The production and assay of segmental substitution lines in barley

Gale, M. D.; Rees, H.

doi:10.1017/s001667230001226x

Cited by 9 publications

(3 citation statements)

References 16 publications

(6 reference statements)

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“…Although weak in growth, these T/T plants were self-fertile, and served as an important source of N/T plants in crosses with N/N plants. The homozygote inferiority exhibited in the present T/T plants was in accordance with earlier reports on grass pea (Talukdar 2011a) and pea (Müller 1975), but it contradicted the origin of vigorous translocation homozygote in different other crops (Gale and Rees 1971;Sjödin 1971;Palmer and Heer 1984).…”

Section: Discussionsupporting

confidence: 92%

Cytogenetics of a reciprocal translocation integrating distichous pedicel and tendril-less leaf mutations inLathyrus sativusL.

Talukdar

2013

Caryologia

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Grass pea (Lathyrus sativus L.) is a crop with 2n = 2x = 14 chromosomes. Two variants were isolated from 250 Gy gamma ray treated M 2 progenies of variety BioL-203: (i) two pedicels per peduncle (distichous pedicel); and (ii) complete absence of tendril in leaf (tendril-less). Occurrence of quadrivalents at meiosis I and partial pollen sterility (48.50%) indicated that the plants were heterozygous for a reciprocal translocation (RT), and were tentatively designated as RT-7. It transmitted at an average of 44% in the progeny, and along with normal fertile plants (N/N), produced trisomic plants (5.76%) with association of five chromosomes in selfed and intercrossed progenies. Test of independence of this newly found translocation was performed by analyzing the pattern of chromosomal ring formation at meiosis I in the F 1 progeny of crosses between RT-7 and six previously detected RT lines. Presence of a ring of six chromosomes in F 1 plants indicates that the two translocations have one chromosome in common in crosses between RT-7 and RT-2, RT-3, RT-5 and RT-6, but possessed two different chromosomes in RT-7 Â RT-1 and in RT-7 Â RT-4. The two mutant traits assorted independently in F 2 and back cross progenies of N/N plants. However, a strong deviation of segregation of four phenotypes derived from N/N Â RT-7 from normal F 2 and back cross ratios revealed tight linkages among translocation breakpoint, distichous pedicel and tendril-less leaf. The results suggested that the two mutations, distichous pedicel and tendril-less leaf, which assorted independently in N/N plants, were integrated on a single chromosome by a reciprocal translocation in RT-7 line.

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Section: Discussionsupporting

confidence: 92%

Cytogenetics of a reciprocal translocation integrating distichous pedicel and tendril-less leaf mutations inLathyrus sativusL.

Talukdar

2013

Caryologia

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“…BARLEY has a low level of chiasma formation in proximal parts of most chromosome arms (Gale and Rees, 1971;Rick, 1971). Thus, as in other organisms, inconsistencies probably exist between the "genetic" positions of gene loci as indicated on linkage maps and their actual physical or "cytological" positions on the chromosomes.…”

Section: Introductionmentioning

confidence: 99%

Linkage map of the long arm of barley chromosome 3 using C-bands and marker genes

Linde‐Laursen

1982

Heredity

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SUMMARYThe long arm of barley chromosome 3 can be divided into four segments by three C-band locations. From the centromere the segments comprise 4 per cent, 26 per cent, 34 per cent, and 36 per cent of the arm length. The segregation of 114 F2-plants showed a 1:2: 1-ratio for C-bands at the three locations. No recombination was observed between the two proximal C-band locations whereas the two distal locations recombined with a frequency of 12±2 per cent. The three C-band locations were linked with loci cer-zd, uz, and cer-zn, but not with the tightly linked loci Est-1 and Est-4. The order of and distance (in per cent rec.) among the three cytological markers and the three marker gene loci were: 3l1-<1 per cent -312-2± 1 per cent-cer-zd-2±1 per cent-uz -8±2 per cent-313-16±3 per cent-cer-zn. A comparison of cytological distances and linkage values suggests that recombination is virtually confined to the distal half of this chromosome arm. In addition, C-bands at one location on chromosomes 6 and 7, respectively, segregated in 1 :2: 1-ratios. The C-band location on chromosome 6 and the Amy-i locus were linked with a recombination percentage of 23 3 per cent. The usefulness of multiple marker stocks is discussed.

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“…GALE & REES (1971) showed in barley that the homozygous state has little or no effect on the phenotype. GUSTAFSSON et al (I971) reported that about 80 percent of the translocation homozygotes of barley were fully fertile.…”

Section: Discussionmentioning

confidence: 99%

Morphological and cytological abnormalities in a homozygous interchange in Pisum sativum

Müller

1976

Genetica

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The production and assay of segmental substitution lines in barley

Cited by 9 publications

References 16 publications

Cytogenetics of a reciprocal translocation integrating distichous pedicel and tendril-less leaf mutations inLathyrus sativusL.

Cytogenetics of a reciprocal translocation integrating distichous pedicel and tendril-less leaf mutations inLathyrus sativusL.

Linkage map of the long arm of barley chromosome 3 using C-bands and marker genes

Morphological and cytological abnormalities in a homozygous interchange in Pisum sativum

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