Association of Seed Color with Emergence and Seed Yield of Snap Beans1

Differences in water absorption by intact seeds and in osmotic properties of excised seed coats were measured in 4 near-isogenic breeding lines of snap bean, Phaseolus vulgaris L. White seeds absorbed water more rapidly than colored seeds. Excised white seed coats were more permeable to water than colored seed coats in response to an osmotic gradient. Seed coat thickness and seed coat dry weight were negatively correlated with rate of osmosis through the seed coats. Colored seeds had greater seed coat dry weight and thickness than white-seeded isolines.

mentioning

confidence: 99%

Seed Coat and Water Absorption Properties of Seed of Near-isogenic Snap Bean Lines Differing in Seed Coat Color1

Wyatt

1977

“…With the exception of the 'White Kidney', all had colored seeds. Pigmented seed coats have previously been associated with resistant to rhizoctonia root rot (1,4,5,6) but Dickson and Boettger (2), found that resistance was not always tightly linked to seed color.…”

Section: Resultsmentioning

confidence: 99%

Resistance of Phaseolus vulgaris L. Cultivars to Hypocotyl Inoculation with Rhizoctonia solani Kuehn1,2

Moody

Benepal

Berkley

et al. 1980

Seven-day-old hypocotyls of 149 bean cultivars were inoculated with Rhizoctonia solani and incubated in a growth chamber for 72 hours at 30°C. Based on the mean size of the largest lesion, and 10 most resistant cultivars were: ‘Dwarf Horticultural Long Pod’, ‘Yellow Eye’, ‘White Kidney’, ‘Romano Pole’, ‘French Horticultural’, ‘Red Kidney’, ‘Manitou’, ‘Sutter Pink’, ‘Wren’s Egg’, and ‘Red Mexican UI 37’. The mean largest lesion for ‘Dwarf Horticultural Long Pod’ (the most resistant) was 3.0 mm2 while that for the Bush Blue Lake 274 (susceptible) was 64.4 mm2. These 10 cultivars were further tested using 5 different isolates of R. solani. ‘Yellow Eye’ was the most resistant to all 5 isolates with a mean largest lesion size of 10.0 mm2 while ‘Bush Blue Lake’ had a mean lesion size of 90.9 mm2. The root rot ratings were highly correlated with the areas of the largest lesion, and the number of lesions. ‘White Kidney’ was the only white-seeded resistant cultivar.

“…It may be that even with 98.5% (five backcrosses) recovery of the CS genomes, there were still undesirable linkages with p . This condition may be due to deleterious genes closely linked to p , to the effects of p itself, or perhaps the lack of beneficial genes associated with P , such as phenols and phenolic glycosides (3).…”

Section: Discussionmentioning

confidence: 99%

“…This idea is based, in part, on observations in a variety of crops of parthenocarpic set inducement and subsequent growth through the application of exogenous growth regulators. In strawberries, for example, successful induction of parthenocarpic fruit set and growth has been achieved with several auxins (3,5,14,25).…”

Section: Additional Index Words Fragaria Xananassa Auxin Source-sink ...mentioning

confidence: 99%

Deleterious Effects of White Seed due to p Gene in Beans

Dickson

Petzoldt

1988