Influence of phytohemagglutinin on the agronomic performance of beans (Phaseolus vulgaris L.)
1992
Confalonieri, M. (Istituto Sperimentale per l'Orticoltura, Montanaso Lombardo (Italy)) | Bollini, R. | Berardo, N. | Vitale, A. | Allavena, A.
The abundant lectin phytohemagglutinin (10 % of total seed protein) does not contain sulfur amino acids and, being a potent antimetabolite, it is responsible for the lowering of the nutritional value of bean seeds. The aim of the present work was to improve the dry bean cultivar 'Taylor's Horticultural' by genetically introducing the lectin null (lec/lec) character from two null genotypes: 'Pinto UI 111' and 'Heidi'. 37 BC(2)F(3) and 14 BC(6)F(5) inbred lines were evaluated in agronomical trials. Analysis of Variance (ANOVA) showed significant differences among BC(2)F(3) breedings lines for all traits under evaluation. Comparison of the Lec/Lec genotypes versus lec/lec did not show statistically significant differences in the means for the following traits: yield, yield components and percentage of protein in the seed. 14 BC(6)F(5) lines, compared together with their recurrent parent 'Taylor's Horticultural', showed significant differences among genotypes for 1000 seed weight, protein percentage on dry matter and ash percentage. No significant differences were observed for grain yield. The data indicate that lectin removal did not have a detrimental effect on the traits evaluated.
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