Estimation of Genetic Parameters and Prediction of Genotypic Values in Common Beans Using Mixed Models

Abstract

yield. Deviance analysis detected significant differences between the cultivars in both groups. 21Selective accuracy (Ac) was considered high for most of the traits. Broad-sense heritability (ℎ 2 ) 22 ranged from 0.05 to 0.72, but it was low for the trait yield (YLD). In the carioca grain group, the ℎ 2 23 values for the traits related to plant morphology were higher than in the black group. Nevertheless, 24the ℎ 2 values in the black group were higher in relation to the pod and seed traits. The correlations 25 for YLD were moderate but different in the two commercial groups studied. In the black group, 26variables related to the seed morphology were correlated with grain yield, and in the carioca group, 27 traits related to seed quantity. Based on the groupings, variability among the cultivars was 28 observed. Three distinct clusters were formed for the carioca group and four for the black group. 29Based on the predicted genetic values, genetic variability and the most adapted and stable cultivars 30were detected among the cultivars in the studied environments. 31

Morpho-agronomic, biochemical and molecular analysis of genetic diversity in the Mesoamerican common bean panel

“…The low Ac value obtained for YLD is a consequence of the high influence of the environment for the trait, making it difficult to select the best accessions. Delfini et al [ 40 ] estimated genetic parameters for 39 Brazilian bean cultivars and obtained a lower h 2 for YLD (0.12) than for other traits.…”

“…The absence of correlation between YLD and the other morpho-agronomic or biochemical traits is considered a complicating factor in the selection of genitors. Delfini et al [ 40 ] observed that YLD was correlated with traits related to seed morphology in black-type common bean, but with the number of seeds produced in carioca-type. These facts are related to the objectives of breeding programs in Brazil.…”

“…For carioca-type beans, breeding programs emphasize seed size (large), shape (oblong), and color (light beige with a light brown stripe), and seed size is inversely related to yield [ 41 , 42 ]. However, large seeds are not important in the black commercial group, so cultivars with smaller seeds and high yield potential have been selected [ 40 ].…”

Genetic variability and nitrogen response indices in common bean (Phaseolus vulgaris) cultivars under contrasting nitrogen environments

“…The use of the HMRPGV method allowed for cultivar selection based on N‐response indices, and cultivars were chosen according to adaptability and penalized for instability between environments (Rosado et al., 2019; Silva et al., 2019). This method has been used for the simultaneous selection of yield, adaptability, and stability in several crops such as common bean (Delfini et al., 2018), wheat (Coan et al., 2018), corn (Pinto et al, 2019), soybean (Freiria et al., 2018), and papaya (Luz et al., 2018). However, there had previously been no studies using the HMRPGV method based on responses to N‐response indices or in contrasting N top‐dressing environments.…”

Genetic variability, adaptability and, stability of safflower genotypes developed for the Brazilian conditions by REML/BLUP

“…This methodology has been used to interpret genotypic stability and adaptability of crops such as bean ( Phaseolus vulgaris L.) (Sousa et al., 2017; Delfini et al., 2018), Jatropha ( Jatropha curcas L.) (Alves et al., 2018), macaw palm ( Acrocomia aculeata ) (Rosado et al, 2019), rice ( Oryza sativa L.) (Regitano Neto et al., 2013), and cotton ( Gossypium hirsutum L.) (Moiana et al., 2014; Carvalho et al., 2016), but its application in the safflower breeding is still scarce.…”