Diallel and generation analysis in F2 soybean populations
¹Universidade Federal de Uberlândia, Instituto de Biotecnologia, CEP 38405-320, Uberlândia, MG, Brasil
²Universidade Federal de Uberlândia, Instituto de Ciências Agrárias, CEP 38410-337, Uberlândia, MG, Brasil
³Instituto Federal Goiano, Campus Urutaí, Núcleo de Agronomia, CEP 75790-000, Urutaí, GO, Brasil
*Correspondence: ferreirasb@ hotmail.com
Abstract:
The present study aimed to obtain estimates of the general (GCA) and specific (SCA) combining abilities of three soybean parents by means of the half table balanced diallel and to estimate genetic parameters of agronomic traits in F2 populations. The experiment was organized in complete randomized blocks with ten replications. The plants obtained from the combinations between the parents UFU 510, UFUS 7415 and MG/BR 46 Conquista were individually evaluated for thirteen agronomic traits. The results indicated that the parent UFUS 7415 had the highest and most positive GCA values for the production components. The best cross was UFU 510 × UFUS 7415, with the highest number of total pods and grain production. The three combinations showed a high coefficient of heritability for the number of productive nodes. At the crossing UFU 510 × UFUS 7415, greater selection gains and higher averages were observed for the number of pods with one, two and three grains and the number of total pods.
Key words:
diallel, estimation of genetic parameters, segregating populations