HERITABILITIES FOR SWEETPOTATO WEEVIL RESISTANCE

Autor:	Boyett Graves, John C. Schneider, Paul G. Thompson
Rok vydání:	1993
Předmět:	Horticulture biology Resistance (ecology) Weevil biology.organism_classification
Zdroj:	HortScience. 28:261E-261
ISSN:	2327-9834 0018-5345
Popis:	Narrow-sense heritabilities (h2) for sweetpotato weevil (Cylas formicarius elegantulus) resistance were estimated in 2 breeding populations. Population A included clones from US programs with previously reported moderate levels of weevil resistance. Population B included clones of US origin plusplant introductions from 14 countries. Parents and progenies were included in field evaluations with no wild weevils present. Weevils were cultured and applied to each plant. Population A was evaluated for 2 years and population B for 1. The GXE estimate for population A was also used for population B. Heritabilities were estimated by parent offspring regression and variance component analysis. Average h2 for percentage noninjured roots were 0.35 and 0.47 for population A and B, respectively. Intermating highest performing genotypes from both populations should increase h2 by increasing frequencies of resistance genes. A moderate rate of increase in resistance levels should result from selecting and intermating resistant genotypes.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::075185d692a32e8a5fb28e7cccd6ba0d https://doi.org/10.21273/hortsci.28.4.261e Zobrazit plný text záznamu