Cytoplasmic Influences Concerning Hybrid Cotton

Lyndon Schoenhals and John R. Gannaway


 
ABSTRACT

The long process of producing a sterile 'Al - line for hybrid production has prompted the need to develop a method for predicting the performance of a sterile cytoplasm hybrid. The combining ability and potential hybrid vigor of cotton cultivars might be determined by crossing into the fertile cytoplasm and assuming the results will be similar to those obtained utilizing sterile cytoplasm.

Six paired 'A' and 'B' - lines and six 'R' - lines of diverse origin from across the Cotton Belt were hand crossed to produce 36 paired F1 hybrids that were grown out in 1984, 1985, and 1986. White bloom counts were recorded daily and open bolls were harvested on a periodic basis. The fiber analysis was performed at the Texas Tech Textile Research Center. These data were averaged to determine similarities or differences for yield, white bloom counts, lint percent, boll size, earliness boll set percent and fiber properties.

Fifteen of the thirty-six hybrid pairs produced yields using the sterile cytoplasm hybrid that were within plus or minus 10% of the fertile cytoplasm hybrid. The data for lint percent, boll size, and earliness were similar for the 'B' X 'R' hybrid and its corresponding 'A' X 'R' hybrid. Some exceptions that did not show similar results in yields were also different for total white blooms, bloom rate index, and boll set percent. The micronaire, fiber strength, and fiber length were similar for the paired hybrids.



Reprinted from 1988 Proceedings: Beltwide Cotton Production Research Conferences pg. 98
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998