Abstract
1. The chromosome numbers of 12 species of the Cucurbitaceae have been determined from pollen mother cell material. The results may be summarized as follows: Melothria punctata, n = 12; Melothria abyssinica, n = 12; Momordica balsamina, n = 11; Luffa cylindrica, n = 13; Ecballium elaterium, n = 12; Citrullus colocynthis, n = 11; Cucumis myriocarpus, n = 12; Cucumis melo var. Golden Beauty, n = 12; Benincasa cerifera, n = 12; Cucurbita melanosperma, n = 20; Cucurbita pepo var. Orange gourd, n = 20; Cyclanthera pedata, n = 16. 2. The results of an experimental study of the fertility relations involving 4 genera and 8 species of the Cucurbitaceae indicate that species crossing is comparatively rare and not at all in accord with popular beliefs. Three species crosses were obtained: (1) between Cucurbita moschata and C. maxima; (2) between Cucurbita pepo and C. moschata; and (3) between Citrullus vulgaris and C. colocynthis. 3. The technique of making controlled pollinations among members of this family has been described. 4. The pertinent points in regard to chromosome number and geographical distribution are: (a) the Old World genera, with one exception, have basic numbers of 11-13; (b) there is a New World group having 16 as the basic number; and (c) there is a second New World group having 20-24 as the basic number.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 19
Claim · model-written summary
Melothria punctata has chromosome number n = 12.
Verbatim
e0“The chromosome numbers of 12 species of the Cucurbitaceae have been determined from pollen mother cell material”
e1“Melothria punctata, n = 12”
Claim · model-written summary
Melothria abyssinica has chromosome number n = 12.
Verbatim
e0“The chromosome numbers of 12 species of the Cucurbitaceae have been determined from pollen mother cell material”
e1“Melothria abyssinica, n = 12”
Claim · model-written summary
Momordica balsamina has chromosome number n = 11.
- Taxon
- Momordica balsamina
Momordica balsaminae1 - Outcome
- chromosome numberse0
- Value
- n = 11e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The chromosome numbers of 12 species of the Cucurbitaceae have been determined from pollen mother cell material”
e1“Momordica balsamina, n = 11”
Claim · model-written summary
Luffa cylindrica has chromosome number n = 13.
Verbatim
e0“The chromosome numbers of 12 species of the Cucurbitaceae have been determined from pollen mother cell material”
e1“Luffa cylindrica, n = 13”
Claim · model-written summary
Ecballium elaterium has chromosome number n = 12.
- Taxon
- Ecballium elaterium
Ecballium elateriume1 - Outcome
- chromosome numberse0
- Value
- n = 12e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The chromosome numbers of 12 species of the Cucurbitaceae have been determined from pollen mother cell material”
e1“Ecballium elaterium, n = 12”
Claim · model-written summary
Citrullus colocynthis has chromosome number n = 11.
- Taxon
- Citrullus colocynthis
Citrullus colocynthise1 - Outcome
- chromosome numberse0
- Value
- n = 11e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The chromosome numbers of 12 species of the Cucurbitaceae have been determined from pollen mother cell material”
e1“Citrullus colocynthis, n = 11”
Claim · model-written summary
Cucumis myriocarpus has chromosome number n = 12.
- Taxon
- Cucumis myriocarpus
Cucumis myriocarpuse1 - Outcome
- chromosome numberse0
- Value
- n = 12e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The chromosome numbers of 12 species of the Cucurbitaceae have been determined from pollen mother cell material”
e1“Cucumis myriocarpus, n = 12”
Claim · model-written summary
Cucumis melo var. Golden Beauty has chromosome number n = 12.
- Taxon
- Cucumis melo var. Golden Beauty
.jpg?width=60)
Cucumis meloe1 - Outcome
- chromosome numberse0
- Value
- n = 12e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“The chromosome numbers of 12 species of the Cucurbitaceae have been determined from pollen mother cell material”
e1“Cucumis melo var. Golden Beauty, n = 12”
Claim · model-written summary
Benincasa cerifera has chromosome number n = 12.
