Open AccessHAPLOID SELECTION FOR LOW TEMPERATURE TOLERANCE OF TOMATO POLLEN
Author(s) -
Daniel Zamir,
Steven D. Tanksley,
Richard A. Jones
Publication year - 1982
Publication title -
genetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.792
H-Index - 246
eISSN - 1943-2631
pISSN - 0016-6731
DOI - 10.1093/genetics/101.1.129
Subject(s) - lycopersicon , biology , pollen , ploidy , botany , allele , chromosome , interspecific competition , isozyme , gene , genetics , enzyme , biochemistry
Pollen grains were harvested from an interspecific F(1) hybrid between the cultivated tomato, Lycopersicon esculentum Mill., and its wild relative Lycopersicon hirsutum Humb. & Bonpl., a low temperature tolerant accession originating from an altitude of 3200 m in the Peruvian Andes. The two species differ for electrophoretically-detectable loci that mark six (possibly seven) of the 12 tomato chromosomes. Isozyme analysis of the BC(1) populations derived from controlled pollinations at normal and low temperatures indicates a significant skewing of allelic frequencies favoring two independent chromosome segments of L. hirsutum at low temperatures. The results demonstrate that gametophytic selection for low temperature tolerance of tomato pollen is determined, at least in part, by genes expressed in the haploid pollen.