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Heterosis and Inbreeding Depression in Diploid and Tetraploid Cottons 1
Author(s) -
Young E. F.,
Murray Jay C.
Publication year - 1966
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/cropsci1966.0011183x000600050013x
Subject(s) - heterosis , biology , inbreeding depression , ploidy , hybrid , inbreeding , botany , genetics , gene , population , demography , sociology
Heterosis was found in both the diploid and tetraploid species of cotton. Of the traits studied, heterosis was most pronounced in yield in both species. The degrees of heterosis shown by G. arboreum were similar to those reported for self‐pollinated diploid species. The G. hirsutum hybrid combinations exhibited less heterosis than the G. arboreum hybrids and were less sensitive to inbreeding. These results indicate that the tetraploid species may carry an accumulation of favorable dominant growth genes in duplicate, a factor which results in a type of built‐in heterosis.