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The effect of different levels of inbreeding on self-incompatibility and inbreeding depression in pineapple

Sanewski, G.M. (2009) The effect of different levels of inbreeding on self-incompatibility and inbreeding depression in pineapple. In: Proceedings of the ISHS Acta Horticulturae. Proceedings of the Sixth International Pineapple Symposium. Joao Pessoa, Brazil, 18-23 November 2007. International Society for Horticultural Science (ISHS) No. 822, pp. 63-70.

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Publisher URL: http://www.actahort.org
Organisation URL: http://www.actahort.org/books/822/index.htm

Abstract

A high level of heterozygosity in domesticated pineapple is one of the main obstacles hindering the efficient development of new varieties. Selfing has been proposed as a strategy to minimise this heterozygosity through the development of parentals with a greater level of homozygosity. Selfing and a range of lesser levels of inbreeding were evaluated for their effects on seed production and inbreeding depression in the early growth of seedlings. Selfing produced few seeds, and very few viable seedlings. The paternal backcross and several half-sib combinations exhibited minimal effects on seed development or early growth and in some cases were similar to the outcross. Sibcrosses were generally unsuccessful. The highest inbreeding coefficient that was not associated with severe inbreeding depression was approximately 0.25. The effect of inbreeding depression and the level of homozygosity on several quantitative traits including those related to fruit quality within the inbred populations, is now being assessed.

Item Type:Book Section
Additional Information:© International Society for Horticultural Science (ISHS).
Keywords:Ananas comosus var. comosus; breeding; inbreeding coefficient; selfing; sibcrosses; crop quality; crosses; fruits; pineapples; seedlings; seeds.
Subjects:Plant culture > Seeds. Seed technology
Plant culture > Fruit and fruit culture > Culture of individual fruits or types of fruit > Pineapple
Deposited On:04 Feb 2010 05:57
Last Modified:09 Jun 2011 23:46

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