Role of partial cleistogamy in maintaining genetic purity of pigeonpea

Saxena, K B; Singh, Laxman; Ariyanayagam, R. P.

doi:10.1007/bf00025307

Cited by 18 publications

(11 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The advantages include reproductive assurance (e.g., when pollinators are rare) and reduced resources needed for reproduction (Schemske, 1978;Waller, 1984). From a practical point of view, the cleistogamy trait could be useful in maintaining genetic purity (Saxena et al, 1993) and in developing genetically modified (GM) cultivars with low risk of gene flow to non-GM varieties (Kwon et al, 2001;Daniell, 2002;Lu, 2003).…”

Section: Introductionmentioning

confidence: 99%

“…Two or more independent genes were found to be responsible for cleistogamy in sorghum (Sorghum bicolor) (Merwin et al, 1981), soybean (Glycine max) (Takahashi et al, 2001), and barley (Hordeum vulgare) (Kurauchi et al, 1993;Turuspekov et al, 2004). Single recessive genes were found to be responsible for the cleistogamous trait in pigeon pea (Cajanus cajan; Saxena et al, 1992Saxena et al, , 1993, durum wheat (Triticum durum; Chhabra and Sethi, 1991), and rice (Oryza sativa; Maeng et al, 2006). Recently, the barley Cleistogamy1 gene (Cly1) was isolated by positional cloning (Nair et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Dominant Point Mutation in a RINGv E3 Ubiquitin Ligase Homoeologous Gene Leads to Cleistogamy inBrassica napus

Arnaud

Belcram

et al. 2012

The Plant Cell

View full text Add to dashboard Cite

In the allopolyploid Brassica napus, we obtained a petal-closed flower mutation by ethyl methanesulfonate mutagenesis. Here, we report cloning and characterization of the Bn-CLG1A (CLG for cleistogamy) gene and the Bn-clg1A-1D mutant allele responsible for the cleistogamy phenotype. Bn-CLG1A encodes a RINGv E3 ubiquitin ligase that is highly conserved across eukaryotes. In the Bn-clg1A-1D mutant allele, a C-to-T transition converts a Pro at position 325 to a Leu (P325L), causing a dominant mutation leading to cleistogamy. B. napus and Arabidopsis thaliana plants transformed with a Bn-clg1A-1D allele show cleistogamous flowers, and characterization of these flowers suggests that the Bn-clg1A-1D mutation causes a pronounced negative regulation of cutin biosynthesis or loading and affects elongation or differentiation of petal and sepal cells. This results in an inhibition or a delay of petal development, leading to folded petals. A homoeologous gene (Bn-CLG1C), which shows 99.5% amino acid identity and is also constitutively and equally expressed to the wild-type Bn-CLG1A gene, was also identified. We showed that P325L is not a loss-of-function mutation and did not affect expression of Bn-clg1A-1D or Bn-CLG1C. Our findings suggest that P325L is a gain-of-function semidominant mutation, which led to either hyper-or neofunctionalization of a redundant homoeologous gene.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Dominant Point Mutation in a RINGv E3 Ubiquitin Ligase Homoeologous Gene Leads to Cleistogamy inBrassica napus

Arnaud

Belcram

et al. 2012

The Plant Cell

View full text Add to dashboard Cite

show abstract

“…The gain owing to heterosis might be larger than the loss from the decreased selection intensity (a synthetic variety has to be based on several lines compared with only one line for a line variety) . The same could be true for other partially allogamous crops such as rape seed (Brassica napus ; Becker et al ., 1992), pigeonpea (Cajanus cajan ; Saxena et al ., 1993), pepper (Capsicum annuum ; Pochard et al ., 1992) and cotton (Gossypium sp . ; Lee, 1987) .…”

Section: Introductionmentioning

confidence: 99%

Factors determining the performance of synthetics in Vicia faba L. 1. Heterogeneity, heterozygosity, and degree of cross-fertilization

