Sterility in Certain Gossypium Hybrids. Ii. Postfertilization Phenomena

Oakes, A. J.

doi:10.1139/g66-099

Cited by 5 publications

(4 citation statements)

References 25 publications

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“…Such histological abnormalities were then considered to result in starvation of the endosperm and of the enclosed embryo. Hakansson (1952) , as well as Oakes (1966) supported this hypothesis from their studies in Galeopsis and Gossypium, respectively. Stokes (1955) also reported a similar case in Armoracia rusticana (horseradish), in which an endospermmaternal tissue incompatibility accounted for the failure of F1 seeds to develop.…”

Section: Discussionsupporting

confidence: 52%

THE GENETIC BASIS OF CROSSING BARRIERS BETWEENORYZA PERENNISSUBSP.BARTHIIAND ITS RELATED TAXA

Chu

Oka

1970

Evolution

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Section: Discussionsupporting

confidence: 52%

THE GENETIC BASIS OF CROSSING BARRIERS BETWEENORYZA PERENNISSUBSP.BARTHIIAND ITS RELATED TAXA

Chu

Oka

1970

Evolution

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“…The superior quality of cotton fiber and the disease resistance of wild cotton have been successfully transferred to cultivated cotton [29,30]; However, diploid wild cotton and tetraploid cultivated cotton are biologically isolated. They are often genetically incompatible, forming a barrier to the full utilization of wild diploid cotton varieties [31][32][33]. We have already obtained an interspecific hybrid F 1 of G. herbaceum and G. raimondii.…”

Section: Discussionmentioning

confidence: 99%

Morphological description of a novel synthetic allotetraploid(A1A1G3G3) of Gossypium herbaceum L.and G.nelsonii Fryx. suitable for disease-resistant breeding applications

Yin

Zhan

et al. 2020

PLoS ONE

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Wild species of Gossypium ssp. are an important source of traits for improving commercial cotton cultivars. Previous reports show that Gossypium herbaceum L. and Gossypium nelsonii Fryx. have better disease resistance characteristics than commercial cotton varieties. However, chromosome ploidy and biological isolation make it difficult to hybridize diploid species with the tetraploid Gossypium hirsutum L. We developed a new allotetraploid cotton genotype (A1A1G3G3) using a process of distant hybridization within wild cotton species to create new germplasms. First of all, G. herbaceum and G. nelsonii were used for interspecific hybridization to obtain F1 generation. Afterwards, apical meristems of the F1 diploid cotton plants were treated with colchicine to induce chromosome doubling. The new interspecific F1 hybrid and S1 cotton plants originated from chromosome duplication, were tested via morphological and molecular markers and confirmed their tetraploidy through flowrometric and cytological identification. The S1 tetraploid cotton plants was crossed with a TM-1 line and fertile hybrid offspring were obtained. These S2 offsprings were tested for resistance to Verticillium wilt and demonstrated adequate tolerance to this fungi. The results shows that the new S1 cotton line could be used as parental material for hybridization with G. hirsutum to produce pathogen-resistant cotton hybrids. This new S1 allotetraploid genotype will contributes to the enrichment of Gossypium germplasm resources and is expected to be valuable in polyploidy evolutionary studies.

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“…Wild cotton species are a valuable reservoir of agronomically useful genes and genes conferring resistance to pests and diseases [ 32 , 33 ]. However, wild diploid cotton species have not been fully exploited to broaden the existing narrow genetic base through distant crosses with the world’s major cultivated tetraploid cotton due to both pre- and post-fertilization barriers between these species [ 20 , 21 , 34 , 35 ]. In this study, not only did we successfully obtain an interspecific hybrid F 1 and double its chromosome complement with colchicine, but we also alleviated the incompatibility of the new synthetic tetraploid (A 1 A 1 G 2 G 2 ) by grafting, which will lay a solid foundation for the transfer of genes of interest from the two parental diploid species.…”

Section: Discussionmentioning

confidence: 99%

“…The third strategy (tetraploid pathway) involves hybridizing two different genomic diploid species. Once the chromosome complement of this diploid hybrid is doubled, the hybrid is crossed with a cultivated tetraploid line to generate a trispecies hybrid, which is then repeatedly backcrossed with the cultivated tetraploid [ 19 – 21 ]. Using the third strategy, the triple hybrid strains ( G .…”

Section: Introductionmentioning

confidence: 99%

A New Synthetic Allotetraploid (A1A1G2G2) between Gossypium herbaceum and G. australe: Bridging for Simultaneously Transferring Favorable Genes from These Two Diploid Species into Upland Cotton

Liu

Chen

et al. 2015

PLoS ONE

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Gossypium herbaceum, a cultivated diploid cotton species (2n = 2x = 26, A1A1), has favorable traits such as excellent drought tolerance and resistance to sucking insects and leaf curl virus. G. australe, a wild diploid cotton species (2n = 2x = 26, G2G2), possesses numerous economically valuable characteristics such as delayed pigment gland morphogenesis (which is conducive to the production of seeds with very low levels of gossypol as a potential food source for humans and animals) and resistance to insects, wilt diseases and abiotic stress. Creating synthetic allotetraploid cotton from these two species would lay the foundation for simultaneously transferring favorable genes into cultivated tetraploid cotton. Here, we crossed G. herbaceum (as the maternal parent) with G. australe to produce an F1 interspecific hybrid and doubled its chromosome complement with colchicine, successfully generating a synthetic tetraploid. The obtained tetraploid was confirmed by morphology, cytology and molecular markers and then self-pollinated. The S1 seedlings derived from this tetraploid gradually became flavescent after emergence of the fifth true leaf, but they were rescued by grafting and produced S2 seeds. The rescued S1 plants were partially fertile due to the existence of univalents at Metaphase I of meiosis, leading to the formation of unbalanced, nonviable gametes lacking complete sets of chromosomes. The S2 plants grew well and no flavescence was observed, implying that interspecific incompatibility, to some extent, had been alleviated in the S2 generation. The synthetic allotetraploid will be quite useful for polyploidy evolutionary studies and as a bridge for transferring favorable genes from these two diploid species into Upland cotton through hybridization.

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Sterility in Certain Gossypium Hybrids. Ii. Postfertilization Phenomena

Cited by 5 publications

References 25 publications

THE GENETIC BASIS OF CROSSING BARRIERS BETWEENORYZA PERENNISSUBSP.BARTHIIAND ITS RELATED TAXA

THE GENETIC BASIS OF CROSSING BARRIERS BETWEENORYZA PERENNISSUBSP.BARTHIIAND ITS RELATED TAXA

Morphological description of a novel synthetic allotetraploid(A1A1G3G3) of Gossypium herbaceum L.and G.nelsonii Fryx. suitable for disease-resistant breeding applications

A New Synthetic Allotetraploid (A1A1G2G2) between Gossypium herbaceum and G. australe: Bridging for Simultaneously Transferring Favorable Genes from These Two Diploid Species into Upland Cotton

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