Cytological Studies in Some Central and Eastern Himalayan Grasses

Mehra, P. N.; Sharma, Madhu

doi:10.1508/cytologia.40.453

Cited by 11 publications

(4 citation statements)

References 12 publications

(1 reference statement)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…18-20). The diploid cytotype with 2n=16 is a new chromosome report for the species with normal meiosis, whereas the other cytotypes with 2n=18 and 36 confirms the previous reports ( 14: Mehra and Sunder 1969, 28: Christopher and Abraham 1971, Mehra and Sharma 1975, Parkash 1979, Mehra 1982, Koul and Gohil 1987, Kaur et al 2010a, Gupta et al 2014, 28+1B: Mehra et al 1968 Mehra and Sharma 1975, Mehra 1982, 24, 36: Bir and Sahni 1987, Bir et al 1988, 36: Gupta et al 2014, 54: Mehra et al 1968 P-1 50480 Devsar, Bhiwani, 224 9 ( Fig. 39 Bir and Sahni 1985, 18, 36: Bir et al 1988, 36: Mehra et al 1968, Bir et al 1988 N Tragus roxburghii Panigrahi P-1 50616 Indri, Karnal 252 10 ( Fig.…”

Section: Resultssupporting

confidence: 87%

“…11). The meiotic behavior is found to 18: Gupta and Srivastava 1970, 18, 18+0-3B, 36: Tripathi et al 1977, 18, 18+0-3B, 36, 54: Malik 1966, 18+1-3B, 36, 54: Malik and Tripathi 1968, 27: Gupta and Srivastava 1970, Christopher and Abraham 1974, Kuumar and Sachdeva 1988, Sinha et al 1990, 27, 36: Sachdeva and Bhatia 1980, 36: Malik 1966, Malik and Tripathi 1968, Mehra et al 1968, Mehra and Sharma 1975, Kalia 1978, Sharma et al 1978, Mehra 1982, Bir et al1987, Koul and Gohil 1987, Sinha et al 1990, Singhal et al 2014, 36+0-2B: Tripathi et al 1977, 36, 40: Mehra et al 1968 . Pollen fertility is found to be very low.…”

Section: Resultsmentioning

confidence: 96%

See 1 more Smart Citation

Cytology of Some Grasses from Haryana and Shiwalik Hills

Dhaliwal¹,

Kaur

Gupta

2018

CYTOLOGIA

View full text Add to dashboard Cite

The present paper deals with the male meiosis of 17 species covered under 11 genera of the family Poaceae. Three species: Cynodon dactylon (n=8), Sporobolus diander (n=9) and S. helvolus (n=9) are the new cytotypes from world. Further, five species i.e., Avena fatua, A. sativa, C. dactylon, Lolium temulentum var. temulentum and Phalaris minor show anomalous meiotic behavior with the presence of cytomixis, chromatin bridges, laggards, secondary associations and interbivalent connections which lead to low pollen viability.

show abstract

Section: Resultssupporting

confidence: 87%

Section: Resultsmentioning

confidence: 96%

Cytology of Some Grasses from Haryana and Shiwalik Hills

Dhaliwal¹,

Kaur

Gupta

2018

CYTOLOGIA

View full text Add to dashboard Cite

show abstract

“…Amplified fragment length polymorphism (AFLP) DNA fingerprinting (Vos et al 1995;Reeves et al 1998;Carolan et al 2002) data showed that M. nepalensis was clearly separate from other Miscanthus species (Hodkinson et al 2002b). Species of section Diandra resemble Miscanthus s.s. on morphological grounds, but possess two anthers, instead of the usual three, and a basic chromosome number of five or ten instead of 19 (Mehra and Sharma 1975). It is not clear from this analysis which genus they belong to or what their closest relatives are.…”

Section: Infrageneric Relationships Of Miscanthusmentioning

confidence: 84%

Phylogenetics of Miscanthus , Saccharum and related genera (Saccharinae, Andropogoneae, Poaceae) based on DNA sequences from ITS nuclear ribosomal DNA and plastid trnL intron and trnL-F intergenic spacers

