Genetic diversity between improved banana diploids using canonical variables and the Ward‑MLM method

• Main Author: Pereira, Valquíria Martins
• Publication Date: 2012
• Other Authors: Borges, Cristine Vanz, Brandão, Lívia Pinto, Oliveira, Larissa Santos, Souza, Cintia Paula Feitosa, Gonçalves, Zalmar Santana, Silva, Sebastião de Oliveira e, Santos-Serejo, Janay Almeida dos, Ferreira, Claudia Fortes, Amorim, Edson Perito, Ledo, Carlos Alberto da Silva
• Format: Article
• Language: eng; por
• Source: Pesquisa Agropecuária Brasileira (Online)
• Download full: https://seer.sct.embrapa.br/index.php/pab/article/view/12224
• topic: Musa; hybrids; microsatellites; morphological characteristics; Musa; híbridos; microssatélites; características morfológicas

The objective of this work was to estimate the genetic diversity of improved banana diploids using data from quantitative analysis and from simple sequence repeats (SSR) marker, simultaneously. The experiment was carried out with 33 diploids, in an augmented block design with 30 regular treatments and three common ones. Eighteen agronomic characteristics and 20 SSR primers were used. The agronomic characteristics and the SSR were analyzed simultaneously by the Ward‑MLM, cluster, and IML procedures. The Ward clustering method considered the combined matrix obtained by the Gower algorithm. The Ward‑MLM procedure identified three ideal groups (G1, G2, and G3) based on pseudo‑F and pseudo‑t2 statistics. The dendrogram showed relative similarity between the G1 genotypes, justified by genealogy. In G2, 'Calcutta 4' appears in 62% of the genealogies. Similar behavior was observed in G3, in which the 028003‑01 diploid is the male parent of the 086079‑10 and 042079‑06 genotypes. The method with canonical variables had greater discriminatory power than Ward‑MLM. Although reduced, the genetic variability available is sufficient to be used in the development of new hybrids.