Comparison of morphological and molecular data for pea (Pisum sativum) in low and high yielding environments

ESPÓSITO, M. A.; MILANESI, L.; MARTIN, E.A; CRAVERO V.; LÓPEZ ANIDO, F.; COINTRY, E.L

NEW ZEALAND JOURNAL OF CROP AND HORTICULTURAL SCIENCE

RSNZ PUBLISHING

Año: 2009 vol. 37 p. 227 - 233

0114-0671

<!-- /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";} @page Section1 {size:612.0pt 792.0pt; margin:70.85pt 3.0cm 70.85pt 3.0cm; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.Section1 {page:Section1;} --> Genotype by year interactions is considered to be among the major factors limiting response to selection. The objectives were estimate the heritability via variance components and genotype x year interactions for different traits determining the consensus between morphological and molecular data in two environmental conditions. Forty accessions of pea were evaluated during 2005 and 2006 in stressful and non-stressful situations. Morphologic, productive and SRAP data were collected. The phenotypic and the genotypic variances were determined and the heritability was estimated. The same data were analyzed for each single environment. 162 polymorphic SRAP’s bands were scored. A comparison between morphological and molecular data was carried. The correlation between SRAP and morphological data was r=0.55 for 2005 and r=0.72 for 2006 showing the highest correspondence between both data set for unfavourable environmental condition. These results suggest that exposure to combinations of environmental stresses may increase the expression of genetic variability for productive traits