Inheritance of self-compatibility and flower morphology in an inter-specific buckwheat hybrid

Woo, Sun Hee; Adachi, Tomohiko; Jong, Seung Keun; Campbell, C. G.

doi:10.4141/p98-117

Cited by 40 publications

(42 citation statements)

References 8 publications

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“…In Fagopyrum genus, F. homotropicum and F. esculentum are the two most closely related species within the cymosum clade or group (Ohnishi and Matsuoka 1996;Yasui and Ohnishi 1998). Fertile hybrids between F. homotropicum diploid and F. esculentum (Campbell 1995;Wang and Campbell 1998;Woo et al 1999b) formed bivalents at meiosis (data not shown), confirming the close relationship between F. esculentum and F. homotropicum diploid. When homologous chromosomes of F. homotropicum tetraploid were not present in the F 1 hybrids, homoeologous chromosome pairing probably occurred between the three genomes, one from F. esculentum and two from F. homotropicum, resulting in gametes with uneven chromosome numbers and/or chromosome loss.…”

Section: Mechanisms Of Chromosome Doubling and Eliminationsupporting

confidence: 50%

“…Efforts to improve common buckwheat have been made through interspecific hybridization between common buckwheat and related species F. cymosum (Ujihara et al 1990;Suvorova et al 1994;Hirose et al 1995;Rumyantseva et al 1995;Woo et al 1999a) and F. tataricum (Morris 1951;Samimy 1991;Hirose et al 1995;Samimy et al 1996;Chen 1998;Wang and Campbell 1998;Woo 1998;Fesenko et al 2001;Wang et al 2002a). However, success has been limited due to sterility of the hybrids.…”

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confidence: 99%

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Interspecific hybridization between diploid Fagopyrum esculentum and tetraploid F. homotropicum

Wang¹,

Scarth²,

Campbell³

2005

Can. J. Plant Sci.

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. 2005. Interspecific hybridization between diploid Fagopyrum esculentum and tetraploid F. homotropicum. Can. J. Plant Sci. 85: 41-48. The wild diploid species Fagopyrum homotropicum (2n = 2x = 16) has been used for buckwheat improvement, but, prior to this study, the tetraploid form (2n = 4x = 32) had not been hybridized with the cultivated species F. esculentum. The objective of this study was to hybridize F. esculentum with tetraploid F. homotropicum to increase the genetic variability. Forty-one interspecific F 1 hybrids were obtained through ovule rescue in vitro, with hybridity confirmed using morphological characters, chromosome numbers (2n = 3x = 24) and DNA analysis. The F 1 plants were mainly sterile. However, seven seeds were set spontaneously on two hybrid plants, and a large number of seeds were obtained after colchicine treatment. The F 2 plants were divided into two groups based on chromosome numbers and morphology. The first group was hexaploid plants (2n = 6x = 48) or hypohexaploid plants (2n = 44-46), partially fertile with "gigas" features including increased height, dark green leaves, and large seeds with thick seed hulls. The second group of plants was diploid (2n = 2x = 16) (one plant had 17 chromosomes), with normal growth and fertility, and a combination of characters from both parents, indicating that genetic recombination had occurred during chromosome elimination. The diploid group was superior to the hexaploid group for use in buckwheat breeding programs due to the desirable characters and the ease of crossing. This is the first report of interspecific hybridization using different ploidy levels in the Fagopyrum genus.

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Section: Mechanisms Of Chromosome Doubling and Eliminationsupporting

confidence: 50%

mentioning

confidence: 99%

Interspecific hybridization between diploid Fagopyrum esculentum and tetraploid F. homotropicum

Wang¹,

Scarth²,

Campbell³

2005

Can. J. Plant Sci.

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“…This inheritance pattern was first proposed for the genus Primula, where there is evidence that three to five, or more, linked genes occur (Ernst, 1955;Dowrick, 1956;Lewis and Jones, 1992;Kurian and Richards, 1997;Barrett and Shore, 2008). There is more limited evidence supporting the occurrence of a supergene in lineages outside the Primulaceae that have independently evolved distyly, including Fagopyrum (Woo et al, 1999;Matsui et al, 2003;Fesenko et al, 2006;Wang et al, 2005) and Turnera, where the inheritance of self-compatible homostyles has been investigated (Shore and Barrett, 1985;Barrett and Shore, 1987;Tamari et al, 2001Tamari et al, , 2005.…”

Section: Introductionmentioning

confidence: 99%

Characterization of X-ray-generated floral mutants carrying deletions at the S-locus of distylous Turnera subulata

2010

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To investigate the genetic architecture of distyly in Turnera subulata and test the hypothesis that a supergene determines distyly, we used X-ray mutagenesis to generate floral mutants. Based upon the crossing design, all progeny were expected to be short-styled. Of 3982 progeny screened, 10 long-styled mutants, one long homostyle and one short homostyle were recovered. Assays for molecular markers tightly linked to the S-locus showed that the mutants were missing 1-3 markers indicating they are deletion mutants. We investigated the incompatibility phenotype of the mutants and found that both their styles and pollen behaved like those of the long-styled morph. There was a variation in the absolute length of styles, stamens and pollen size of the long-styled mutants. Furthermore, long-styled mutants possessing larger deletions tended to have their anthers and stigmas in closer proximity. We explored the inheritance of the S-locus mutations and found that only one of the deletion mutations was transmitted to progeny where we recovered seven such progeny. Remarkably, our data are consistent with the supergene model (GPA/gpa) of Primula. The long homostyle mutant appears to have deletions involving both the G and P loci. The other mutants appear to have deletions of the entire S-locus. The mutants generated will serve as a valuable resource for the molecular dissection of the S-locus region, and in the identification of genes determining distyly.

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“…Self-incompatibility and self-compatibility are controlled by the S locus, and the self-compatibility allele S h dominates the self-incompatibility allele, s 17,11 . F 1 plants were produced by a cross between early leaf-senescence self-incompatible pin plants of KS1 and wild-type self-compatible long-homostyle plants of sco-ASH and sco-KNY.…”

Section: Estimation Of Number Of Genes Controlling Early Leaf-senescencementioning

confidence: 99%

Characterization of a Novel Early Leaf-Senescence Line in Common Buckwheat (Fagopyrum esculentum)

Matsui

Mori

Koga

et al. 2013

JARQ

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Seeds of common buckwheat usually mature while leaves are still green, causing problems for harvest machinery and limiting yields. We developed an early leaf-senescence line, Kyushu 1, from spontaneous mutants. To characterize this mutant line physiologically and genetically, we measured the change in leaf chlorophyll content in two regions of Japan with different environments, and performed genetic analyses with self-compatible lines. The chlorophyll content of Kyushu 1 was lower than that of the wild type at seed maturity in both regions. F 1 progeny of the cross between wild-type plants and Kyushu 1 showed a wild-type phenotype. F 2 progeny segregated into wild-type and early leaf-senescence phenotypes in a 3:1 or 13:3 ratio, suggesting that the early leaf senescence of Kyushu 1 is controlled by either a single recessive gene or an epistatic interaction between two loci.

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Inheritance of self-compatibility and flower morphology in an inter-specific buckwheat hybrid

Cited by 40 publications

References 8 publications

Interspecific hybridization between diploid Fagopyrum esculentum and tetraploid F. homotropicum

Interspecific hybridization between diploid Fagopyrum esculentum and tetraploid F. homotropicum

Characterization of X-ray-generated floral mutants carrying deletions at the S-locus of distylous Turnera subulata

Characterization of a Novel Early Leaf-Senescence Line in Common Buckwheat (Fagopyrum esculentum)

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