Abstract
Food-quality comparisons between tropically adapted genotypes of dry bean (Phaseolus vulgaris L.) and accessions from domestic breeding agencies showed there is sufficient variability in important nutritional and canning traits among tropical beans to justify their use in temperate-climate breeding programs. Specifically, tropical bean germplasm may be of use to transfer stress tolerance and lodging resistance to commercially acceptable genotypes while the breeder is simultaneously breeding to maintain or improve nutritional composition and canning quality. Seed of 35 bean accessions representing plant introductions, breeding lines, and cultivars were screened for proximate chemical composition, yield, and several horticultural characters. Seventeen of these accessions, including several commercial dry bean cultivars, were selected for canning evaluations. Beans were adjusted to 16% moisture before soaking and processing. Soaked and processed beans were evaluated for water uptake, texture (with a Kramer Shear Press), and general canning quality. Protein content was highest in domestically adapted beans (31%) and lowest in the nonblack tropical array of genotypes (22%). Tropical beans showed a greater tendency to clump in the can after cooking. This indicates excessive breakdown of tropical beans during thermal processing. Nonsignificant correlation coefficients indicated that textural differences and soaking properties of the beans were not associated; however, textural differences were correlated with the final moisture percentage in processed tropically adapted beans. Several tropical genotypes were much firmer or much softer after cooking than ‘Sanilac’, which is considered the industry standard for making canning comparisons. Further evaluation of texture by examining Kramer Shear Press tracings showed that textural differences among genotypes could be broken down into a configuration showing a large shear force component, and a curve characterized by mostly compression. The curve types appeared to be a characteristic of the genotype rather than of seed-coat color, size of bean, or final moisture percentage.
and suffers from lodging, thus making mechanized harvesting difficult when it is cultivated without support. ‘Tavella Brisa Croscat’ was developed through selection with the aim of preserving the sensory traits of the landrace (low seed-coat
significant difference test at the 95% level. Results Seed structure and morphological characteristics. Sugar pine seeds are large, having a size of ≈1 cm in length and 5 mm in width. Seed coat color is brown to nearly black. Among the three genotypes examined
besides t are required to express various types of partly colored patterns, viz., Cl , Z , Bip , J , and Fib ( Bassett, 2007 ). Seed coat colors are controlled by 10 genes: P , [ C R ], Gy , Z , J , G , B , V , and Rk ( Bassett, 2007
24 cm long with 14 seeds. Coats of dried seeds have a smooth to wrinkled texture and red color ( Fig. 4A ). Seed size is large with a weight of 22.1 g per 100 dry seeds, and dry seeds have an ovoid shape. US-1136 plants grown for 12 weeks without
Cited Calub, A.G. 1968 Inheritance of seed coat colour and colour pattern in Vigna sinensis MS thesis, University of the Philippines, college of agriculture. In: Cowpea: Abstract of world literature 14. UTA, Ibadan, Nigeria. Drabo, I. Ladeinde, T
associated authority files 12 June 2006 < http://mobot.mobot.org/W3T/Search/vast.html > Murphy, J.B. Stanley, R.G. 1975 Increased germination rates of baldcypress and pondcypress seed following treatments affecting the seed coat Physiol. Plant. 35 135 139 10
Cited Coumans, M. Come, D. Gaspars, T. 1976 Stabilized dormancy in sugarbeet fruits. I. Seed coats as a physicochemical barrier to oxygen Bot. Gaz. 137 274 278 Edelstein, M. Ben Tal, Y
hypochlorite and 0.1% (v/v) Tween 20 for 1.5 h in a laminar flow hood. Carbon source treatments. After disinfection, seeds coats were removed in half of the seeds and were then distributed randomly in nine media (86 or 87 seeds each) composed of WPM
National Crabapple Germplasm Genetic Center (Yangzhou, Jiangsu, China, lat. 32°420′N, long. 119°550′E). The seed goes through the following process: first, to soften seed coats, seeds were soaked in warm water (40 to 45 °C) for 4 h. Second, to break seed