Ali moška sterilnost vpliva na kalitev in preživetje potomcev? Primer raziskave na jagodnjakih (Fragaria)

Houshang NOSRATI

Povzetek


Raziskave vloge staršev na uspevanje potomcev so pri rastlinah pogosto osredotočene na ženskega straša, manj pozornosti je posvečeno vlogi moškega starša. Ta raziskava je preučevala vpliv moške sterilnosti peloda (v razponu od 3,1 do 77,2 %) na kalitev in preživetje F1 potomcev jagodnjaka (Fragaria, Rosaceae) po kontroliranih križanjih. Po križanju gozdnega jagodnjaka (F. vesca L. ssp. vesca) moška sterilnost peloda ni korelirala s kalitvijo F1 semen (N = 14, p > 0.074) in preživetjem potomcev (N = 14, p > 0. 0.710). Enako moška sterilnost po križanjih med taksonoma F. vesca ssp. vesca in F. vesca ssp. monophylla ni imela vpliva na kalitev F1 semen (N = 7, p > 0.295) in preživetje potomcev (N = 6, p > 0.812). Podobno ni bila ugotovljena korelacija med moško pelodno sterilnostjo in kalitvijo F1 semen (N = 6, p > 0.924) ter preživetjem potomcev (N = 6, p > 0.215) po križanjih med taksonomoma F. vesca ssp. americana in F. vesca ssp. vesca. Še več, po križanjih različnih materinskih rastlin s pelodom iste očetovske rastline je imelo po vseh treh vrstah križanj potomstvo spremenljivo kalivost F1 semen in spremenljivo preživetje. Ti rezultati kažejo na odločilno vlogo materinskega starša na uspevanje potomcev in podpirajo splošno idejo o ključni, večji vlogi materinske rastline primerjalno z očetovsko.

Ključne besede


jagode; fragaria; materinski vpliv; očetovski vpliv; uspevanje potomcev; reproduktivni potencial; starševski vpliv; jagodnjak

Celotno besedilo:

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Literatura


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DOI: http://dx.doi.org/10.14720/aas.2014.103.2.13

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