TY - JOUR
T1 - Maize participatory breeding in Portugal
T2 - Comparison of farmer's and breeder's on-farm selection
AU - Mendes-Moreira, Pedro
AU - Satovic, Zlatko
AU - Mendes-Moreira, João
AU - Santos, João Pedro
AU - Nina Santos, João Pedro
AU - Pêgo, Silas
AU - Vaz Patto, Maria Carlota
PY - 2017/12/1
Y1 - 2017/12/1
N2 - “VASO” is a Portuguese participatory maize breeding project (1984), where several maize landraces such as “Pigarro” have been selected both by a farmer's (phenotypic recurrent selection) and a breeder's approach (S2 lines recurrent selection). The objectives of this study were to determine the phenotypic and genotypic responses to participatory selection using these two different approaches, to clarify to which extent both selection methods preserve genetic diversity, and conclude what is the preferred method to apply in sustainable farming systems. The results, obtained via ANOVA, regression analyses and molecular markers, indicate that for both selection methods, genetic diversity was not significantly reduced, even with the most intensive breeder's selection. Although there were some common outputs, such as the determinated versus indeterminated ears, cob and ear weight ratio per ear and rachis 2, specific phenotypic traits evolved in opposite directions between the two selection approaches. Yield increase was only detected during farmer selection, indicating its interest on PPB. Candidate genes were identified for a few of the traits under selection as potential functional markers in participatory plant breeding.
AB - “VASO” is a Portuguese participatory maize breeding project (1984), where several maize landraces such as “Pigarro” have been selected both by a farmer's (phenotypic recurrent selection) and a breeder's approach (S2 lines recurrent selection). The objectives of this study were to determine the phenotypic and genotypic responses to participatory selection using these two different approaches, to clarify to which extent both selection methods preserve genetic diversity, and conclude what is the preferred method to apply in sustainable farming systems. The results, obtained via ANOVA, regression analyses and molecular markers, indicate that for both selection methods, genetic diversity was not significantly reduced, even with the most intensive breeder's selection. Although there were some common outputs, such as the determinated versus indeterminated ears, cob and ear weight ratio per ear and rachis 2, specific phenotypic traits evolved in opposite directions between the two selection approaches. Yield increase was only detected during farmer selection, indicating its interest on PPB. Candidate genes were identified for a few of the traits under selection as potential functional markers in participatory plant breeding.
KW - fasciation
KW - genetic diversity
KW - landraces
KW - maize
KW - participatory breeding
KW - Pigarro
KW - SSR
KW - Zea mays L.
UR - http://www.scopus.com/inward/record.url?scp=85037978375&partnerID=8YFLogxK
U2 - 10.1111/pbr.12551
DO - 10.1111/pbr.12551
M3 - Article
AN - SCOPUS:85037978375
SN - 0179-9541
VL - 136
SP - 861
EP - 871
JO - Plant Breeding
JF - Plant Breeding
IS - 6
ER -