HIGHLIGHTS Pollen grains of ten sunflower inbred lines were evaluated under normal and high temperature stress conditions. Two treatments three treatment times used as factors viability, pollen germination percentage tube length decreased with increasing time period. RL-86 ORI-73 showed excellent ability to withstand stress.

For an organized cross breeding program, information on heterotic grouping, perse performance, and commercial heterosis of newly introduced maize lines is required. Therefore, the present study was conducted to determine group, heterosis, crosses mean performance from IITA-Nigeria CIMMYT- Zimbabwe quality protein inbred lines. 36F1 progenies generated four testers nine lines, including standard...

Our objectives were to evaluate general and specific combining ability (SCA) genetic divergence among tropical maize inbred lines using single sequence repeat (SSR) markers. Thirteen crossed based on a complete diallel scheme. Hybrids three checks evaluated in lattice experimental design. Silk anthesis flowering, average plant height, ear white spot (Pantoea ananatis) gray leaf (Cercospora zeae...

Salinity stress is one of the most widespread soil problems next to drought, in rice growing areas. ReducingSodium (Na+), while maintaining Potassium (K+) uptake in rice are traits that would aid in salinity tolerance.Therefore, the identification of quantitative trait loci (QTLs) associated with those for Na+ and K+uptake, will enable breeders to use marker-assisted selection...

Early-generation hybrid fitness is difficult to interpret because heterosis can obscure the effects of hybrid breakdown. We used controlled reciprocal crosses and common garden experiments to distinguish between effects of heterosis and nuclear and cytonuclear epistasis among morphotypes and advanced-generation hybrid derivative populations in the Piriqueta caroliniana (Turneraceae) plant compl...

A set of 250 distinct, stable, and uniform backcross-derived inbred lines were developed in sunflower through 5 interspecific cross combinations involving 4 wild diploid annual species (Helianthus argophyllus, H. petiolaris, H. annuus, and H. debilis). The presence of the wild-species genome in these inbred lines was confirmed through higher chromosome associations (tri- and quadrivalents) at d...

LTHOUGH close inbreeding does divide a population up into lines, members A of which are in general very similar-wRIGHT claims there was never any difficulty in telling to which of his 23 lines of inbred guinea pigs any individual guinea pig belonged-it has often been observed that some characters in some lines become more variable with inbreeding. The characters for which this has been found to...

A field population of Heterodera glycines was inbred by a combination of controlled male-female matings and inoculation of soybean with second-stage juveniles (J2) from single cysts. The initial and four F inbred populations were subjected to random amplified polymorphic DNA analysis and were also tested for their ability to reproduce on race differentials. The RAPD patterns of the inbred popul...