Tolerance to abiotic stresses

Research output: Chapter in Book/Report/Conference proceedingChapter

9 Citations (Scopus)

Abstract

Hybrids With Other Solanum Species In contrast to the normal meiosis of hybrids within Lycopersicon, meiosis in hybrids involving the more distantly related Solanum species is partially disrupted. Observations in this area are based primarily on F1 L. esculentum x S. lycopersicoides hybrids, of which the first were synthesized by Rick (1951). Detailed studies were conducted on comparative chromosome morphology and associations in the 2x and 4x intergeneric hybrids (Menzel 1962, 1964, Menzel and Price 1966). Chromosome behavior during early prophase of the 2x hybrid is relatively normal: chromosomes are completely synapsed and form normal synaptonemal complexes at pachytene. However, occasional inversion or deficiency configurations are observed, and the total pachytene complement length of S. lycopersicoides is nearly 1.5 times that of the cultivated tomato. Chromosomes 4, 9, and 10 of S. lycopersicoides were found to be longer than the corresponding chromosomes of L. esculentum, and the resultant bivalents showed unequal pairs. During meiosis, 2x hybrids undergo reduced chiasma formation and produce about four univalents/cell at metaphase I. In 4x allotetraploids, pairing occurs preferentially among homologous chromosomes, resulting in mostly bivalents and a few multivalents. The 4x hybrids also exhibit greater pollen fertility than diploids, and produce a few viable seeds. In allotriploid (sesquidiploid) hybrids, consisting of two genomes of L. esculentum and one of S. lycopersicoides, preferential pairing of the L. esculentum homologues produces 12 bivalents, with the S. lycopersicoides chromosomes forming 12 univalents (Rick et al. 1986). In addition, the condensation of S. lycopersicoides chromosomes during early diakinesis of the sesquidiploids is significantly delayed with respect to their L. esculentum counterparts. These observations of incomplete chromosome pairing and lack of synchronization during meiosis indicate the chromosomes of L. esculentum and S. lycopersicoides are homeologous.

Original languageEnglish (US)
Title of host publicationGenetic Improvement of Solanaceous Crops Volume 2
Subtitle of host publicationTomato
PublisherCRC Press
Pages521-590
Number of pages70
ISBN (Electronic)9781439844069
ISBN (Print)9781578081790
StatePublished - Jan 1 2006

Fingerprint

Chromosomes
abiotic stress
chromosomes
Meiosis
meiosis
Solanum
pachytene stage
prophase
triploidy
Solanum lycopersicoides
Synaptonemal Complex
Meiotic Prophase I
Chromosome Pairing
synaptonemal complex
chromosome morphology
Prophase
chiasmata
Chromosomes, Human, Pair 12
Chromosomes, Human, Pair 10
Chromosomes, Human, Pair 9

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Agricultural and Biological Sciences(all)

Cite this

Foolad, M. R. (2006). Tolerance to abiotic stresses. In Genetic Improvement of Solanaceous Crops Volume 2: Tomato (pp. 521-590). CRC Press.
Foolad, Majid R. / Tolerance to abiotic stresses. Genetic Improvement of Solanaceous Crops Volume 2: Tomato. CRC Press, 2006. pp. 521-590
@inbook{40d3d09684b543e2abaa928655aca516,
title = "Tolerance to abiotic stresses",
abstract = "Hybrids With Other Solanum Species In contrast to the normal meiosis of hybrids within Lycopersicon, meiosis in hybrids involving the more distantly related Solanum species is partially disrupted. Observations in this area are based primarily on F1 L. esculentum x S. lycopersicoides hybrids, of which the first were synthesized by Rick (1951). Detailed studies were conducted on comparative chromosome morphology and associations in the 2x and 4x intergeneric hybrids (Menzel 1962, 1964, Menzel and Price 1966). Chromosome behavior during early prophase of the 2x hybrid is relatively normal: chromosomes are completely synapsed and form normal synaptonemal complexes at pachytene. However, occasional inversion or deficiency configurations are observed, and the total pachytene complement length of S. lycopersicoides is nearly 1.5 times that of the cultivated tomato. Chromosomes 4, 9, and 10 of S. lycopersicoides were found to be longer than the corresponding chromosomes of L. esculentum, and the resultant bivalents showed unequal pairs. During meiosis, 2x hybrids undergo reduced chiasma formation and produce about four univalents/cell at metaphase I. In 4x allotetraploids, pairing occurs preferentially among homologous chromosomes, resulting in mostly bivalents and a few multivalents. The 4x hybrids also exhibit greater pollen fertility than diploids, and produce a few viable seeds. In allotriploid (sesquidiploid) hybrids, consisting of two genomes of L. esculentum and one of S. lycopersicoides, preferential pairing of the L. esculentum homologues produces 12 bivalents, with the S. lycopersicoides chromosomes forming 12 univalents (Rick et al. 1986). In addition, the condensation of S. lycopersicoides chromosomes during early diakinesis of the sesquidiploids is significantly delayed with respect to their L. esculentum counterparts. These observations of incomplete chromosome pairing and lack of synchronization during meiosis indicate the chromosomes of L. esculentum and S. lycopersicoides are homeologous.",
author = "Foolad, {Majid R.}",
year = "2006",
month = "1",
day = "1",
language = "English (US)",
isbn = "9781578081790",
pages = "521--590",
booktitle = "Genetic Improvement of Solanaceous Crops Volume 2",
publisher = "CRC Press",

}

Foolad, MR 2006, Tolerance to abiotic stresses. in Genetic Improvement of Solanaceous Crops Volume 2: Tomato. CRC Press, pp. 521-590.

