TOWER POPLAR

1980 ◽  
Vol 60 (3) ◽  
pp. 1055-1056 ◽  
Author(s):  
W. G. RONALD
Keyword(s):  
Growth Form ◽  
Female Parent ◽  
Male Parent ◽  
Columnar Growth

Populus × canescens ’Tower’ combines qualities of improved root-ability and foliage found in the female parent, P. alba L., with hardiness and columnar growth form of its male parent, P. tremula L. ’Erecta’. The distinctly columnar growth form makes the tree useful for landscape and shelterbelt applications. It is readily propagated from root and softwood cuttings.

scholarly journals Male parent birds exert more effort to reproduce in two desert passerines

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Donghui Ma ◽  
Mengjie Lu ◽  
Zhichang Cheng ◽  
Xingnan Du ◽  
Xiaoyu Zou ◽  
...  
Keyword(s):  
Reproductive Output ◽  
Female Parent ◽  
Northwest China ◽  
Reproductive Behaviour ◽  
Male Parent ◽  
Hatching Rate ◽  
Feeding Rates ◽  
Passerine Species ◽  
Arid Desert ◽  
Habitat Environment

Abstract Background Parental investment by birds is limited by the habitat environment, and a male parent increases its effort to reproduce in birds that live in high-altitude areas. Methods A study of the reproductive behaviour of the Saxaul Sparrow (Passer ammodendri) and the Isabelline Shrike (Lanius isabellinus) was carried out at the Gansu An’xi Extremely Arid Desert National Nature Reserve in northwest China to determine the reproductive input of passerine species in desert habitats. Results In Saxaul Sparrows, compared to the female parent, the male parent exhibited a significantly higher frequency of nest-defense behaviour (chirping and warning) during nesting, hatching and feeding periods. In addition, in comparison to the female parent, the male parent exhibited almost equal frequencies of nesting and incubation but fed nestlings significantly more times. Similar to the male sparrows, the feeding rates of the male Isabelline Shrikes were significantly higher than those of the females. The hatching rate and fledging rate of the Saxaul Sparrow on average in this study were 81.99 and 91.92%, respectively, while those of the shrike were 69.00 and 96.53%, respectively. Conclusions These two different passerine species living in the same desert environment exhibited the same trend in their reproductive investments. Adapting to desert environments is a strategy that may have evolved in passerines where male parent birds put more effort than females into reproduction to ensure high reproductive output.

A new hybrid between blue spruce and white spruce

1969 ◽  
Vol 47 (11) ◽  
pp. 1693-1700 ◽  
Author(s):  
James W. Hanover ◽  
Ronald C. Wilkinson
Keyword(s):  
Picea Glauca ◽  
Interspecific Hybrids ◽  
Growth Form ◽  
Female Parent ◽  
White Spruce ◽  
Early Growth ◽  
Hybrid Seed ◽  
Blue Spruce ◽  
Picea Pungens ◽  
Biochemical Analyses

Controlled pollinations were made within and between blue spruce (Picea pungens Engelm.) and white spruce (Picea glauca (Moench) Voss) in 1967 and 1968. Interspecific hybrids were obtained and verified by comparative measurements of several traits. The cross was successful when either species was used as the female parent. Hybrid seed germinated more rapidly than that of either species and hybrid seedlings showed some heterosis for early growth. Also, hybrid seedlings had needles intermediate between, and significantly different from, the parental seedlings. Growth form of the hybrid was quite variable compared with that of either species. Further evidence for the successful crossing of blue spruce and white spruce was provided by biochemical analyses of monoterpene compounds in the parents and progeny.

