Biological Factors Affecting Seed Production in East African Highland Bananas

Ssebuliba, R.; Magambo, M. J. S.; Talengera, David; Makumbi, Dan; Tenkouano, A.; Rubaihayo, P. R.; Pillay, Michael

doi:10.1300/j411v16n01_05

Cited by 17 publications

(29 citation statements)

References 7 publications

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“…Fairly reliable comparisons were made between the control and technique 2 since a considerable number of bunches were fairly distributed in different months of year during the study period (Supplementary Tables 5, 6, and 7). Ssebuliba et al (2006b) found that bracts of distal female hands opened to a bigger angle than that of proximal hands. This phenomenon was linked to a response of stigma receptivity which increased from proximal to distal hands.…”

Section: Discussionmentioning

confidence: 96%

“…The observed bias of seed set in distal hands especially in Matooke has been attributed to the high stigma receptivity in distal hands (Ssebuliba et al, 2006b). But if this were entirely true, then the use of PGM on stigmas would have increased seed set in the proximal hands as well since all hands are pollinated.…”

Section: Discussionmentioning

confidence: 99%

“…Besides, significant differences in seed set for hand position have been observed in EAHBs and this was linked to stigma receptivity (Ssebuliba et al, 2006b). Distal hands were found to have more receptive stigmas than proximal hands thus the higher fertility in distal hands.…”

Section: Introductionmentioning

confidence: 94%

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Seed Set Patterns in East African Cooking Bananas are Asymmetric in Bunches and Fruits

Waniale¹,

Mukasa²,

Tugume³

et al. 2020

Preprint

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Background: Low female fertility in bananas is the biggest hurdle for banana breeding. The aim of this study was to determine seed set patterns in East African cooking bananas EACBs to inform future decisions on a more targeted approach of increasing seed set and subsequently banana breeding efficiency. Matooke (AAA) and Mchare (AA) bananas are genetically distinct but belong to the same genetic complex, they referred to as EACBs. Seed set patterns in ‘Enzirabahima’ (AAA), ‘Mshale’ (AA) and ‘Nshonowa’ (AA) all with residual fertility were examined after hand pollination with a highly male fertile wild banana ‘Calcutta 4’ (AA). Results: Seed set in ‘Enzirabahima’ is predominant in distal hands. Mchare cultivars have a slightly more even distribution of seeds in their hands compared to ‘Enzirabahima.’ There is a gradual increase in seed set from proximal to distal hands with a slight drop in the last hand. This pattern is more definite in ‘Enzirabahima’ and ‘Mshale’ while ‘Nshonowa’ has a somewhat inconsistent pattern. There is also a drop in seed set per 100 fruits per hand from small to larger bunches. However, larger bunches have a higher pollination success compared to smaller bunches. They therefor set more seed on 100 fruits per hand and per bunch basis if bunches without seed are accounted for. Pollination success rate increases from smaller to larger bunches of EACBs. Seed set is biased toward the distal third part of fruits of examined EACBs as well tetraploid Matooke hybrid ‘401K-1’ (AAAA) and improved diploid ‘Zebrina’ GF (AA) that were used for comparison. In comparison, in the highly female fertile ‘Calcutta 4,’ seed set is along the entire length of the fruit.Conclusion: Seed set bias in the distal hands and distal end of fruits suggests a systematic mechanism rather than a random occurrence. It is expected that this information will provide a foundation for increased crossbreeding efficiency in bananas.

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Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Seed Set Patterns in East African Cooking Bananas are Asymmetric in Bunches and Fruits

Waniale¹,

Mukasa²,

Tugume³

et al. 2020

Preprint

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“…All pollinations were made at the National Agricultural Research Laboratories (NARL) -Kawanda station located at latitude 0° 25' N, longitude 32° 32' E at an elevation of 1,177 m above sea level. The soils at Kawanda are sandy-loams of the deep ferrallitic clay type with a pH range of 5.5-6.0 (Ssebuliba et al 2006b). Daily weather attributes in the study period are summarized in Table 1.…”

Section: Methodsmentioning

confidence: 99%

Seed Set Patterns in East African Cooking Bananas (Musa spp.) are Dependent on Weather Before, During, and After Pollination

Waniale

Mukasa

Tugume

et al. 2020

Preprint

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Abstract Background: Seed set in banana (Musa spp.) is influenced by weather but the most critical weather attribute(s) and the critical period are unknown. Such information is of paramount importance to increase seed set for banana breeding programs. Three female fertile East African cooking bananas (EACBs), ‘Enzirabahima’ (AAA), ‘Mshale’ (AA), and ‘Nshonowa’ (AA) were pollinated with the highly male fertile wild banana ‘Calcutta 4’ (AA). At full maturity, bunches were harvested and ripened and seeds extracted from ripe fruit pulp. Seed set was then correlated with weather before, during, and after pollination.Results: Seed set was positively correlated with high temperatures (r=0.172 – 0.488), solar radiation (r=0.181 – 0.282) and negatively correlated with rainfall (r=-0.214 – -0.238) and relative humidity (RH) (r=-0.158 – -0.438) between 75 and 15 days before pollination (DBP). The pattern of weather association was cultivar-dependent with ‘Nshonowa’ having the strongest significant associations. At the time of pollination, high average temperatures were critical for seed set in ‘Enzirabahima’ (r=0.214, P<0.01) while high morning RH was critical for ‘Mshale’ (r=0.299, P<0.01). After pollination, high morning temperatures were associated with seed set (r=0.150 – 0.429) between 15 days to 90 days after pollination (DAP). High average temperatures were negatively correlated with seed set in ‘Mshale’ and ‘Nshonowa’ from 45 DAP to time of harvest (r=-0.208 – -0.344). Coefficients of correlation were generally highest 15 DBP especially for ‘Mshale’ and ‘Nshonowa.’ Principle component analysis showed that average and maximum temperature are the most important variables in the entire data set. Conclusion: Coefficients of correlation were generally less than 0.5 partly as a result of weather involvement in seed set at several floral development stages; before, during, and after pollination. The most critical developmental stage is 15 DBP especially for ‘Mshale’ and ‘Nshonowa’ as they had the high correlation coefficients. Average temperature should be the main focus for seed set increase in banana.