Tolerance to abiotic stresses. / Foolad, Majid R.

Genetic Improvement of Solanaceous Crops Volume 2: Tomato. CRC Press, 2006. p. 521-590.

Research output: Chapter in Book/Report/Conference proceedingChapter

TY - CHAP

T1 - Tolerance to abiotic stresses

AU - Foolad, Majid R.

PY - 2006/1/1

Y1 - 2006/1/1

N2 - Hybrids With Other Solanum Species In contrast to the normal meiosis of hybrids within Lycopersicon, meiosis in hybrids involving the more distantly related Solanum species is partially disrupted. Observations in this area are based primarily on F1 L. esculentum x S. lycopersicoides hybrids, of which the first were synthesized by Rick (1951). Detailed studies were conducted on comparative chromosome morphology and associations in the 2x and 4x intergeneric hybrids (Menzel 1962, 1964, Menzel and Price 1966). Chromosome behavior during early prophase of the 2x hybrid is relatively normal: chromosomes are completely synapsed and form normal synaptonemal complexes at pachytene. However, occasional inversion or deficiency configurations are observed, and the total pachytene complement length of S. lycopersicoides is nearly 1.5 times that of the cultivated tomato. Chromosomes 4, 9, and 10 of S. lycopersicoides were found to be longer than the corresponding chromosomes of L. esculentum, and the resultant bivalents showed unequal pairs. During meiosis, 2x hybrids undergo reduced chiasma formation and produce about four univalents/cell at metaphase I. In 4x allotetraploids, pairing occurs preferentially among homologous chromosomes, resulting in mostly bivalents and a few multivalents. The 4x hybrids also exhibit greater pollen fertility than diploids, and produce a few viable seeds. In allotriploid (sesquidiploid) hybrids, consisting of two genomes of L. esculentum and one of S. lycopersicoides, preferential pairing of the L. esculentum homologues produces 12 bivalents, with the S. lycopersicoides chromosomes forming 12 univalents (Rick et al. 1986). In addition, the condensation of S. lycopersicoides chromosomes during early diakinesis of the sesquidiploids is significantly delayed with respect to their L. esculentum counterparts. These observations of incomplete chromosome pairing and lack of synchronization during meiosis indicate the chromosomes of L. esculentum and S. lycopersicoides are homeologous.

AB - Hybrids With Other Solanum Species In contrast to the normal meiosis of hybrids within Lycopersicon, meiosis in hybrids involving the more distantly related Solanum species is partially disrupted. Observations in this area are based primarily on F1 L. esculentum x S. lycopersicoides hybrids, of which the first were synthesized by Rick (1951). Detailed studies were conducted on comparative chromosome morphology and associations in the 2x and 4x intergeneric hybrids (Menzel 1962, 1964, Menzel and Price 1966). Chromosome behavior during early prophase of the 2x hybrid is relatively normal: chromosomes are completely synapsed and form normal synaptonemal complexes at pachytene. However, occasional inversion or deficiency configurations are observed, and the total pachytene complement length of S. lycopersicoides is nearly 1.5 times that of the cultivated tomato. Chromosomes 4, 9, and 10 of S. lycopersicoides were found to be longer than the corresponding chromosomes of L. esculentum, and the resultant bivalents showed unequal pairs. During meiosis, 2x hybrids undergo reduced chiasma formation and produce about four univalents/cell at metaphase I. In 4x allotetraploids, pairing occurs preferentially among homologous chromosomes, resulting in mostly bivalents and a few multivalents. The 4x hybrids also exhibit greater pollen fertility than diploids, and produce a few viable seeds. In allotriploid (sesquidiploid) hybrids, consisting of two genomes of L. esculentum and one of S. lycopersicoides, preferential pairing of the L. esculentum homologues produces 12 bivalents, with the S. lycopersicoides chromosomes forming 12 univalents (Rick et al. 1986). In addition, the condensation of S. lycopersicoides chromosomes during early diakinesis of the sesquidiploids is significantly delayed with respect to their L. esculentum counterparts. These observations of incomplete chromosome pairing and lack of synchronization during meiosis indicate the chromosomes of L. esculentum and S. lycopersicoides are homeologous.

UR - http://www.scopus.com/inward/record.url?scp=84891500957&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84891500957&partnerID=8YFLogxK

M3 - Chapter

SN - 9781578081790

SP - 521

EP - 590

BT - Genetic Improvement of Solanaceous Crops Volume 2

PB - CRC Press

ER -

Foolad MR. Tolerance to abiotic stresses. In Genetic Improvement of Solanaceous Crops Volume 2: Tomato. CRC Press. 2006. p. 521-590