Hodkinson

Chase

Lledó

et al. 2002

Journal of Plant Research

234

206

View full text Add to dashboard Cite

DNA sequences were used to assess the monophyly and inter-relationships of Miscanthus, Saccharumand related genera in the Saccharum complex. Three DNA regions were sequenced, including the trnLintron and the trnL-F intergenic spacer of the plastid genome and the ITS region of nuclear ribosomal DNA (nrDNA). Because it was more variable, the ITS region proved most suitable for phylogenetic reconstruction at this level, and the results indicate that Miscanthus s.l. and Saccharum s.l. are polyphyletic. A set of species from Saccharum section Ripidium(clade a) do not group closely with any members of Saccharum s.l. A number of Miscanthus species from eastern or south-eastern Asia represent a monophyletic group with a basic chromosome number of 19 (clade b), but the other species from Africa and the Himalayas are clearly excluded. There is support for a monophyletic Saccharum s.s. clade including S. officinarumand S. spontaneum that is sister to Miscanthus s.s(clade c). There is no evidence to support the division of some Saccharum s.l. into the genera currently known as Erianthus and Narenga. Saccharum contortum( =Erianthus contortus), S. narenga (= Narenga porphyrocoma) and Erianthus rockii, group more closely with Miscanthus fuscus, a species from the Himalayas and also with the African Miscanthus s.l. species (= Miscanthidium, clade d).

show abstract

“…The diverse and climate resilient Chloridoid subfamily of grasses has more than 40 desiccation tolerant species (Marks et al, 2021), and an estimated 90% of species within this clade are polyploid (Roodt and Spies, 2003). Despite the prevalence of polyploidy within this lineage, some desiccation tolerant Chloridoid grasses such as Oropetium thomaeum, O. capense, Tripogon minimus, T. spicatus, and T. loliiformis are diploid with very small genomes of ~220-270 Mb (Mehra and Sharma, 1975;Bartels and Mattar, 2002;VanBuren et al, 2015). In contrast, other desiccation tolerant Chloridoid grasses including Eragrostis nindensis and Sporobolus stapfianus are tetraploid (Pardo et al, 2020;Chávez Montes et al, 2022) and there is no clear pattern between polyploidy and desiccation tolerance within the Chloridoid grasses.…”

Section: Introductionmentioning

confidence: 99%

Polyploidy enhances desiccation tolerance in the grassMicrochloa caffra

Delgado

Makonya

Cooper

et al. 2023

Preprint

View full text Add to dashboard Cite

Desiccation tolerance evolved recurrently across diverse plant lineages to enable survival in water limited conditions. Many resurrection plants are polyploid and several groups have hypothesized that polyploidy enabled the evolution of desiccation tolerance. However, due to the vast evolutionary divergence between resurrection plant lineages, the rarity of desiccation tolerance, and the prevalence of polyploidy in plants, this hypothesis has been difficult to test. Here, we surveyed variation in morphological, reproductive, and desiccation tolerance traits across natural populations of a single species that has differing ploidies and tested for links between polyploidy and resilience. We sampled multiple populations of the resurrection grassMicrochloa caffraacross an environmental gradient ranging from mesic to xeric in South Africa. We describe two distinct ecotypes ofM. caffrathat occupy different ends of the environmental gradient and exhibit consistent differences in ploidy, morphological, reproductive, and desiccation tolerance traits in both field and common growth conditions. Interestingly, plants with more polyploid genomes were consistently more desiccation tolerant, less reproductive, and larger than plants with smaller genomes and lower ploidy. These data suggest that polyploidy enhances desiccation tolerance and that stronger selective pressures in increasingly xeric sites may play a role in maintaining and increasing desiccation tolerance.

show abstract

Cytological Studies in Some Central and Eastern Himalayan Grasses

Cited by 11 publications

References 12 publications

Cytology of Some Grasses from Haryana and Shiwalik Hills

Cytology of Some Grasses from Haryana and Shiwalik Hills

Phylogenetics of Miscanthus , Saccharum and related genera (Saccharinae, Andropogoneae, Poaceae) based on DNA sequences from ITS nuclear ribosomal DNA and plastid trnL intron and trnL-F intergenic spacers

Polyploidy enhances desiccation tolerance in the grassMicrochloa caffra

Contact Info

Product

Resources

About