Skip to main content
SLU:s publikationsdatabas (SLUpub)

Sammanfattning

BackgroundHeterobeltiosis is the phenomenon when the hybrid's performance is superior to its best performing parent. Banana (Musa spp. AAA) breeding is a tedious, time-consuming process, taking up to two decades to develop a consumer acceptable hybrid. Exploiting heterobeltiosis in banana breeding will help to select breeding material with high complementarity, thus increasing banana breeding efficiency. The aim of this study was therefore to determine and document the level of heterobeltiosis of bunch weight and plant stature in the East African highland bananas, in order to identify potential parents that can be used to produce offspring with desired bunch weight and stature after a few crosses.ResultsThis research found significant progressive heterobeltiosis in cross-bred 'Matooke' (highland cooking) banana hybrids, also known as NARITAs, when grown together across years with their parents and grandparents in Uganda. Most (all except 4) NARITAs exhibited positive heterobeltiosis for bunch weight, whereas slightly more than half of them had negative heterobeltiosis for stature. The secondary triploid NARITA 17 had the highest heterobeltiosis for bunch weight: 249% versus its 'Matooke' grandparent and 136% against its primary tetraploid parent. Broad sense heritability (across three cropping cycles) for yield potential and bunch weight were high (0.84 and 0.76 respectively), while that of plant stature was very low (0.0035). There was a positive significant correlation (P < 0.05) between grandparent heterobeltiosis for bunch weight and genetic distance between parents (r=0.39, P=0.036), bunch weight (r=0.7, P

Nyckelord

Bunch weight; East African highland banana; Genetic distance; Heterobeltiosis; Musa spp; NARITA

Publicerad i

BMC Plant Biology
2020, volym: 20, nummer: 1, artikelnummer: 489

SLU författare

UKÄ forskningsämne

Trädgårdsvetenskap/hortikultur
Genetik och förädling inom lantbruksvetenskap

Publikationens identifierare

  • DOI: https://doi.org/10.1186/s12870-020-02667-y

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/108288