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Mechanical Separation of Hybrid and Self‐Pollinated Seed as a Means of Increasing Percentage Hybrids in Upland Cotton 1
Author(s) -
Justus Norman
Publication year - 1964
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/cropsci1964.0011183x000400020011x
Subject(s) - hybrid , crop , biology , library science , division (mathematics) , agriculture , citation , agricultural science , agronomy , mathematics , computer science , arithmetic , ecology
Percentage Hybrids in Upland Cotton' Norman Justus HYBRID vigor has been utilized extensively in many crops, but a method is not currently available for large-scale production of cottonseed consisting of a high percentage of Fj hybrids. Cotton has a perfect flower which makes production of large quantities of Fx hybrid cottonseed difficult. Also, cotton pollen is not wind-borne and must be carried from flower to flower by insects. Simpson (9) reported that the percentage of natural crossing at various locations in the Cotton Belt ranged from 7 to 49% for 1948-52. Loden and Richmond (4) reviewed reports of hybrid vigor in cotton and indicated that many agronomically desirable characters of cotton, including yield of seedcotton, exhibit heterosis. Cotton geneticists have tried to develop a workable method of utilizing male-sterility to produce hybrid cotton, but no successful method has been reported in the literature. Kohel and Richmond (3) reported that lint yield reduction on male-sterile plants in a natural-crossing block