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Estimates of genotypic and environmental variances and covariances in Upland cotton and their implications in selection



Estimates of genotypic and environmental variances and covariances in Upland cotton and their implications in selection



Agron Jour 50(3): 126-131



Each of three populations of F4 and F5 lines of Upland cotton were grown in several different environments. Plot error or environmental variances were large for lint yield, bolls per plant, seed per boll, and boll weight; small for lint percentage, seed and lint index, and fiber length, strength, and fineness. Genotypic X environment interaction variances were generally small for all traits except yield and bolls per plant. Lint yield was highly positively correlated with lint percentage and bolls per plant and negatively correlated with seed index and weight per boll. Utilizing the information furnished by the variance and covariance relationships, several selection indices for lint yield were constructed. These indices involving lint percentage, boll number, and seed index in addition to yield itself, appeared to be of possible value as an aid to selection.

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Accession: 014036954

Download citation: RISBibTeXText

DOI: 10.2134/agronj1958.00021962005000030004x


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