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QTL detection of yield-related traits of cashew
The identification of quantitative trait loci (QTL) and marker-assisted selection with a view to breeding programs have aroused great interest, including for cashew improvement. This study identified QTL for yield-related traits: nut weight, male and hermaphrodite flowers. The traits were evaluated...
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Published in: | Crop breeding and applied biotechnology 2012-03, Vol.12 (1), p.60-66 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | The identification of quantitative trait loci (QTL) and marker-assisted selection with a view to breeding programs have aroused great interest, including for cashew improvement. This study identified QTL for yield-related traits: nut weight, male and hermaphrodite flowers. The traits were evaluated in 71 F1 genotypes of the cross CCP 1001 x CP 96. The methods of interval mapping and multiple QTL mapping were applied to identify QTL. Eleven QTL were detected: three for nut weight, four for male flowers and four for hermaphrodite flowers. The QTL accounted for 3.79 to 12.98 % of the total phenotypic variance and had phenotypic effects of -31.81 to 34.25 %. The potential for marker-assisted selection of the QTL hf-2f and hf-3m is great and the phenotypic effects and percentage of phenotypic variation higher than of the others.
A identificação de locos de caráter quantitativo (QTLs) e a seleção assistida por marcadores têm despertado grande interesse em programas de melhoramento, inclusive para o cajueiro. Esta pesquisa objetivou identificar QTLs relacionados a características de componentes de produção: peso da castanha, flores masculinas e hermafroditas. Avaliaram- se 71 plantas F1 originadas do cruzamento CCP 1001 x CP 96. Para a detecção de QTLs foram utilizadas as metodologias de mapeamento de intervalo e mapeamento de QTLs múltiplos. Onze QTLs foram identificados: três para peso da castanha, quatro para flores masculinas e quatro para flores hermafroditas. Os QTLs explicaram entre 3,79 e 12,98 % da variação fenotípica total e apresentaram efeito fenotípico variando entre -31,81 e 34,25 %. Os QTLs fh-2f e fh- 3m têm grande potencial para seleção assistida por marcadores, apresentando os maiores efeitos fenotípicos e as maiores explicações da variação fenotípica. |
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ISSN: | 1518-7853 1984-7033 1984-7033 |
DOI: | 10.1590/S1984-70332012000100008 |