Effect on Fertility at the Tetraploid Level of the Genome Derived from Diploid Medicago falcata<sup>1</sup>

Oldemeyer, R. K.; Brink, R. A.

doi:10.2134/agronj1953.00021962004500120004x

Cited by 6 publications

(1 citation statement)

References 5 publications

(6 reference statements)

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“…The hypothesis of tetrasomic inheritance of a single factor was used to explain the data. The assumption of autotetraploid make up of alfalfa is supported by cytological evidence" ( 5,7,8,12). Also, tetrasomic inheritance has been reported for other characters in alfalfa (2,3,4,9,14,15,16).…”

Section: Discussionmentioning

confidence: 86%

Inheritance of an Exposed Stigma Mutant in Alfalfa, Medicago Sativa L.¹

Markus¹,

Wilsie

1957

Agronomy Journal

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Synopsis Tetrasomic inheritance of a single factor difference was postulated to explain F2 and backcross ratios from a cross involving normal × exposed stigma. Forty eight F1 plants were normal. Of 17 F2 progenies, 9 segregated approximately 35:1 and 8, approximately 3:1. Respective backcross; ratios were 5:1 and 1:1. Deviations from expected ratios indicated a deficiency of recessive genotypes, due possibly to partial selection against recessive gametes.

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Section: Discussionmentioning

confidence: 86%

Inheritance of an Exposed Stigma Mutant in Alfalfa, Medicago Sativa L.¹

Markus¹,

Wilsie

1957

Agronomy Journal

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Trisomics in diploid alfalfa

Kasha

McLennan²

1967

Chromosoma

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Cytogenetic Study on a Tetraploid Plant at the Diploid Chromosome Level

Lesins¹

1957

Can. J. Bot.

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It was ascertained that the species from which Grimm alfalfa presumably originated, viz.; Medicago sativa and M. falcata, may freely exchange genetic material without evidence of a sterility barrier. Consequently a polyhaploid obtained of Grimm may be considered as comparable to natural diploids.The polyhaploid showed some impaired morphological and physiological characters and pronounced meiotic abnormalities. The single genome (x = 8) of the polyhaploid was found to be almost non-functional. Inheritance of purple color indicated a potential autotetraploid mode of transmission of characters.The polyhaploid was raised back to the tetraploid chromosome level by chromosome doubling and compared to its original and to Grimm. The somatically chromosome-doubled counterpart was found to be a close replica of the original polyhaploid. An assumption that an accumulation of detrimental recessive genes may remain latent at the tetraploid level, and may be expressed upon later reduction to half of the genic variability as in the polyhaploid and its somatically chromosome-doubled derivative, is advanced to explain the observed phenomena.Phylogenetic, breeding, and culture-historical aspects of the results are discussed.

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Effect on Fertility at the Tetraploid Level of the Genome Derived from Diploid Medicago falcata¹

Cited by 6 publications

References 5 publications

Inheritance of an Exposed Stigma Mutant in Alfalfa, Medicago Sativa L.¹

Inheritance of an Exposed Stigma Mutant in Alfalfa, Medicago Sativa L.¹

Trisomics in diploid alfalfa

Cytogenetic Study on a Tetraploid Plant at the Diploid Chromosome Level

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Effect on Fertility at the Tetraploid Level of the Genome Derived from Diploid Medicago falcata1

Cited by 6 publications

References 5 publications

Inheritance of an Exposed Stigma Mutant in Alfalfa, Medicago Sativa L.1

Inheritance of an Exposed Stigma Mutant in Alfalfa, Medicago Sativa L.1

Trisomics in diploid alfalfa

Cytogenetic Study on a Tetraploid Plant at the Diploid Chromosome Level

Contact Info

Product

Resources

About

Effect on Fertility at the Tetraploid Level of the Genome Derived from Diploid Medicago falcata¹

Inheritance of an Exposed Stigma Mutant in Alfalfa, Medicago Sativa L.¹

Inheritance of an Exposed Stigma Mutant in Alfalfa, Medicago Sativa L.¹