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United States Department of Agriculture

Agricultural Research Service

Research Project: GENETIC AND CULTURAL PRACTICE IMPROVEMENT FOR SUSTAINABLE COTTON PRODUCTION

Location: Coastal Plain Soil, Water and Plant Conservation Research

Title: Components of hybrid vigor in upland cotton (Gossypium hirsutum L.) and their relationship with environment

Authors
item Tyagi, Priyanka -
item Bowman, Daryl -
item Edmisten, Keith -
item Bourland, Fred -
item CAMPBELL, BENJAMIN
item Fraser, Dawn -
item Wallace, Ted -
item Kuraparthy, Vasu -

Submitted to: Journal of Euphytica
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: August 2, 2013
Publication Date: January 20, 2014
Citation: Tyagi, P., Bowman, D.T., Edmisten, K., Bourland, F.M., Campbell, B.T., Fraser, D.E., Wallace, T., Kuraparthy, V. 2014. Components of hybrid vigor in upland cotton (Gossypium hirsutum L.) and their relationship with environment. Journal of Euphytica. 195:117-127.

Interpretive Summary: Cotton lint yield is primarily a product of yield component traits such as boll number and lint per boll, both of which can be further dissected into sub-components. Relationships among the yield components are complex where they further interact with the environment. In this study, we studied yield components of hybrid cotton lint yield (heterosis) and their relationship with environment among hybrids developed from three elite cultivars. Heterosis was observed for lint yield as well as yield components. The relationship between heterosis and mean environmental yield was negative for two hybrid combinations, whereas one hybrid showed increased heterosis from low to high yielding environments. Boll number was the major yield component contributing to lint yield. However, yield components contributing to the change in heterosis from low to high yielding environments were different for the three hybrids.

Technical Abstract: Upland cotton (Gossypium hirsutum L.) hybrids display commercially useful levels of heterosis for lint yield. Cotton lint yield is primarily a multiplicative product of boll number and lint per boll, both of which can be further dissected into sub-components. Relationships among the yield components are complex where they further interact with the environment. To identify different yield components of hybrid cotton lint yield and their relationship with environment, three cotton varieties, Deltapine 51, Stoneville 474 and LA 887 and, their respective hybrids were evaluated for lint yield components across five environments. Heterosis was observed for lint yield as well as yield components. The relationship between heterosis and mean environmental yield was negative for two hybrid combinations, whereas one hybrid showed increased heterosis from low to high yielding environments. Boll number was the major yield component contributing to lint yield. However, yield components contributing to the change in heterosis from low to high yielding environments were different for the three hybrids. The change in lint yield heterosis across environments was correlated with lint per boll and lint per seed for Deltapine 51 x Stoneville 474 and LA 887 x Deltapine 51. On the contrary, bolls m-2 and boll retention were the main yield components contributing to higher lint yield heterosis of Stoneville 474 x LA 887 in low yielding environments. Results also reveal effects of parental entries on lint yield as well as a relationship between heterosis and environment.

Last Modified: 8/19/2014
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