Male Sterility in Higher Plants

Kaul, M. L. H.

doi:10.1007/978-3-642-83139-3

Cited by 536 publications

(430 citation statements)

References 0 publications

Supporting

Mentioning

409

Contrasting

Unclassified

Order By: Relevance

“…Cryptic CMS in plants, where mismatch between organellar and nuclear genes results in hybrid male sterility, epitomizes this gap. Despite abundant evidence that cryptic CMS is common [21,23,24] and robust theory that it should evolve selfishly [28], the links between pattern and process have been circumstantial to date [31]. Here, we present, to our knowledge, the first direct evidence that mitochondrial CMS loci and associated nuclear restorers have evolved under the positive selection predicted by the conflict model.…”

Section: Discussionmentioning

confidence: 71%

“…In flowering plants, a common form of hybrid incompatibility is cytonuclear male sterility (reviewed in [4,21,22]). Cytoplasmic male sterility (CMS) loci and their nuclear restorers of fertility (Rf ) not only cause asymmetric reproductive incompatibility between hermaphroditic species [23][24][25], but they are also classic examples of selfish genetic elements and suppressors [16,19].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Selfish evolution of cytonuclear hybrid incompatibility inMimulus

et al. 2016

View full text Add to dashboard Cite

Intraspecific coevolution between selfish elements and suppressors may promote interspecific hybrid incompatibility, but evidence of this process is rare. Here, we use genomic data to test alternative models for the evolution of cytonuclear hybrid male sterility in Mimulus. In hybrids between Iron Mountain (IM) Mimulus guttatus Â Mimulus nasutus, two tightly linked M. guttatus alleles (Rf1/Rf2) each restore male fertility by suppressing a local mitochondrial male-sterility gene (IM-CMS). Unlike neutral models for the evolution of hybrid incompatibility loci, selfish evolution predicts that the Rf alleles experienced strong selection in the presence of IM-CMS. Using whole-genome sequences, we compared patterns of population-genetic variation in Rf at IM to a neighbouring population that lacks IM-CMS. Consistent with local selection in the presence of IM-CMS, the Rf region shows elevated F ST , high local linkage disequilibrium and a distinct haplotype structure at IM, but not at Cone Peak (CP), suggesting a recent sweep in the presence of IM-CMS. In both populations, Rf2 exhibited lower polymorphism than other regions, but the low-diversity outliers were different between CP and IM. Our results confirm theoretical predictions of ubiquitous cytonuclear conflict in plants and provide a population-genetic mechanism for the evolution of a common form of hybrid incompatibility.

show abstract

Section: Discussionmentioning

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Selfish evolution of cytonuclear hybrid incompatibility inMimulus

et al. 2016

View full text Add to dashboard Cite

show abstract

“…In many gynodioecious species, however, sex is determined by an interaction between nuclear and cytoplasmic genes (Lewis 1941;Kaul 1988). Cytoplasmic genes cause pollen abortion and male sterility (called cytoplasmic male sterility (CMS)).…”

Section: Introductionmentioning

confidence: 99%

Soil moisture and sex ratio in a plant with nuclear–cytoplasmic sex inheritance

Barr

2004

Proc. R. Soc. Lond. B

View full text Add to dashboard Cite

I investigated whether soil moisture affects relative fitness of females and hermaphrodites and sex ratio in a gynodioecious plant with nuclear-cytoplasmic sex inheritance. I contrast these results with those from species with strictly nuclear sex inheritance. I performed a manipulative watering experiment on seed fitness of the two sexes, and field studies measuring seed fitness and sex ratio as a function of soil moisture. In the dry site, watered hermaphrodites produced approximately twice as many seeds as unwatered hermaphrodites, with little treatment effect on female seed production. Over a natural soil moisture gradient, the ratio of female to hermaphrodite seed production was higher in dry than in wet sites. These data show that the seed fitness advantage of females is a function of soil moisture. Despite this, regression of soil moisture on the sex ratio of 23 populations was not significant. These results indicate a sex-dependent effect of soil moisture on resource allocation to seeds that does not translate into a strong effect on sex ratio. This is consistent with theory based on genomic conflict in which sex ratios are predicted to be only partly determined by fitness differences of the sexes.

show abstract

“…This will not only enrich genetic variability among hybrid parents but also protect the crop against any potential danger of cytoplasmic uniformity, as experienced with Tcytoplasm of maize in 1970 that was responsible for diseases like southern leaf blight (caused by Helminthosporium maydis) and yellow leaf blight (caused by Phyllosticta maydis). Subsequently, the use of T-cytoplasm was virtually abandoned in hybrid maize breeding programs in the US corn belt (Kaul 1988).…”

Section: Development Of a New Cms System From A Natural Hybrid Plantmentioning

confidence: 99%

Insect-aided natural out-crossing in four wild relatives of pigeonpea

Saxena

Kumar

2009

Euphytica

View full text Add to dashboard Cite

Insect-aided natural out-crossing in pigeonpea [Cajanus cajan (L.) Millsp.] is a common event. It is considered to be a prime constraint in maintaining genetic purity of cultivars and genetic stocks. On the contrary, the out-crossing has also been exploited to select high-yielding varieties from landraces. This paper, for the first time, reports natural out-crossing in four wild relatives of pigeonpea. The highest (17.1%) natural out-crossing was recorded in C. lineatus and it was comparable to the control cultivar Asha (22.2%). C. albicans and C. scarabaeoides exhibited 10.0 and 8.3% outcrossing, respectively. C. sericeus was found to have lowest (2.3%) natural out-crossing. A process of breeding a new cytoplasmic-nuclear male-sterility (CMS) system arising from a natural hybrid of C. lineatus has also been described. Once stabilized, this CMS will be used in breeding programs aimed to develop high-yielding pigeonpea hybrids.

show abstract

Male Sterility in Higher Plants

Cited by 536 publications

References 0 publications

Selfish evolution of cytonuclear hybrid incompatibility inMimulus

Selfish evolution of cytonuclear hybrid incompatibility inMimulus

Soil moisture and sex ratio in a plant with nuclear–cytoplasmic sex inheritance

Insect-aided natural out-crossing in four wild relatives of pigeonpea

Contact Info

Product

Resources

About