Inheritance and linkage relationships of days to flower and morphological loci in lentil (Lens culinaris Medikus subsp. culinaris)

Article Abstract:

Temperature and photoperiod modulate time to flower in lentil, according to research designed to establish the genetic control and linkage connections between genes that determine days to flower and genes for morphological traits such as peduncle pubescence. In both lentils grown in India and lentils grown in Syria, days to flower in the F1 in all crosses was significantly later than the midparental value and almost equal to that of the late parent. This shows that late flowering is dominant over early flowering. The genotype of a homozygous dominant plant is Tnl/Tnl, with a homozygous recessive plant being tnl/tnl.

Genetic aspects, Plants, Flowering of, Plant flowering, Lentils

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The relative contributions of seed and pollen movement to the local genetic structure of Silene alba

Article Abstract:

The relative contributions of seed and pollen movement to overall gene flow among populations of Silene alba, an insect-pollinated weedy plant which is widely dispersed in southwestern Virginia, are scale dependent. This was established by estimating genetic structure from among-population allele frequency variation using allozymes and chloroplast DNA (cpDNA). This research raises wider questions about the application of maternally inherited genetic markers to matters related to plant population biology.

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Differences in pollen-tube growth rate and reproductive isolation between Louisiana irises

Article Abstract:

Temporal variation in cross pollination using heterospecific and conspecific pollen was used in the investigation of the relative contribution of pollen tube growth and attrition in reproductive isolation in two naturally hybridizing species of irises, Iris fulva and I. brevicaulis. Results indicate that pollen tube growth is an isolating mechanism in sexual reproduction but it has a more dominant contribution in I. fulva.

Fertilization of plants, Plant fertilization, Pollen tube, Iris (Plant), Irises (Plants)

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