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EFECTOS DE LA DOMESTICACIÓN EN ALGUNAS CARACTERÍSTICAS FLORALES DEL CEMPOALXÓCHITL (Tagetes erecta L.)

1998; Chapingo Autonomous University; Volume: IV; Issue: 01 Linguagem: Inglês

10.5154/r.rchsh.1998.01.003

2007-4034

Miguel Ángel Serrato-Cruz, Salvador Miranda-Colín,

Growth and nutrition in plants

The main objective of this study was to determine the inflorescence traits that could have been modified by the process of domestication in Tagetes erecta. To this purpose, artifitial depth soil conditions were designed and domesticated and wild T. erecta germplasm were included to detect the main floral structure changes. T. erecta ssp. cultivated and both T. erecta ssp. huetamo and T. erecta ssp. tlalámac wild plants were grown in pots with 3 kg of soil and containers with 30 g of soil. Wild genotypes grown under different soil environments showed few changes on size and number of floral traits, in the other hand, changes of floral traits in domesticated genotype were profuse, particularly the involucre width and the number of flower per inflorescence. Considering to T. erecta ssp. huetamo as the putative parent of T. erecta ssp. cultivated, the last one had significant increases in several floral traits: like involucre width and length, number of flowers per capitulum and the number of ligules, and reduction in seed size.