Inhame
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Variabilidade genética de inhame com base em descritores quantitativos.
Variabilidade genética de inhame com base em descritores quantitativos.
Genetic variability of yam based on quantitative descriptors.
COSSA, L. C.; CERQUEIRA-PEREIRA, E. C.; ALMEIDA, D. O. do C. de; LEDO, C. A. da S.; RICARDO FRANCO CUNHA MOREIRA. Genetic variability of yam based on quantitative descriptors. African Journal of Agricultural Research, v. 14, n. 30, p. 1288-1294, 25 July, 2019.
Significado e impacto:
Foi avaliada a variabilidade genética entre genótipos de inhame (Dioscorea rotundata Poir.) coletados em quatro municípios da Bahia, Brasil, com o uso de métodos multivariados e concluiu-se que existe variabilidade genética de inhames passíveis de exploração em programas de conservação e melhoramento genético o que pode ter um impacto positivo para pequenos produtores na região do Recôncavo Baiano onde o inhame é uma fonte de renda promissora.
Abstract:
Yam is a promising income source for small producers in the Recôncavo Baiano region. However, few genetic studies have been conducted with this culture. In this sense, the aim of this study was to assess genetic variability among 89 genotypes of yam (Dioscorea rotundata Poir.) collected in four municipalities in Bahia State, Brazil. These were assessed based on eight quantitative descriptors. Data were subjected to descriptive statistics, Spearman's rank correlation, Singh criterion, cluster analysis, principal component analysis and dispersion graph. The tuber weight showed the highest coefficient of variation and correlated positively and significantly with width and length of tuber. The tuber length characteristics contributed most to the genetic divergence. The criterion pseudo-t 2 divided 89 genotypes into seven groups, being that groups 4, 5 and 7 showed the highest averages for the production characteristics. The first three principal components explained 69.49% variation and dispersion graph showed partly concordant with UPGMA method. This study revealed the existence of genetic variability of yam, which may be explored in future genetic improvement programs. Key words: Dioscorea rotundata Poir., multivariate methods, plant genetic resources, plant breeding.
Instituições parceiras:
Universidade Federal do Recôncavo da Bahia, UFRB; Embrapa Mandioca e Fruticultura, CNPMF; Pedagogic University of Mozambique, UP.