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“…However, among cultivated bananas and plantains generally, pollination never or seldom results in seeds (e.g. Ortiz and Crouch, 1997;Ssebuliba et al, 2006a). Seedlessness is due to a complex of causes involving sterility genes, polyploidy, and chromosomal structural changes in varying degrees depending on the cultivar or particular clone (Section VI).…”

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confidence: 99%

Safety Assessment of Transgenic Organisms, Volume 4

2010

Harmonisation of Regulatory Oversight in Biotechnology

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io s a fe t y nv ir on me nt ag ri cu lt ur e bi os af et y g r ic u lt u r e e n vi r o n m e n t gr ic ul tu re bi os af et y en vi ro nm en t n vi r o n m e n t b io s a fe t y a g r ic u lt u r e e n vi r o io sa fe ty en vi ro nm en t ag ri cu lt ur e bi os af et y en vi ro nm en t ag ri cu lt ur e bi os af et y en v io s a fe t y a g r ic u lt u r e e n vi r o n m e n t b io s a fe t y a g r ic u lt u r e e n vi r o n m e n t nv ir on me nt ag ri cu lt ur e bi os af et y en vi ro nm en t ag ri cu lt ur e bi os af et y en vi ro nm en t ag ri cu lt ur e bi os af et y en vi ro nm e g r ic u lt u r e e n vi r o n m e n t b io s a fe t y a g r ic u lt u r e e n vi r o n m e n t b io s a fe t y a g r ic u lt u r e e n vi r o n m e n t b io s a f gr ic ul tu re bi os af et y en vi ro nm en t ag ri cu lt ur e bi os af et y en vi ro nm en t ag ri cu lt ur e bi os af et y en vi ro nm en t ag ri cu lt ur e bi os af et y en vi ro nm en t a n vi r o n m e n t b io s a fe t y a g r ic u lt u r e e n vi r o n m e n t b io s a fe t y a g r ic u lt u r e e n vi r o n m e n t b io s a fe t y a g r ic u lt u io sa fe ty en vi ro nm en t ag ri cu lt ur e bi os af et y en vi ro nm en t ag ri cu lt ur e bi os af et y en vi ro nm en t ag ri cu lt ur e bi os af et y en vi ro nm en t ag ri cu lt ur e b io s a fe t y a g r ic u lt u r e e n vi r o n m e n t b io s a fe t y a g r ic u lt u r e e n vi r o n m e n t b io s a fe t y a g r ic u lt u r e e n vi r o n m nv ir on me nt ag ri cu lt ur e bi os af et y en vi ro nm en t ag ri cu lt ur e bi os af et y en vi ro nm en t ag ri cu lt ur e bi os af et y en vi ro nm en t ag ri cu lt ur e bi os af et y en g r ic u lt u r e e n vi r o n m e n t b io s a fe t y a g r ic u lt u r e e n vi r o n m e n t b io s a fe t y a g r ic u lt u r e e n vi r o n m e n t b io s a f gr ic ul tu re bi os af et y en vi ro nm en t ag ri cu lt ur e bi os af et y en vi ro nm en t ag ri cu lt ur e bi os af et y en vi ro nm en t ag ri cu lt ur e bi os af et y en vi ro nm en t a n vi r o n m e n t b io s a fe t y a g r ic u lt u r e e n vi r o n m e n t b io s a fe t y a g r ic u lt u r e e n vi r o n m e n t b io s a fe t y a g r ic u lt u io sa fe ty en vi ro nm en t ag ri cu lt ur e bi os af et y en vi ro nm en t ag ri cu lt ur e bi os af et y en vi ro nm en t ag ri cu lt ur e bi os af et y en vi ro nm en t ag ri cu lt ur e b io s a fe t y a g r ic u lt u r e e n vi r o n m e n t b io s a fe t y a g r ic u lt u r e e n vi r o n m e n t b io s a fe t y a g r ic u lt u r e e n vi r o n m e nv ir on me nt ag ri cu lt ur e bi os af et y en vi ro nm en t ag ri cu lt ur e bi os af et y en vi ro nm en t ag ri cu lt ur e bi os af et y en vi ro nm en t ag ri cu lt ur e bi os af et y e g r ic u lt u r e e n vi r o n m e n t b io s a fe t y a g r ic u lt u r e e n vi r o n m e n t b io s a fe t y a g r ic u lt u r e e n vi r o n m e n t b io s a f ag ri cu lt ur e bi os af et y en vi ro nm en t ag ri cu lt ur e bi os af et y en vi ro nm en t ag ri cu lt ur e bi os af et y en vi ro nm en t ag ri cu lt ur e bi os af et...

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Biological Factors Affecting Seed Production in East African Highland Bananas

Cited by 17 publications

References 7 publications

Seed Set Patterns in East African Cooking Bananas are Asymmetric in Bunches and Fruits

Seed Set Patterns in East African Cooking Bananas are Asymmetric in Bunches and Fruits

Seed Set Patterns in East African Cooking Bananas (Musa spp.) are Dependent on Weather Before, During, and After Pollination

Safety Assessment of Transgenic Organisms, Volume 4

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