Estimation of genetic parameters of seed germination and seedling emergence of cowpea

Ariana Lisboa Meira, Leandro Gonçalves dos Santos, Hellenn Thallyta Alves e Mendes, Ana Paula Barreto Públio, Ubiratan Oliveira Souza, Cláudio Lúcio Fernandes Amaral

Resumo

The cowpea is one of the main sources of protein for the population of the Brazilian Northeast and North regions. This study aimed to estimate the genetic parameters on seed germination and seedling emergence in cowpea cultivars. This study was conducted at the Seed Analysis Laboratory of the State University of Southwest Bahia, campus Vitória da Conquista, Bahia State, Brazil. The experimental design was completely randomized with four replications and five treatments (cultivars). The cultivars were BRS Xique-xique, BRS Novaera, BRS Guariba, BRS Pujante and BRS Marataoã. To compare means, we used the Tukey test at 5% probability. The parameters evaluated were: number of normal (SN) and abnormal (SA) seedlings, germination percentage (PG), germination speed index (ISG), percentage of emergency (PE), emergency speed index (ISE), electrical conductivity (EC) and mass of 100 grains (MHG). For the variables that were significative, genetic parameters were estimated. The coefficients of phenotypic and genotypic variation and heritability were high for variables. The relationship genotypic and environmental coefficient of variation was greater than one, indicating that the genetic effects highlighted in relation to environmental effects. The genetic gain was down to EC and MHG. For the variables related to seed germination there was no difference among cultivars. In relation to seedling emergence, BRS Novaera was better than others.

Palavras-chave

qualidade fisiológica; teste de vigor; Vigna unguiculata.

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