Accessory Chromosomes and Their Meiotic Behaviour in Hybrids of Grain Sorghum and Johnson Grass

Raman, V. S.; Meenakshi, K.; Thangam, M.

doi:10.1508/cytologia.41.193

Cited by 3 publications

(4 citation statements)

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“…obs.). Plants with four to six accessory or B-chromosomes have been described in certain diploid populations from India (Raman et al 1976 Mouftah and Smith (1969) Monaghan (.1979) Burt (1914) and Wedderspoon and Burt (1974) The pollen of Johnson grass also contaminates sorghum grown for seed (Monaghan 1979) resulting in smaller seed and reduced yield of the grain (Youngclaus 1912). …”

mentioning

confidence: 99%

THE BIOLOGY OF CANADIAN WEEDS.: 61. Sorghum halepense (L.) PERS.

Warwick¹,

Black²

1983

Can. J. Plant Sci.

123

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mentioning

confidence: 99%

THE BIOLOGY OF CANADIAN WEEDS.: 61. Sorghum halepense (L.) PERS.

Warwick¹,

Black²

1983

Can. J. Plant Sci.

123

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“…In S. halepense , four to six Bs have been observed, and their occurrence seems to be limited exclusively to diploids (2n = 2x = 20) [ 63 ]. The behavior of Bs during meiosis in pollen mother cells was aberrant; accessory bivalents exhibited delayed disjunction or nondisjunction leading to the subsequent elimination.…”

Section: B Chromosomes In the Genus Sorghummentioning

confidence: 99%

“…The behavior of Bs during meiosis in pollen mother cells was aberrant; accessory bivalents exhibited delayed disjunction or nondisjunction leading to the subsequent elimination. Three types of Bs were reported, two of which showed partial homology [ 56 , 63 ].…”

Section: B Chromosomes In the Genus Sorghummentioning

confidence: 99%

“…Considering the conclusions of the cytological studies [ 31 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 63 ], it is clear that there are several types of Bs within the genus, which differ in their morphology. One evolutionary scenario assumes the formation of the B chromosome in a single event and its persistence in closely related species.…”

Section: Did B Chromosomes Emerge Several Times In the Genus mentioning

confidence: 99%

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B Chromosomes in Genus Sorghum (Poaceae)

Bednářová

Karafiátová

Hřibová

et al. 2021

Plants

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B chromosomes (Bs) are supernumerary dispensable genomic elements that have been reported in several thousand eukaryotic species. Since their discovery, Bs have been subjected to countless studies aiming at the clarification of their origin, composition, and influence on the carriers. Despite these efforts, we still have very limited knowledge of the processes that led to the emergence of Bs, the mechanisms of their transmission, and the effects of Bs on the hosts. In the last decade, sophisticated molecular methods, including next-generation sequencing, have provided powerful tool to help answer some of these questions, but not many species have received much attention yet. In this review, we summarize the currently available information about Bs in the genus Sorghum, which has so far been on the periphery of scientific interest. We present an overview of the occurrence and characteristics of Bs in various Sorghum species, discuss the possible mechanisms involved in their maintenance and elimination, and outline hypotheses of the origin of Bs in this genus.

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