Reproductive mode and DNA content of Paspalum accessions from Plicatula group

Agronomic, nutritive value, reproductive, cytogenetic, and molecular aspects of Paspalum accessions: Contribution to the development of new forage cultivars

“…This shows the difference in the genomic DNA content in different botanical groups. The variation in DNA contents observed in this work, within and between botanical groups, was also reported in previous works (Galdeano et al, 2016; Gonçalves et al, 2021; Vaio et al, 2007).…”

“…Interspecific crosses using P. malacophyllum as a pollen donor have been reported in the literature with sexual species such as P. urvillei and P. dilatatum (Bennett & Bashaw, 1966), P. conspersum (Burson & Bennett, 1976), and P. juergensii and P. dilatatum (Burson & Hussey, 1998). As for P. atratum , the recent availability of tetraploid sexual germplasm (Acuña et al, 2019) and the polyploidization of other diploid sexual materials within the Plicatula group (Gonçalves et al, 2021) may enable interspecific crosses with this species and release its genetic variability.…”

IAPT chromosome data 36

“…Synonymization of P. limbatum under P. lenticulare has been proposed (Oliveira & Valls, 2008) and is being followed in recent cytogenetic documents Novo & al., 2019). Therefore, previous counts of n = 10 or 2n = 20 are now recorded for P. lenticulare, also including a recent one from a very narrow-leaved form from the state of Mato Grosso do Sul, Brazil (Gonçalves & al., 2021). Here we add three more counts for this variable species, including another diploid from the state of Tocantins.…”

“…hexastachyum, a trend now reversed as the mechanisms that regulate the evolution of polyploidy and the expression of apomixis are better understood (Quarín, 1974;Quarín & Hanna, 1980;Daurelio & al., 2004;. A similar situation is apparent in the Plicatula group, with respect to P. lenticulare, recorded as predominantly tetraploid in Bolivia, Paraguay and several Brazilian states (Norrmann & al., 1994;Marcón & al., 2018;Gonçalves & al., 2021). Diploid cytotypes of this species, usually showing reduced sizes of plants, leaves and spikelets, were identified as P. limbatum Henrard, with 2n = 20 reported from Argentina, Bolivia and Paraguay (Norrmann & al., 1994;, but there are also reports of 2n = 40, from Brazil and Paraguay (Adamowski & al., 2005;.…”

Lignin, glutathione and kinases play important roles inPaspalum regnelliidefense against spittlebug (Mahanarva spectabilis) attack

“…In general, forage grasses have two usual cytotypes, diploid with sexual reproduction or polyploid with apomixis, a kind of procreation that generates an entire progeny of clones (Quarin, 1992). This can hamper genetic variability acquisition since it is necessary to cross a sexual parent with an apomictic parent of the same ploidy level (Gonçalves et al ., 2021), but fortunately, some natural tetraploid sexual accessions were found in the Virgata botanic group (Acuña et al ., 2019), such as those of P. regnellii species. Moreover, it is a perennial species with good biomass production, some resistance to shading and high forage potential (Bortolin et al ., 2019).…”