Fertility in Lilium hybrids

Interspeci®c hybrids between Lilium nobilissimum and L. regale produced via ovules-with-placental-tissue culture

Reciprocal pollination was made between Lilium nobilissimum and L. regale. Pollen tubes reached the base of style within 144 h after pollination, but no mature seeds were obtained in either cross combination. Explants, or ovules-with-placental-tissue excised from each carpel 30 and 40 days after pollination (DAP), were cultured on a medium composed of major salts of B-5 macronutrient (Gamborg, ...

Fertility of Taricha Species-hybrids and Viability of Their Offspring.

Pollen fertility Vs Spikelet fertility in F2 of a CMS based hybrids in rice (Oryza sativa L.) under Aerobic condition

Identification of maintainer and restorers from rice germplasm through test crossing is the initial step in three line heterosis breeding. Maintainer lines can be converted into cytoplasmic male sterile lines to utilize in development of rice hybrids. Restorer lines can be used as males to produce F1 hybrids. Three hundred F2 plants of the cross KCMS 26A X IET 19886 were grown under aerobic sit...

Prdm9 Incompatibility Controls Oligospermia and Delayed Fertility but No Selfish Transmission in Mouse Intersubspecific Hybrids

PR-domain 9 (Prdm9) is the first hybrid sterility gene identified in mammals. The incompatibility between Prdm9 from Mus musculus domesticus (Mmd; the B6 strain) and the Hstx2 region of chromosome (Chr) X from M. m. musculus (Mmm; the PWD strain) participates in the complete meiotic arrest of mouse intersubspecific (PWD×B6)F1 hybrid males. Other studies suggest that also semisterile intersubspe...

Hybrids and amphiploids of Aegilops ovata L. with Secale cereale L.: production, morphology and fertility.

Hybrids (2n = 3x = 21) between Aegilops ovata and Secale cereale were produced via embryo rescue. Most hybrid morphological traits were intremediate between parents, the plants grew vigorously but were completely sterile. The average frequency of chromosome associations at metaphase I was 19.57-20.19 univalents and 0.40-0.86 rod bivalents. The fertility of the hybrids was restored by doubling t...