- Tytuł:
- Selection-based heritability of resistance to Pythium ultimum in safflower
- Autorzy:
-
Nikmanesh, Elham
Pahlevani, Mohammadhadi
Razavi, Seyed Esmaeil - Powiązania:
- https://bibliotekanauki.pl/articles/2199691.pdf
- Data publikacji:
- 2012-08-20
- Wydawca:
- Instytut Hodowli i Aklimatyzacji Roślin
- Tematy:
-
additive
emergence
genotype
seed
zoospore - Opis:
- Damping-off disease caused by Pythium ultimum can kill both germinating seeds and young seedlings and cause considerable damage in safflower cultivation. An estimation of heritability lets safflower breeders determine the most effective method for improving seedling emergence in soils infected with P. ultimum, the causal agent of seed rot and damping-off. Two cycles of selection were performed to estimate the realized heritability of resistance to the pathogen in five safflower populations. Undamaged seedlings were selected as resistant individuals and were kept to produce seed. The results showed that selection for two consecutive generations increased the emergence of seedlings in Pythium-infected soil from 46 to 53 %. The heritability estimates varied between 1.72 and 77.66 % over the genotypes and environments, in inverse proportion to the severity of the disease. Estimates of heritabilities showed that genes conferring resistance to P. ultimum in safflower are highly heritable and would respond to selection breeding, particularly in some of the studied genotypes, like Isfahan and Zarghan259. However, different breeding methods must be explored for other genotypes.
- Źródło:
-
Plant Breeding and Seed Science; 2012, 66; 109-118
1429-3862
2083-599X - Pojawia się w:
- Plant Breeding and Seed Science
- Dostawca treści:
- Biblioteka Nauki
Artykuł