and recombinant diploids. Chromosomal regions introgressed from S. sitiens were identified by molecular marker analysis using RFLPs and isozymes. Meiotic and mitotic cytology was performed to study homeologous pairing, and to determine the number of <italic>S. sitiens</italic> chromosomes transmitted to the progeny. Pollen fertility and compatibility were also evaluated in the progeny. The transfer of individual <italic>S. sitiens</italic> chromosomes into tomato and their recombination with <italic>L. esculentum</italic> homeologous was demonstrated for the first time. However, the low fertility and compatibility of intergeneric hybrids, combined with a low transmission rate of certain chromosomes, prevented a comprehensive introgression of the <italic>S. sitiens </italic> genome into tomato.
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