Selecao para Rendimento e Qualidade da Forragem em Alfafa Crioula.

Buscou-se, atraves do teste de progenies de policruzamento, avaliar a variabilidade genetica de uma populacao da alfafa Crioula (Medicago sativa L.) e selecionar individuos com superior capacidade geral de combinacao para criar caracteristicas ligadas ao rendimento e a qualidade da forragem. As progenies apresentaram variabilidade para rendimento de materia seca (RMS), altura media das plantas, taxa de crescimento em altura, relacao folha/caule, teor de pro-teína bruta (TPB) e rendimento de proteina bruta. As estimativas de herdabilidade no sentido restrito para RMS e TPB foram, respectivamente, de 0,50 e 0,55. O ganho esperado para RMS e TPB, considerando uma intensidade de selecao de 20%, correspondeu a 472 kg/ha e 1,2%, respectivamente. Sugere-se a formacao de uma cultivar sintetica.Made available in DSpace on 2011-04-09T12:13:12Z (GMT). No. of bitstreams: 1 pab08set93.pdf: 277409 bytes, checksum: a04121c592adbd79677c64f8a72d6b32 (MD5) Previous issue date: 2001-08-16199

Genetic diversity in table grapes based on RAPD and microsatellite markers

The objective of this work was to analyze the genetic diversity of 47 table grape accessions, from the grapevine germplasm bank of Embrapa Semiárido, using 20 RAPD and seven microsatellite markers. Genetic distances between pairs of accessions were obtained based on Jaccard's similarity index for RAPD data and on the arithmetic complement of the weighted index for microsatellite data. The groups were formed according to the Tocher's cluster analysis and to the unweighted pair‑group method with arithmetic mean (UPGMA). The microsatellite markers were more efficient than the RAPD ones in the identification of genetic relationships. Information on the genetic distance, based on molecular characteristics and coupled with the cultivar agronomic performance, allowed for the recommendation of parents for crossings, in order to obtain superior hybrids in segregating populations for the table grape breeding program of Embrapa Semiárido

Contribuição ao conhecimento da ictiofauna do Manguezal de Cacha Pregos, Ilha de Itaparica, Baía de Todos os Santos, Bahia Contribution to knowledge of ichthyofauna of Mangrove Cacha Pregos, Itaparica island, Todos os Santos bay, Bahia

<abstract language="eng">A check-list of fishes collected in a mangrove in Cacha Pregos, south of ltaparic Island, State of Bahia, Brazil (about 13o07'S,38o48'W) from 1988-1989 and 1991-1992 is presented. Fifteen orders, 46 families and 85 species (Teleostei except one Chondrichthyes) were identified, represented specimens whose adults live in different marine ecossystems