Protandry is observed in____________________?
Show answer Hide answer
Answer: C. Maize
Explanation
Protandry is a reproductive trait where male flowers mature before female flowers on plants. This temporal separation of floral maturity is a well documented characteristic of maize plants. Maize sheds pollen from tassels before silks emerge from the developing ears below. Dichogamy is a floral mechanism that prevents self fertilization through temporal separation. Maize produces separate male inflorescences and female inflorescences on the same plant body. Cross pollination is strongly favored when male and female reproductive organs mature at different times.
Protandry influences hybrid seed production techniques and detasseling procedures in maize fields. Understanding floral phenology helps agronomists optimize planting dates for optimal pollination success. This natural trait reduces inbreeding depression by encouraging pollen exchange between neighboring plants. Option a is incorrect because wheat flowers are typically homogamous and predominantly self pollinating. Option b is wrong since sorghum florets generally mature their anthers and stigmas simultaneously. Option d is incorrect because barley exhibits strict self pollination without protandry traits.
- Subject
- Agriculture
- Category
- Agriculture
- Topic
- —
- Difficulty
- medium
Related questions
Q1. Under long-term conservation protocols, germplasm can be retained up to____________________?
Show answer Hide answer
Answer: C. 100 years
Long term conservation protocols in cryogenic gene banks can preserve seed viability for a century. Storing seeds at ultra low temperatures drastically slows down metabolic aging and degradation processes. Orthodox seeds...
Q2. Alfalfa (lucerne) contains toxic compounds located within_____________________?
Show answer Hide answer
Answer: A. Saponin
Alfalfa plants naturally synthesize bioactive anti-nutritional compounds known chemically as saponins. These secondary metabolites act as chemical defenses against herbivores and various microbial pathogens. Saponins are...
Q3. Traditional landraces selected and grown by agriculturists over generations are___________________?
Show answer Hide answer
Answer: C. Land races
Traditional cultivars developed and continuously selected by farmers over generations are called landraces. These populations adapt organically to local environmental conditions through long term farmer selection. Landra...
Q4. The International Institute of Tropical Agriculture is positioned at______________________?
Show answer Hide answer
Answer: B. Nigeria
The International Institute of Tropical Agriculture has its main headquarters situated in Nigeria. IITA operates research stations across Africa to improve agricultural productivity in tropical regions. IITA headquarters...
Q5. Line x tester evaluation yields insights concerning:________?
Show answer Hide answer
Answer: D. All of these
Line by tester evaluation provides plant breeders with estimates of combining ability variances. This mating design also calculates specific combining ability and general combining ability effects. Gene action components...
Q6. A homozygous population consists of_________________?
Show answer Hide answer
Answer: D. All the above
A homozygous population consists of individuals with identical allele pairs at their genetic loci. Pure lines developed through repeated self pollination belong to this homozygous category. Inbred lines are intentionally...