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Inheritance of Isocitratase Activity and Its Relationship to Seedling Vigor in a Cross of Upland Cotton 1
Author(s) -
Scholl R. L.
Publication year - 1974
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1974.0011183x001400020038x
Subject(s) - seedling , germination , biology , backcrossing , reciprocal cross , hybrid , population , extranuclear inheritance , horticulture , gossypium hirsutum , agronomy , botany , genetics , demography , sociology , mitochondrial dna , gene
Seedlings of reciprocal F 1 , reciprocal backcross, and advanced generations of a biparental cross of Upland cotton ( Gossypium hirsutum L.) were examined for isocitratase activity and axial fresh weight after 40 to 112 hours of germination. Results from reciprocal hybrids after 40 and 112 hours of germination indicated that level of isocitratase activity and axial growth rate were maternally inherited, but there was no evidence of cytoplasmic inheritance. Wide segregation for isocitratase activity was observed in the F 2 population after 40 and 112 hours of germination, and isocitratase activity appeared to be quantitatively inherited. In the Fz population, relative isocitratase activity of seedlings germinated 40 hours was highly correlated with the percent of seedling fresh weight in the axis (r=+0.843**). The association between the same two characters was small but negative for seedlings germinated 112 hours (r=−0.431**). The strength of the association between isocitratase activity and axial growth early in germination suggests that isocitratase activity may be a good indicator of early seedling vigor.