On-plant floret longevity and cutflower postharvest longevity (PHL) of Antirrhinum majus L., snapdragon, were evaluated using inbreds P1 (16 day PHL) and P2 (6 day PHL), F1 (P1 × P2), F2 (F1 self-pollinated), F2 × F2 (among and within PHL categories: long, 17 to 25 days; middle, 9 days; and short, 2 to 3 days), and F3 families (F2 self-pollinated). F2 on-plant floret longevity and PHL correlated to later generation PHL. Prediction of progeny PHL from F2 × F2 matings appears feasible if genotypic value for PHL of F2 is known. Selection for PHL is best based on evaluation of multiple cutflowers per genotype. Significant additive and dominant genetic variance components contribute to PHL.
Genetic variation for abaxial leaf pubescence was detected among dry bean (Phaseolus vulgaris L.) cultivars/lines. Inheritance of pubescence (long, straight hairs) was studied in the dry bean crosses of pubescent `Pompadour Checa-50' (Dominican Republic) × eight glabrous cultivars/lines. Segregation for pubescence vs. glabrousness indicated that pubescence was determined by a single major gene or by duplicate recessive epistatic genes, depending on the cross involved. Trichome density (number trichomes per mm) was a quantitative trait. Thus, pubescence was a discrete trait, but trichome density ranged from low to high.
variances and heritability behaviors of yield and its components is paramount. Genetic variance and heritability can be estimated using parent–offspring regression ( Holland et al., 2003 ; Kumar and Wehner, 2011b ; Nyquist, 1991 ), North Carolina Design I
extended land requirements. Our goal is to estimate the genetic determination of nutritive traits in avocado as a prelude to the implementation of a program of marker-assisted selection (MAS). In this article we present data on the heritability of three
; Karlsen et al., 1999 ). Sensory panels are also incorporated in later stages of fruit breeding programs to estimate such genetic parameters as heritability, combining ability, and variance components (e.g., Alspach and Oraguzie, 2002 ; Oraguzie et al
estimating the broad-sense heritabilities. To our knowledge, such information is not available for sweet cherry. The objectives of our study were to phenotype cracking-relevant traits in selected sweet cherry cultivars and to quantify their heritability. We
determine inheritance, gene action, and heritability of resistance in PI 270545. Information on these parameters would be useful for designing an efficient breeding strategy for watermelon powdery mildew resistance. Materials and Methods Plant material. A
, 2009 ; N.A. Peres and T. Seijo, personal communication). Quantitative genetic parameters have been estimated for resistance to PM of strawberry in multiple previous studies. Nelson et al. (1995) estimated broad- and narrow-sense heritabilities for PM
within-family effect, an error associated with an observation on an n-th tree in the j-th family planted in the i-th block, (0, σ 2 ω ). Individual-tree, within-family, narrow sense heritability was calculated according to Cotterill (1987) . Narrow sense
analysis method provides a method to test for all genetic explanations. The joint segregation analysis method can analyze for the best genetic model, gene heritability, and gene effects that fit the data for the quantitative trait ( Cao et al., 2013 ; Gai