1994

View full text Add to dashboard Cite

The relative performance of synthetic varieties in faba beans (Vcia faba L .) as compared with line varieties is the result of the joint effect of several factors . Factors investigated in the present study were (1) effects of heterogeneity and (2) heterozygosity on agronomic performance, (3) genetic variance for the degree of cross-fertilization among inbred lines and (4) genetic variance among homozygous and heterozygous genotypes for yield . The evaluation was based on multilocational trials in Germany with 36 inbred lines and derived entries with contrasting population structure (levels of heterozygosity and heterogeneity) . When inbred lines and F1-hybrids are included in the same mixture of genotypes, the resulting heterogeneity had a positive effect on yield . Relative mid-parent heterosis for yield was between 33% and 51% . The average degree of cross-fertilization was 53 .5%, and its genetic standard deviation was 8 .3% . The estimates for genetic standard deviation for yield among inbred lines were between 3 .4 q/ha and 5 .3 q/ha . The highest yielding synthetic variety is expected to outyield markedly the highest yielding line . 77

show abstract

“…The genotypic variability in floral morphology, such as the presence of wrapped flowers (Byth et al, 1982), cleistogamy (Saxena et al, 1993) and the quantity of nectar produced (Zeng-Hong et al, 2011) also affect insect activity and degree of cross-pollination. Factors such as extended period of stigma receptivity (Dalvi and Saxena, 2009) and competitive advantage of foreign pollen in germination (Onim et al, 1979), pollen tube growth (Dutta and Deb, 1970), and fertilization (Reddy and Mishra, 1981) have also been reported to encourage crosspollination in this species.…”

Section: F Natural Cross-pollinationmentioning

confidence: 99%

Development and Commercialization of CMS Pigeonpea Hybrids

Saxena

Sharma

Vales

2018

Plant Breeding Reviews

View full text Add to dashboard Cite

The role of heterosis in enhancing productivity in food crops is well known. Legume breeders have not been able, however, to take advantage of this genetic phenomenon for a long time, due to biological restrictions, such as the requirement of high seeding rate and the inability to produce large quantities of F 1 hybrid seed. Recently, in pigeonpea (Cajanus cajan (L.) Millsp.), a breakthrough has been realized with the development and marketing of the world's first legume hybrid, ICPH 2671. The key for this achievement was breeding and using a stable cytoplasmic nuclear male sterility (CMS) system obtained from the cross between C. cajanifolius, a wild relative of pigeonpea, and the cultivated type. The inherent partial natural out-crossing of pigeonpea was knitted with this CMS system to facilitate economically-viable large-scale hybrid seed production. These developments provided opportunities to overcome the historic stagnant low yield (0.6-0.8 t ha-1) through heterosis breeding. Among hundreds of hybrid combinations tested, a cross between ICPA 2043 and ICPL 87119 (=ICPR 2671), designated as ICPH 2671, was the most promising, with >40% yield superiority (reaching yields above 3 t ha-1) over the prevalent cultivar 'Maruti', in multi-location, multi-year, on-station trials, as well as on-farm evaluations. The outstanding performance of ICPH 2671 led to its release in 2010 as the first medium duration commercial pigeonpea hybrid in India. Subsequently, two additional pigeonpea hybrids, ICPH 3762 and ICPH 2740 were also released

show abstract

Role of partial cleistogamy in maintaining genetic purity of pigeonpea

Cited by 18 publications

References 4 publications

A Dominant Point Mutation in a RINGv E3 Ubiquitin Ligase Homoeologous Gene Leads to Cleistogamy inBrassica napus

A Dominant Point Mutation in a RINGv E3 Ubiquitin Ligase Homoeologous Gene Leads to Cleistogamy inBrassica napus

Factors determining the performance of synthetics in Vicia faba L. 1. Heterogeneity, heterozygosity, and degree of cross-fertilization

Development and Commercialization of CMS Pigeonpea Hybrids

Contact Info

Product

Resources

About