The significance of andromonoecy for the breeding of Asparagus officinalis L.

Sneep, J.

doi:10.1007/bf00038906

Cited by 46 publications

(27 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…We counted in a C 1 -generation of 47 plants bred from C 0 -plants in 1952, 36 male, 10 female and 1 andromonoecious, a ratio very unusual for asparagus. In his breeding work SNEEP (8,9) could distinguish two types of male plants, one gave an offspring consisting of only males and the other male and female offspring in a 1:1 ratio. He indicated the genetic constitution of his plants by letters : MM for male plants of the first type, Mm for male plants of the second type and mm for female plants.…”

Section: The Effect Of Tetraploidy On Some Vegetative Characters and mentioning

confidence: 99%

“…Hence without selection duplex plants will soon disappear from the next generations. From a commercial point of view male plants are more valuable (SNEEP,8,9). In order to get more males than females a breeder should therefore preserve the male plants of the C 0 -generation or take care to select for duplex male plants, which can be done by means of test crosses.…”

Section: The Effect Of Tetraploidy On Some Vegetative Characters and mentioning

confidence: 99%

See 1 more Smart Citation

Production of a colchicine-induced tetraploid asparagus

Braak

Zeilinga

1957

Euphytica

View full text Add to dashboard Cite

Section: The Effect Of Tetraploidy On Some Vegetative Characters and mentioning

confidence: 99%

Section: The Effect Of Tetraploidy On Some Vegetative Characters and mentioning

confidence: 99%

Production of a colchicine-induced tetraploid asparagus

Braak

Zeilinga

1957

Euphytica

View full text Add to dashboard Cite

“…These homozygous male lines are therefore called supermale by breeders. Supermale lines can be established from andromonoecious asparagus plants through self-fertilization of hermaphrodite flowers and the selection of homozygous males (Sneep, 1953); however, homozygous males are morphologically indistinguishable from heterozygous males, even at the flowering stage. Thus, to identify homozygous males, the occurrence of only males in the next generation must be tested after crossing with females.…”

Section: Introductionmentioning

confidence: 99%

Identification of Homozygous Male Plants by Quantitative Analysis of a Nucleotide Sequence Linked to the Sex-determination Locus in Asparagus officinalis L.

Horiuchi

Adachi

Kasai

et al. 2011

J. Japan. Soc. Hort. Sci.

View full text Add to dashboard Cite

Discrimination of homologous and heterozygous plants at the male-determination locus in asparagus (Asparagus officinalis L.) was examined by quantitative analyses of a diagnostic marker for male asparagus. The quantitative difference of a sequence, AspTaq1, derived from the Asp1-T7 diagnostic marker (Jamsari et al., 2004), was measured using the real-time monitoring PCR and normalized based on the quantitative difference of a sequence, AODEF-Taq1, derived from a single copy gene, AODEF. The normalized difference was higher in established supermales than in regular males grown from commercially available seeds. The averaged values in respective groups are in the approximate ratio of 2 : 1. Homozygous male (MM), heterozygous male (Mm), and female (mm) genotypes were obtained by selfing of an andromonoecious line. The progeny were divided into three groups by the normalized difference; plants showing high values and intermediate values were thought to be homozygous and heterozygous males, respectively. Significant amplification of AspTaq1 was not detected in several plants; therefore, they were judged to be females. Then, to identify supermales, pollen from male plants was crossed separately with female plants, and the sex of the next generation was determined. Pollen from two male plants showing high values of the normalized difference generated only males in the next generation, while pollen from 12 male plants showing intermediate values generated both female and male plants. Pollen from one male plants that showed intermediate values generated only male plants. The normalized difference in homozygous males was comparable to the value obtained using a recombinant sequence that contains an equal number of AspTaq1 and AODEF-Taq1. These results indicate that homozygous and heterozygous males can be identified by quantitative analysis of a nucleotide sequence linked to the sex-determination locus and that the use of an authentic sequence for calibration facilitates the discrimination process of those genotypes in asparagus plants.

show abstract

“…Self-pollination of those flowers can produce "supermales" (MM). Crosses between "supermales" or "s-males" and female genotypes will raise a progeny consisting exclusively of male plants (Sneep, 1953). Male plants show advantages over female plants.…”

mentioning

confidence: 99%

“…Asparagus is a dioecious species; thus, the differentiation between male or female plants requires waiting until flowering, which takes approximately 1-2 years after transplantation (Sneep, 1953). Furthermore, "supermales" (MM) cannot be differentiated phenotypically from the males (Mm), even at flowering.…”

mentioning

confidence: 99%

Short communication. Employment of molecular markers to develop tetraploid “supermale” asparagus from andromonoecious plants of the landrace ‘Morado de Huétor’

Regalado

Gil

Castro

et al. 2014

Span. j. agric. res.

View full text Add to dashboard Cite

The aim of this work was the development of new “supermale” genotypes retaining the highest genetic diversity possible of the tetraploid asparagus landrace ‘Morado de Huétor’. The elite andromonoecious male HT664 of the ‘Morado de Huétor’ asparagus landrace and the andromonoecious hybrid male HC027, obtained by crossing between this landrace and a commercial cultivar of Asparagus officinalis, were selected for self-pollination to produce possible “supermales” with genes of ‘Morado de Huétor’ (SMHT). To confirm the hybrid nature of HC027, we characterized this genotype with EST-SSR (Expressed Sequence Tag-derived Simple Sequence Repeats) markers. We also adopted the sex-linked marker Asp1-T7 for sex determination in ‘Morado de Huétor’ and the resulting hybrids between this landrace and other commercial cultivars. Asp1-T7 marker was used for the selection and genotyping of SMHT. “All-male” cultivars with a different genetic background can be generated by crossing females with these new “supermale” genotypes, and the agronomical traits of these new cultivars would be very different from the “all-male” cultivars currently available in the market, making them extremely interesting for asparagus breeding programs.

show abstract

The significance of andromonoecy for the breeding of Asparagus officinalis L.

Cited by 46 publications

References 4 publications

Production of a colchicine-induced tetraploid asparagus

Production of a colchicine-induced tetraploid asparagus

Identification of Homozygous Male Plants by Quantitative Analysis of a Nucleotide Sequence Linked to the Sex-determination Locus in Asparagus officinalis L.

Short communication. Employment of molecular markers to develop tetraploid “supermale” asparagus from andromonoecious plants of the landrace ‘Morado de Huétor’

Contact Info

Product

Resources

About