ÃÞ »¨ ѧ ±¨ Cotton Science 2009£¬21(5)£º410-414
Heterosis of Three-way Cross Interspecific Hybrids (Gossypium hirsutum¡ÁG.barbadense) Based on Cytoplasmic Male-sterility System Abstract£ºIn order to utilize heterosis of interspecific hybrid cotton between Gossypium barbadense and G. hirsutum and increase its hybrid seed yield, 10 three-way cross hybrids and 4 single cross hybrids were produced using cytoplasmic male sterile, maintainer and restorer lines in G. barbadense and G. hirsutum , and were evaluated in a Randomized Complete Block Design with three replications during 2005-2006 at Zhejiang University Farm. The results showed that the cotton yield of three -way cross hybrids was very significant higher than that of single cross hybrids in G. barbadense , and similar with single cross hybrids between G. barbadense and G. hirsutum , but lower than single cross hybrids in G. hirsutum . For the cotton fiber quality, three-way cross hybrids were not only better than single cross hybrids in G. hirsutum but also had a same level to single cross hybrids between G. barbadense and G. hirsutum . Especially, three-way crossing was able to produce higher hybrid seed yield than single crossing in G. barbadense although was not in G. hirsutum . It is suggested that early mature sterile lines in G. barbadense , high lint percentage and boll weight maintainer and restorer lines in G. hirsutum , and with relative uniformity in plant shape using as parents might be considered in the breeding program of three way cross hybrid.
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