Genetics and Plant Breeding Pointers 5 ✓

 

• Group of symptoms is called a Syndrome.
• Grow out test is used for assessing genetic purity of seeds.
• Guanine pairs with cytosine via 3 hydrogen bonds.
• H. B. Singh contributed to germplasm collection.
• H. J. Muller received Nobel Prize for inducing mutations in Drosophila using X-rays.
• Haploid-Diploid sex determination occurs in honey bees and wasps.
• Incomplete penetrance refers to heterozygous condition not fully expressing the normal phenotype.
• Ophioglossum (Pteridophyta) has the highest chromosome number (2n > 1200).
• Highly condensed chromatin is called Heterochromatin.
• H. J. Muller used X-rays to induce mutations in fruit flies.
• Rice has 22 wild species.
• Sunflower oil contains about 90% polyunsaturated fatty acids (PUFA).
• Male sterility is maintained by crossing A line with B line.
• Human blood groups are an example of multiple alleles.
• Luxuriance in hybrids was described by Naudin.
• H4 cotton variety was developed at GAU, Surat.
• Half diallel cross formula is n(n−1)/2.
• Hand pollination in seed production is practiced in cotton.
• Anther culture is used to develop haploids.
• Haploids exhibit weak phenotype.
• Haploid with an isochromosome is called Mis-division haploid.
• Harlan proposed the mass pedigree method.
• Herkogamy prevents self-pollination due to physical barriers (e.g., alfalfa).
• Hershey and Chase used ³²P to label DNA in their experiments.
• Heterostyly promotes cross-pollination via differing style and filament lengths (e.g., linseed).
• Segregation releases heterozygotic potential variability.
• Potential variability is hidden variability not accessible for selection.
• High benzyl alcohol in wheat provides resistance to green bugs.
• High silica in rice provides resistance to yellow stem borer.
• Bulk breeding gives highest genetic variance in population.
• Single cross hybrids show highest uniformity.
• Maize is a highly cross-pollinated species.
• High inbreeding depression is observed in alfalfa and carrot.
• Hotspots are highly mutable sites within a gene.
• Histones are rich in lysine and arginine.
• Holiday proposed a model for homologous recombination.
• Homeologous chromosomes are present in wheat.
• Homogamy refers to synchronous maturation of male and female gametes.
• Orthologues are homologous genes within the same organism with similar functions.
• Homomorphic self-incompatibility is physiological, not morphological.
• Homomorphic systems include gametophytic and sporophytic types.
• Horizontal resistance is non-specific resistance.
• Horizontal axis in graphs is called the Abscissa (X-axis).
• Hotspots for Karnal bunt include Ludhiana, Surdaspur, Hisar, and Shimla.