Genetic parameters and variability in physic nut accessions during early developmental stages.

The objective of this work was to estimate the genetic parameters and variability among accessions (half-sib families) of physic nut (Jatropha curcas) during the early stages of development. For this study, 110 accessions in the first year of development of the physic nut germplasm bank, maintained at Embrapa Cerrados, DF, Brazil, were evaluated in situ. The experiment was established in a randomized complete block design, with two replicates and five plants per plot arranged in rows at 4x2 m spacing. Grain yield, total number of branches per plant, plant height, stem diameter, canopy projection on the row, canopy projection between rows, canopy volume, number of days until first flowering and height of the first inflorescence were evaluated. Estimates of vegetative genetic parameters showed the existence of genetic variability in the physic nut germplasm bank. Physic nut accessions of the germplasm bank were grouped into five similarity groups based on character divergence. Although preliminary, the obtained results are promising for showing potential for Jatropha improvement with selective efficiency.

Bibliographic Details

Main Authors:	LAVIOLA, B. G., ROSADO, T. B., BHERING, L. L., KOBAYASHI, A. K., RESENDE, M. D. V. de
Other Authors:	BRUNO GALVEAS LAVIOLA, CNPAE; TATIANA BARBOSA ROSADO, CNPAE; LEONARDO LOPES BHERING, UNIVERSIDADE FEDERAL DE VIÇOSA; ADILSON KENJI KOBAYASHI, CPAMN; MARCOS DEON VILELA DE RESENDE, CNPF.
Format:	Artigo de periódico biblioteca
Language:	English eng
Published:	2011-02-08
Subjects:	Germplasm bank., Banco de Germoplasma, Melhoramento Vegetal., plant breeding.,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/876248
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