A natural first-generation hybrid between Rorippa barbareaefolia and R. islandica

1968 ◽  
Vol 46 (8) ◽  
pp. 1079-1081
Author(s):  
Gerald A. Mulligan ◽  
A. E. Porsild
Keyword(s):  
First Generation ◽  
Female Parent ◽  
Yukon Territory ◽  
Male Parent ◽  
Male Sterile ◽  
Pollen Mother Cells ◽  
Mother Cells ◽  
Generation Hybrid

All the seeds taken from a fruiting specimen of Rorippa barbareaefolia (2n = 16) growing in the Yukon Territory produced plants with 24 somatic chromosomes. These plants were first-generation hybrids between R. barbareaefolia (2n = 16) and R. islandica (2n = 23). The female parent, R. barbareaefolia, was male sterile. Pairing configurations in pollen mother cells of these first generation hybrids suggested that the male parent, R. islandica, was autotetraploid.

scholarly journals 462 PB 295 RAPD MAPPING OF THE ASPARAGUS (ASPARAGUS OFFICINALIS L.) GENOME

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 497d-497
Author(s):  
Chunxiao Jiang ◽  
Kenneth C. Sink
Keyword(s):  
Random Amplified Polymorphic Dna ◽  
Rapd Marker ◽  
Molecular Genetic ◽  
Female Parent ◽  
Male Parent ◽  
Asparagus Officinalis ◽  
Linkage Groups ◽  
Sex Type ◽  
Group Sex ◽  
Sex Locus

RAPD (Random Amplified Polymorphic DNA) is being utilized to construct a molecular genetic linkage map. The mapping population used is comprised of 65 individuals. Of the 240 decamer primers (Operon) tested to date, 50 polymorphic bands have been resolved. The 50 markers are divided into two groups according to the genotypes of the two parents. The first group is where the female parent is heterozygous and male parent is homozygous and it has 17 markers, while the second group, in which male parent is heterozygous and female parent is homozygous, has 33 markers. Analysis of the two groups by MAPMAKER indicated that two linkage groups are formed in the first group, and five linkage groups are formed in the second group. Sex type is controlled by the M locus. Genetic experiments have demonstrated that females are homogametic (mm) while male plants are heterogametic (Mm) for the sex locus. Two bulks of genomic DNA created by using 10 male and 10 female individuals in the population were screened to identify RAPD markers associated with the sex locus. RAPD marker OCP15-984 is closely linked with the M locus (7.6 cM).

scholarly journals PERFORMANCE OF GONAD MATURATION AND SPAWNED OF GROUPER BROODSTOCK CROSS BREEDING BETWEEN F-2 AND F-0

2014 ◽  
Vol 6 (1) ◽  
Author(s):  
Tri Djoko ◽  
Haryanti Haryanti ◽  
Sari Budi Moria ◽  
A Muzaki ◽  
I K Wardana
Keyword(s):  
Research And Development ◽  
Female Parent ◽  
Gonadal Development ◽  
Male Parent ◽  
Gonad Maturation ◽  
Cross Breeding ◽  
Natural Spawning ◽  
Production Success ◽  
Genetic Characters ◽  
Very High

<p>In fish grouper escpecially humpback grouper culture, seed and broodstock quality and availability determine the production success. Main supply of wild broodstock still dominates grouper hatchery activities, therefore, the exploitation of the wild broodstock is very high. Efforts to use the supply of cultured broodstock through selection and breeding processes will greatly determine their culture success. The purpose of this experiment was to get seeds from the cross breeding between F-2 and F-0. The research used two (2) concrete tanks with volume of 75 m<sup>3</sup> each. Each tank was filled with 20  fishes consisting of 10 fishes of F-2 and 10 fishes of F-0. The experiment was conducted the Institute of Mariculture Research and Development, Gondol, Bali. The result showed a good gonadal development and natural spawning of cross breeding between F-2 and F-0. Total number of eggs (1.320.000) was found the highest in May in tank A, while the highest fertilized eggs of 385.000 were found in June.  The SSCP analyses showed no difference in genetic characters of broodstock from cross-breeding between the female parent F-2 and F-0 male parent.</p> <p>Keywords: Humpback Grouper, gonad, spawned, cross breeding, larvae</p>

scholarly journals Pod set and Pollen Viability Studies in Yard Long Bean (Vigna unguiculata sub sp. sesquipedalis)

2019 ◽  
Vol 14 (2) ◽  
pp. 169-172
Author(s):  
Merin E G ◽  
Sarada S ◽  
Celine V A
Keyword(s):  
Vigna Unguiculata ◽  
Fruit Set ◽  
Pollen Viability ◽  
Female Parent ◽  
Male Parent ◽  
Time Interval ◽  
Time Intervals ◽  
Hand Pollination

