Genotip in mikrookolje glede na položaj semena znotraj ploda vplivata na izbor semen kakavovca (Theobroma cacao L.) za vzgojo sadik

Daniel B. ADEWALE, Beatrice A. NDUKA

Povzetek


Vplivi mikrookolja znotraj plodne glavice na velikost semen, vigor sadik in pridelek biomase so bili preučevani pri štirih genotipih kakavovca v dveh zaporednih rastnih sezonah. Poskus je bil zasnovan na glavnih ploskvah in treh vrstah podploskev kot poskus z deljenkami glede na leto poskusa, genotipe in položaj semen znotraj glavice. Izmerjeni so bili dolžina, širina in višina semen kakavovca potem, ko so se plodovi odprli. Na štiri tedne so bili izmerjeni višina rastlin (PH), obseg debla (SG) in število listov (NOL); izmerjeni sta bili tudi biomasa korenin in poganjkov. Analiza variance je pokazala značilno povezavo (p ≤ 0,05) med položajem semen v plodu, genotipom, letom poskusa in nekatere interakcije med preučevanimi znaki. Poprečki vrednosti znakov semen glede na položaj v plodu so se razlikovali statistično značilno (p ≤ 0,05). Proksimalna, srednja in distalna pozicija v plodu so imele značilna mikrookolja. Osrednja votlina ploda je imela najdaljša, najširša in najtežja semena. Analiza trendov je pokazala naraščajoče vrednosti znakov NOL, PH in SG za vse štiri genotipe in položaj v plodu. Za dolžino semen so bili na osnovi GGE biplota identificirani genotipi CRIN Tc1, CRIN Tc2 in CRIN Tc3 kot najboljši za srednji, proksimalni in distalni položaj v plodu. Intralokularni prostor v plodu je vzpodbudil diferencialni razvoj semen in njihovo zorenje, kar je bilo očitno tudi na vigorju sejank.

Ključne besede


položaj semen; kakavovec; mikrookolje; GGE biplot; vigor sejank

Celotno besedilo:

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Literatura


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DOI: http://dx.doi.org/10.14720/aas.2020.115.2.1345

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