Amphidiploid hybrids of Trifolium pratense L. [2n=14 and 2] with T.diffusum Ehrh. [2n=16]

• Autorzy: Strzyzewska C
• Języki publikacji: EN

Abstrakty

EN

After duplicating the chromosome number by colchicine in sterile F₁ 16-chromosome hybrid T. pratense × T. diffusum some partially fertile plants with 32 chromosomes were found. Male fertility (viability of pollen grain) was from 69.3% to 86.2% (on average 81.8%), whereas female fertility estimated as seed setting after cross- and self-pollination was 21.8% and 6.9%, respectively. Male and female fertility as well as somatic chromosome number were examined in the F₂-F₄ generations. Selection for female fertility resulted in increasing seed setting in the first two generations (F₂ and F₃) and in decreasing it in F₄ generation. An average seed setting in the F₂-F₄ generations after cross-pollination amounted to 22.2%, 43.6% and 12.9%, respectively; after self-pollination it was 25.2%, 27.6% and 1.9%. In the F₂ generation all the plants had 2n=32 chromosomes. In the next generations there appeared aneuploids, among which 30-chromosome individuals were predominant.

Słowa kluczowe

EN

chromosome; Trifolium diffusum; Trifolium pratense; hybrid; interspecific hybrid; plant breeding; genetic variation

• Wydawca: -
• Czasopismo: Journal of Applied Genetics
• Rocznik: 1995
• Tom: 36
• Numer: 2
• Opis fizyczny: p.147-154,fig.

Twórcy

autor

Strzyzewska C

• Polish Academy of Sciences, Strzeszynska 34, 60-479 Poznan, Poland

Bibliografia

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