A study was conducted in a yard long bean (Vigna unguiculata sup/ssp. sesquipedalis) hybrid VS 50 (Kakkamoola Local) x VS 26 (Vellayani Jyothika) to assess the percentage fruit set at two time intervals and to identify the best time interval for pollination in yard long bean hybrids. Hand pollination was done using VS 50 as female parent and VS 26 as male parent for seven consecutive days at two time intervals, 6.30 – 7.30 am and 7.30 – 8.30 am. Higher percentage of fruit set (36.8 %) was observed between 6:30 – 7:30 a.m. as compared to the time interval 7:30 – 8:30 am. (23.8%). Pollen viability was determined for the parents VS 50 (Kakkamoola Local) and VS 26 (Vellayani Jyothika) at 6.30, 7.30 and 8.30 am. Highest pollen viability for both the parents VS 50 and VS 26 was observed during 7.30 am. The present study shows that the best time interval for crossing in yard long bean is 6.30- 7.30 a.m.

Analisis Hasil hibridisasi Tanaman Jagung Manis (Zea Mays Saccharata) Dan Jagung Ketan(Zea Mays Ceratina) Menggunakanmetodepersilangan Buatan

2020 ◽  
Vol 9 (1) ◽  
pp. 54-60
Author(s):  
Johan Adi Saputra
Keyword(s):  
Zea Mays ◽  
Sweet Corn ◽  
Female Parent ◽  
Dry Weight ◽  
Male Parent ◽  
Seed Color ◽  
Seed Shape ◽  
Color Ratio ◽  
Total Percentage ◽  
Corn Plants

ABSTRACT - To support large-scal e corn exports by the Minister of Agriculture, production is needed. One way is by hybridizing corn plants to produce new corn plants with high production. This study aims to determine the results of crosses between sweet corn and sticky corn. Reinforcement Sidoarjo with a height of sea level ± 7m in May to August 2018. This research was carried out descriptively with 2 types of crosses of sweet corn as female parent and glutinous corn as male parent (TK) and glutinous corn as female parent and sweet corn a s male parent (KT), which is repeated 4 times then continued with unpaired T Test and the usual percentage to determine the difference between TK and K The variables observed were ear weight, seed color, seed shape, and dry weight per 100 seeds. The resu lts showed that crosses gave rise to 3 color variants namely white, yellowish white and yellow. With a color ratio of 3: 1 in the TK treatment and 1: 3 in the KT treatment. Crosses of sweet corn and sticky corn also produced 2 different forms of corn, namely wrinkles and solid forms with a total percentage of 16,625% in the form of wrinkles and 83,375% in round shape.    

Crossing relationships among seven members of the group of Aedes scutellaris (Walker) (Diptera: Culicidae)

1984 ◽  
Vol 74 (1) ◽  
pp. 65-78 ◽  
Author(s):  
S. R. Meek ◽  
W. W. MacDonald
Keyword(s):  
Culex Pipiens ◽  
Reciprocal Cross ◽  
Cytoplasmic Incompatibility ◽  
Female Parent ◽  
Male Parent ◽  
The West ◽  
Egg Hatch ◽  
Aedes Polynesiensis ◽  
Eastern Species

