title: Stability and  adaptability of popcorn genotypes in the State of Rio de Janeiro, Brazil.
abstract: This  study aimed to obtain estimates of stability and adaptability of phase launched  materials and materials recommended in the country, for the northern and  northwestern regions of Rio de Janeiro State, Brazil, and made a comparative  analysis of different methods to evaluate stability and adaptability of grain  yield and popping expansion. To this end, 10 genotypes were evaluated  (UNB2U-C3, UNB2U-C4, BRS Angela, Viçosa, Beija-Flor, IAC 112, IAC 125, Zélia,  Jade, and UFVM2 Barão de Viçosa) in five environments. The Yates and Cochran  method revealed that genotypes UFV2M Barão de Viçosa, BRS Angela and UNB2U-C3  were the most stable for grain yield. This method also indicated superiority of  genotypes UNB2U-C3, UNB2U-C4, BRS Angela, Viçosa, IAC 125, and Zélia for  popping expansion. The Plaisted and Peterson and Wricke methods demonstrated  that genotypes Zélia and UNB2U-C4 were the most productive and stable. These  methods indicated genotypes UNB2U-C3 and BRS Angela as the most stable for  popping expansion. The Kang and Phan ranking system uses methods based on  analysis of variance and classified population UNB2U-C4 as the genotype with  the highest stability of grain production and confirmed cultivar BRS Angela as  the most stable for popping expansion. Genotypes IAC 112 and UNB2U-C4 were the  most stable and adapted for grain yield, according to the Lin and Binns method.  The P(i) statistics  also ranked UNB2U-C3 and UNB2U-C4 as the genotypes with the best predictability  and capacity for popping expansion.
authors.affiliation: Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brasil.
authors.forename: G F
authors.initials: GF
authors.lastname: Pena
authors.forename: A T
authors.initials: AT
authors.lastname: do Amaral
authors.forename: L S A
authors.initials: LS
authors.lastname: Gonçalves
authors.forename: L S
authors.initials: LS
authors.lastname: Candido
authors.forename: C
authors.initials: C
authors.lastname: Vittorazzi
authors.forename: R M
authors.initials: RM
authors.lastname: Ribeiro
authors.forename: S P
authors.initials: SP
authors.lastname: Freitas
mesh_terms: D000222:Adaptation, Physiological / Q000235:genetics*; D000465:Algorithms; D001938:Brazil; D004777:Environment; D005838:Genotype; D012639:Seeds / Q000235:genetics; D018709:Statistics, Nonparametric; D003313:Zea mays / Q000235:genetics*