Breeding behavior and chromosome numbers among New Guinea and Java <i>Impatiens</i> species, cultivated varieties, and their interspecific hybrids

Beck, A. R.; Weigle, J. L.; Kruger, Eric W.

doi:10.1139/b74-117

Cited by 9 publications

(5 citation statements)

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“…were different. Beck et al (6) and Pasutti et al (12) have reported similar observations. Cytological studies of meiotic chromosomes and chemotaxonomic investigations (7,8) should provide valuable information about speciation in these groups of Impatiens.…”

Section: Discussionmentioning

confidence: 53%

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Hybridization Among Diploid and Tetraploid Forms of New Guinea, Java, and Celebes Impatiens spp.1

Arisumi

1978

J. Amer. Soc. Hort. Sci.

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Interspecific hybrids were synthesized by intercrossing diploid and tetraploid of Impatiens spp. from New Guinea (2x=32), Java (2x=16), and Celebes (2x=8). Breeding analysis of the intra- and interploidy crosses showed that the species functioned as diploids in relation to each other. Diploid by tetraploid crosses produced little or no seed, and with few exceptions the triploid seedlings were sterile. All but 2 out of 43 seifs and reciprocal crosses among tetraploids produced viable seed. Amphidiploid and autotetraploid seedlings were pollen and seed fertile. Allotetraploids composed of 2 or 3 genomes in various unequal combinations and those with 4 genomes were pollen and seed sterile or nearly so. Most of the 3 and 4 allopolyploids were ornamentally inferior to the diploid and amphidiploid hybrids. New Guinea flower colors were recessive to those of Java and Celebes. The hybrid phenotypes were midparental for most traits and in some cases exhibited dosage effects. Some hybrids were superior to both parents in certain ornamentally important attributes.

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Section: Discussionmentioning

confidence: 53%

“…Triacontanol applied in nutrient solutions to rice seedlings at 2.3 x 10'8 m (10 jiig/liter) increased seedling dry wt and protein (nitrogen) content within 3 hr in the light or dark (6). Growth analysis indicated that the direct effect of triacontanol occurred within the first 24 hr after treatment (6).…”

Section: Methodsmentioning

confidence: 98%

Hybridization Among Diploid and Tetraploid Forms of New Guinea, Java, and Celebes Impatiens spp.1

Arisumi

1978

J. Amer. Soc. Hort. Sci.

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“…Field (5) found increasing floral injury up to 6 hr at -2.2 and -3.3°C and increasing injury for up to 12 hr at -1.7° in several apple cultivars during controlled freezing tests. Initial studies concerning the effects of freezing rate on apple blossoms by Chandler (3) were inconclusive, while subsequent studies (5,6) noted an increase in injury at rapid freezing rates. Moisture applied to the surface of apple flowers (12) and Eucalyptus leaves (7,19) just prior to freezing increased the amount of injury.…”

Section: Effect Ofmentioning

confidence: 99%

Chromosome Numbers and Comparative Breeding Behavior of Certain Impatiens from Africa, India, and New Guinea1

Arisumi¹

1980

J. Amer. Soc. Hort. Sci.

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Chromosome counts were made of 10 Impatiens spp. L. from Africa, 5 from India, and 6 from the New Guinea-Indonesia area. Chromosome numbers reported for the first time were 2x = 16 for Impatiens auricoma Baill., I. epiphytica G. M. Schulze, and I. marianae Reichb. Counts that differed from previous reports were 2x = 18 for I. campanulata Wight, 2x = 36 for I. hookeriana Arn., and 2x = 32 for I. mooreana Schltr. Breeding tests with 20 species showed that 6 were self-incompatible. Crosses between species from different geographic groups were incompatible. Four out of 72 possible crosses among 9 African species and 30 out of 30 among 6 New Guinea-Indonesia species were compatible. The 20 crosses among 5 Indian species were all incompatible. Aborted embryos were observed in 57 incompatible crosses.

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“…Unfortunately, the expected merger of New Guinea, Java, and Celebes germplasm into the domestic Itnprrtirtzs srrltrrtzrr has not yet occurred because of incompatibility barriers (1, 5). Despite these barriers with the commercial species, these newly introduced species generally have crossed readily among themselves even though their somatic chromosome numbers may vary: 2~ = 8, 16,32, and 64 ( 1 , 3,5).…”

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confidence: 99%

Pollen fertility in Java × New Guinea Impatiens interspecific hybrids

Pasutti¹,

Weigle²

1980

Can. J. Bot.

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Viable pollen-producing hybrids were obtained from the crosses New Guinea Impatiens Plant Introductions (P.I.'s) (2n = 32) × Java Impatiens P.I. 349629(2n = 16). The hybrids were crossed with a 24-chromosome amphidiploid ‘Tangeglow,’ resulting in 2n = 34-chromosome hybrids. One of these 34-chromosome hybrids was crossed with P.I. 349692 (2n = 16), producing two offspring having chromosome counts of 2n = 24 and 2n = 30. Subsequent crosses using the 30-chromosome hybrid showed a continuing tendency for production of viable partly unreduced gametes.

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Breeding behavior and chromosome numbers among New Guinea and Java Impatiens species, cultivated varieties, and their interspecific hybrids

Cited by 9 publications

References 0 publications

Hybridization Among Diploid and Tetraploid Forms of New Guinea, Java, and Celebes Impatiens spp.1

Hybridization Among Diploid and Tetraploid Forms of New Guinea, Java, and Celebes Impatiens spp.1

Chromosome Numbers and Comparative Breeding Behavior of Certain Impatiens from Africa, India, and New Guinea1

Pollen fertility in Java × New Guinea Impatiens interspecific hybrids

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