Title:	Abnormal cytokinesis in microsporogenesis of Brachiaria humidicola (Poaceae: Paniceae).
Authors:	ADAMOWSKI, E. V. BOLDRINI, K. R. PAGLIARINI, M. S. VALLE, C. B. do
Affiliation:	Eleniza de Victor Adamowski, UEM; Kellen Regina Boldrini, UEM; Maria Suely Pagliarini, UEM; CACILDA BORGES DO VALLE, CNPGC.
Date Issued:	2007
Citation:	Genetics and Molecular Research, Ribeirão Preto, v. 6, n. 3, p. 616-621, 2007.
Description:	Microsporogenesis was evaluated in the Brachiaria humidicola collection of the Embrapa Beef Cattle Center, represented by 60 acessions. One acession (H121) presented an abnormal pattern of cytokinesis that had never been reported in this genus. Among 900 meiocytes analyzed in the first division, 10.7% underwent precocious and multiple cytokinesis in metaphase I, fractionating the genome and the cytoplasm into two or more parts. The expected cytokinesis after telophase I did not occur. The abnormal meiocytes from the first division entered the second division but the second cytokinesis after telophase II was also abnormal. Among the 857 meiocytes analyzed in the second division, 10.9% presented abnormal, incomplete or total absence of cytokinesis. Dyads and binucleated microspores were recorded among the meiotic products. The use of this accession in the Embrapa breeding program is compromised.
Thesagro:	Melhoramento genético vegetal Citogenética vegetal Planta Forrageira Meiose Brachiaria Humidicola
NAL Thesaurus:	Plant breeding Cytogenetics Brazil
Keywords:	Braquiária Citocinese Campo Grande Mato Grosso do Sul Brasil Feed crops Feed grasses Citokinesis
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPGC)