Abstract
Species crosses using Cucurbifa pepo var. “Nishikikanro" as the staminate parent did not produce F1 hybnds when the usual open flowver pollinations were made at 7 a.m. on the day of anthesis, probably because pollen germination in this variety is low after anthesis, while the receptivity of the pistillate species is maximum after anthesis The author succeded in making these difficult crosses by storing at lO°C the staminate flowers that harvested at 10 p.m. the day prior to anthesis. All characteristics of these two F1 hybrids are similar to those of their reciprocal hybrids except for a peculiar fact. From the same fruit of C. maxima x C. pepo two types of fruit shape appeared, differing in the region of blossom-end. Cross-compatiblity of C. pepo var. "Connecticut Field" is high, judging from the successful results of species crosses by several earlier workers, while that of "Nishikikanro" is low in the usual open flower pollination. One of the main causes may be the remarkable physiological changes that occur with different flower age m "Nishikikanro" The production of F1 hybrids between "Nishikikanro" and two other species was not successful in the usual open flower pollinations at 7 a.m. of the flowering day, but was successful in the following combinations of different ages. 1. Early open flower pollination at 4 a.m.of the flowering day ; C. pepo x C. moschata. 2. Bud pollination at at 7 a.m. of the day before anthesis ; C. pepo x C. maxima. 3. Open flower pollination at 7 a.m. of the flowering day with pollen from male flowers stored at 1O°C from 10 p.m. of the day before anthesis ; C. maxima x C. pepo and C. moschata x C. papo.
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Claims 10
Claim · model-written summary
Usual 7 a.m. open flower pollination with Nishikikanro as pollen parent did not yield F1 hybrids.
- Taxon
- C. pepo, C. moschata and C. maxima
Cucurbita maxima
Cucurbita moschata
Cucurbita pepot0 - Material
- “Nishikikanro"e0
- Treatment
- usual open flowver pollinationse0
- Outcome
- did not produce F1 hybndse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Species crosses using Cucurbifa pepo var. “Nishikikanro" as the staminate parent did not produce F1 hybnds when the usual open flowver pollinations were made at 7 a.m. on the day of anthesis”
t0“C. pepo, C. moschata and C. maxima”
Claim · model-written summary
Storing preanthesis staminate flowers at 10°C enabled the difficult species crosses.
- Taxon
- C. pepo, C. moschata and C. maximaCucurbita maximaCucurbita moschataCucurbita pepot0
- Organ / stage
- staminate flowerse0
- Treatment
- storing at lO°C the staminate flowerse0
- Outcome
- succeded in making these difficult crossese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The author succeded in making these difficult crosses by storing at lO°C the staminate flowers that harvested at 10 p.m. the day prior to anthesis.”
t0“C. pepo, C. moschata and C. maxima”
Claim · model-written summary
The two F1 hybrids resembled their reciprocal hybrids in most characteristics.
- Taxon
- C. pepo, C. moschata and C. maximaCucurbita maximaCucurbita moschataCucurbita pepot0
- Outcome
- characteristics of these two F1 hybrids are similare0
- Comparator
- their reciprocal hybridse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All characteristics of these two F1 hybrids are similar to those of their reciprocal hybrids except for a peculiar fact.”
t0“C. pepo, C. moschata and C. maxima”
Claim · model-written summary
Two blossom end fruit shapes appeared from the same C. maxima × C. pepo fruit.
- Taxon
- C. pepo, C. moschata and C. maximaCucurbita maximaCucurbita moschataCucurbita pepot0
- Organ / stage
- fruite0
- Outcome
- two types of fruit shape appearede0
- Qualifier
- differing in the region of blossom-ende0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“From the same fruit of C. maxima x C. pepo two types of fruit shape appeared, differing in the region of blossom-end.”
t0“C. pepo, C. moschata and C. maxima”
Claim · model-written summary
Connecticut Field showed high cross compatibility.
- Taxon
- C. pepo, C. moschata and C. maximaCucurbita maximaCucurbita moschataCucurbita pepot0
- Material
- "Connecticut Field"e0
- Outcome
- Cross-compatiblitye0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cross-compatiblity of C. pepo var. "Connecticut Field" is high”
t0“C. pepo, C. moschata and C. maxima”
Claim · model-written summary
Nishikikanro showed low compatibility under usual open flower pollination.
- Taxon
- C. pepo, C. moschata and C. maximaCucurbita maximaCucurbita moschataCucurbita pepot0
- Material
- "Nishikikanro"e0
- Outcome
- that of "Nishikikanro" is lowe0
- Direction
- lowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“that of "Nishikikanro" is low in the usual open flower pollination.”
t0“C. pepo, C. moschata and C. maxima”
Claim · model-written summary
Early 4 a.m. pollination produced C. pepo × C. moschata hybrids.
- Taxon
- C. pepo, C. moschata and C. maximaCucurbita maximaCucurbita moschataCucurbita pepot0
- Treatment
- Early open flower pollination at 4 a.m.of the flowering daye0
- Outcome
- C. pepo x C. moschatae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Early open flower pollination at 4 a.m.of the flowering day ; C. pepo x C. moschata.”
t0“C. pepo, C. moschata and C. maxima”
Claim · model-written summary
Preanthesis bud pollination produced C. pepo × C. maxima hybrids.
- Taxon
- C. pepo, C. moschata and C. maximaCucurbita maximaCucurbita moschataCucurbita pepot0
- Treatment
- Bud pollination at at 7 a.m. of the day before anthesise0
- Outcome
- C. pepo x C. maximae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bud pollination at at 7 a.m. of the day before anthesis ; C. pepo x C. maxima.”
t0“C. pepo, C. moschata and C. maxima”
Claim · model-written summary
Pollination using stored pollen produced C. maxima × C. pepo hybrids.
- Taxon
- C. pepo, C. moschata and C. maximaCucurbita maximaCucurbita moschataCucurbita pepot0
- Treatment
- pollen from male flowers stored at 1O°Ce0
- Outcome
- C. maxima x C. pepoe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Open flower pollination at 7 a.m. of the flowering day with pollen from male flowers stored at 1O°C from 10 p.m. of the day before anthesis ; C. maxima x C. pepo and C. moschata x C. papo.”
t0“C. pepo, C. moschata and C. maxima”
Claim · model-written summary
Pollination using stored pollen produced C. moschata × C. papo hybrids.
- Taxon
- C. pepo, C. moschata and C. maximaCucurbita maximaCucurbita moschataCucurbita pepot0
- Treatment
- pollen from male flowers stored at 1O°Ce0
- Outcome
- C. moschata x C. papoe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Open flower pollination at 7 a.m. of the flowering day with pollen from male flowers stored at 1O°C from 10 p.m. of the day before anthesis ; C. maxima x C. pepo and C. moschata x C. papo.”
t0“C. pepo, C. moschata and C. maxima”