- Taxon
- Benincasa cerifera
Benincasa hispidae1 - Outcome
- chromosome numberse0
- Value
- n = 12e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The chromosome numbers of 12 species of the Cucurbitaceae have been determined from pollen mother cell material”
e1“Benincasa cerifera, n = 12”
Claim · model-written summary
Cucurbita melanosperma has chromosome number n = 20.
Verbatim
e0“The chromosome numbers of 12 species of the Cucurbitaceae have been determined from pollen mother cell material”
e1“Cucurbita melanosperma, n = 20”
Claim · model-written summary
Cucurbita pepo var. Orange gourd has chromosome number n = 20.
- Taxon
- Cucurbita pepo var. Orange gourd
Cucurbita pepoe1 - Outcome
- chromosome numberse0
- Value
- n = 20e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The chromosome numbers of 12 species of the Cucurbitaceae have been determined from pollen mother cell material”
e1“Cucurbita pepo var. Orange gourd, n = 20”
Claim · model-written summary
Cyclanthera pedata has chromosome number n = 16.
- Taxon
- Cyclanthera pedata
Cyclanthera pedatae1 - Outcome
- chromosome numberse0
- Value
- n = 16e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The chromosome numbers of 12 species of the Cucurbitaceae have been determined from pollen mother cell material”
e1“Cyclanthera pedata, n = 16”
Claim · model-written summary
Old World Cucurbitaceae genera, with one exception, have basic chromosome numbers of 11-13.
- Taxon
- CucurbitaceaeCucurbitaceaee0
- Outcome
- basic numberse1
- Value
- 11-13e1
Verbatim
e0“The chromosome numbers of 12 species of the Cucurbitaceae have been determined from pollen mother cell material”
e1“(a) the Old World genera, with one exception, have basic numbers of 11-13”
Claim · model-written summary
A New World group of Cucurbitaceae has basic chromosome number 16.
- Taxon
- CucurbitaceaeCucurbitaceaee0
- Outcome
- basic numbere1
- Value
- 16e1
Verbatim
e0“The chromosome numbers of 12 species of the Cucurbitaceae have been determined from pollen mother cell material”
e1“(b) there is a New World group having 16 as the basic number”
Claim · model-written summary
A second New World group of Cucurbitaceae has basic chromosome number 20-24.
- Taxon
- CucurbitaceaeCucurbitaceaee0
- Outcome
- basic numbere1
- Value
- 20-24e1
Verbatim
e0“The chromosome numbers of 12 species of the Cucurbitaceae have been determined from pollen mother cell material”
e1“(c) there is a second New World group having 20-24 as the basic number”
Claim · model-written summary
Species crossing in Cucurbitaceae is comparatively rare.
- Taxon
- CucurbitaceaeCucurbitaceaee0
- Outcome
- species crossinge0
- Qualifier
- comparatively raree0
Verbatim
e0“fertility relations involving 4 genera and 8 species of the Cucurbitaceae indicate that species crossing is comparatively rare”
Claim · model-written summary
Cucurbita moschata and C. maxima gave an interspecific cross.
- Taxon
- Cucurbita moschata
Cucurbita moschatae1 - Outcome
- species crosses were obtainede1
- Qualifier
- between Cucurbita moschata and C. maximae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Three species crosses were obtained: (1) between Cucurbita moschata and C. maxima”
Claim · model-written summary
Cucurbita pepo and C. moschata gave an interspecific cross.
- Taxon
- Cucurbita pepoCucurbita pepoe2
- Outcome
- species crosses were obtainede1
- Qualifier
- between Cucurbita pepo and C. moschatae2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Three species crosses were obtained: (1) between Cucurbita moschata and C. maxima”
e2“(2) between Cucurbita pepo and C. moschata”
Claim · model-written summary
Citrullus vulgaris and C. colocynthis gave an interspecific cross.
- Taxon
- Citrullus vulgaris
Citrullus lanatuse3 - Outcome
- species crosses were obtainede1
- Qualifier
- between Citrullus vulgaris and C. colocynthise3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Three species crosses were obtained: (1) between Cucurbita moschata and C. maxima”
e3“(3) between Citrullus vulgaris and C. colocynthis”