AbstractA rickettsia-free (aposymbiotic) stock of Aedes polynesiensis Marks (POLY-A) was crossed with (a) three symbiont-infected stocks of A. polynesiensis (POLY-S from Samoa and POLY-N and POLY-T from Fiji), (b) A. pseudoscutellaris (Theo.) (PSE) from Fiji, (c) A. alcasidi Huang (ALC), A. scutellaris katherinensis Woodhill (KATH), A. s. malayensis Colless (MAL) and A. s. scutellaris (Wlk.) (SCUT), which occur to the west of Fiji and (d) an aposymbiotic stock of A. cooki Belkin (CO) from Niue. It was bidirectionally compatible with CO, but in all other crosses compatibility was high when POLY-A was the male parent and very low when it was the female parent. Backcross data suggested that the crossing type was maternally inherited. ALC and KATH were bidirectionally compatible; both were virtually incompatible with POLY-S and PSE, compatible with SCUT when the latter was the female parent, and compatible with CO when the latter was the male parent. POLY-S females were moderately compatible with a third Fijian stock of A. polynesiensis (POLY-V), and POLY-N and POLY-V were compatible with PSE. If, as in Culex pipiens L., rickettsia-like symbionts are responsible for cytoplasmic incompatibility, then aposymbiotic males should cross successfully with symbiont-infected females, whereas the reciprocal cross should be unsuccessful. Since PSE, MAL and SCUT contain symbionts, their crossing relationships are consistent with the hypothesis. However, ALC and KATH appear to be aposymbiotic and their crossing relationships conflict with the hypothesis. There is little evidence of behavioural barriers to mating between species, but whereas male hybrids of two eastern species were capable of normal insemination, male hybrids between western and eastern species gave very low insemination rates. The egg-hatch rates from backcrosses of female hybrids between western and eastern species to the parents were reduced.

scholarly journals Prospects for the gene pool use of stone fruit plants in the distant hybridization of cherries

2021 ◽  
Vol 38 ◽  
pp. 00030
Author(s):  
Oksana Eremina ◽  
Viktor Eremin
Keyword(s):  
Gene Pool ◽  
Female Parent ◽  
Winter Hardiness ◽  
Male Parent ◽  
Stone Fruit ◽  
Distant Hybridization ◽  
Dormant Period ◽  
Late Emergence ◽  
Economically Valuable Traits ◽  
Fruit Plants

18 species of cherries are collected for the preservation and study in the gene pool of the station. The following species P. sachalinensis, P. kurilensis, P. pensylvanica, P. incisa, P. serrullata, P. lannesiana, P. fruticosa separated by economically valuable traits, were involved in distant hybridization as a female parent. Cherry varieties, donors of large – fruited fruit, performed as a male parent. The article shows the yielding results of interspecies crossing, the patterns of inheritance of hybrid traits of early and late emergence from the condition of a deep dormant period and winter hardiness. According to the results of our research, we recommended the following species – P. lannesiana, P. serrullata, P. sachalinensis as donors of short onset, and as for late and long-lasting – P. pensylvanica, P. incisa, P. fruticosa. Species which transmit the sign of winter hardiness to their progeny – P. fruticosa, P. incisa and P. kurilensis.

scholarly journals PERFORMANCE OF GONAD MATURATION AND SPAWNED OF GROUPER BROODSTOCK CROSS BREEDING BETWEEN F-2 AND F-0

2014 ◽  
Vol 6 (1) ◽  
Author(s):  
Tri Djoko ◽  
Haryanti Haryanti ◽  
Sari Budi Moria ◽  
A Muzaki ◽  
I K Wardana
Keyword(s):  
Research And Development ◽  
Female Parent ◽  
Gonadal Development ◽  
Male Parent ◽  
Gonad Maturation ◽  
Cross Breeding ◽  
Natural Spawning ◽  
Production Success ◽  
Genetic Characters ◽  
Very High

In fish grouper escpecially humpback grouper culture, seed and broodstock quality and availability determine the production success. Main supply of wild broodstock still dominates grouper hatchery activities, therefore, the exploitation of the wild broodstock is very high. Efforts to use the supply of cultured broodstock through selection and breeding processes will greatly determine their culture success. The purpose of this experiment was to get seeds from the cross breeding between F-2 and F-0. The research used two (2) concrete tanks with volume of 75 m3 each. Each tank was filled with 20  fishes consisting of 10 fishes of F-2 and 10 fishes of F-0. The experiment was conducted the Institute of Mariculture Research and Development, Gondol, Bali. The result showed a good gonadal development and natural spawning of cross breeding between F-2 and F-0. Total number of eggs (1.320.000) was found the highest in May in tank A, while the highest fertilized eggs of 385.000 were found in June.  The SSCP analyses showed no difference in genetic characters of broodstock from cross-breeding between the female parent F-2 and F-0 male parent. Keywords: Humpback Grouper, gonad, spawned, cross breeding, larvae

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