PLANT SEGREGATION AND POLLEN CHARACTERISTICS OF HIGHLAND PAPAYA (VASCONCELLEA PUBESCENS A.DC.) BASED ON SEX TYPES

IF 1.6 Q3 PLANT SCIENCES Sabrao Journal of Breeding and Genetics Pub Date : 2023-08-31 DOI:10.54910/sabrao2023.55.4.4
A. N. Laily, B. S. Daryono, A. Purwantoro, Dr. Sajjad Hussain Qureshi
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Abstract

Highland papaya (Vasconcellea pubescens A.DC.) is a member of the family Caricaceae and native to Ecuador. The plant’s introduction and cultivation were successful in specific highland areas of Indonesia but with limited growing areas. V. pubescens has monoecious and dioecious characteristics and allows fruit production from female dioecious and monoecious plants. This plant is valuable, and the knowledge about its sex pattern, though still limited, is crucial for its efficiency, productivity, and development. Hence, the presented study aimed to explain the patterns of plant segregation, as well as, pollen morphology and germination based on sex in V. pubescens. The investigations began by recognizing the total population of V. pubescens in its cultivated area for grouping and mapping according to sex. Observations on the pollen characteristics, such as, morphology and germination, used light microscopy and a Scanning Electron Microscope (SEM). The results revealed that the basis for plant segregation pattern depended on sex in male and female dioecious and monoecious plants of V. pubescens (1:5:1). In both sexes, the pollen morphological characteristics showed that the unit of monads, prolate spheroidal, radial, tricolporate, isopolar, reticulate, and P/E index of male dioecious pollen was 0.70, while monoecious was 0.52. Anthers and pollen grains from the male plant were round, but those of monoecious elongate more. However, no significant differences occurred among the sexes for pollens. The pollen grains from male flowers on male dioecious plants showed faster germination than monoecious individual plants, having a difference of 25.14 days.
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高原木瓜(vasconcellea pubescens a.dc .)的植物分离与花粉特性基于性别类型
高原番木瓜(Vasconcellea pubescens A.DC.)是番木瓜科的一员,原产于厄瓜多尔。该植物的引进和栽培在印度尼西亚的特定高地地区取得了成功,但种植面积有限。V. pubescens具有雌雄异株和雌雄异株的特性,允许雌雄异株和雌雄异株的雌性植物产生果实。这种植物很有价值,尽管对其性别模式的了解仍然有限,但对其效率、生产力和发育至关重要。因此,本研究旨在解释短毛堇的植物分离模式,以及花粉形态和萌发的性别。调查首先对其栽培区内的短毛卷虫种群总数进行了识别,并按性别进行了分组和制图。利用光镜和扫描电镜对花粉的形态、萌发等特征进行了观察。结果表明,在雌雄雌雄异株和雌雄雌雄株(1:5:1)中,植物分离模式的基础取决于性别。两性花粉形态特征表明,雄雄异株花粉单株、长形球状、放射状、三孔、等极、网状,P/E指数为0.70,雌雄同株为0.52。雄株的花药和花粉粒呈圆形,而雌雄同株的花药和花粉粒呈细长状。而在花粉方面,两性间无显著差异。雄性雌雄异株植株的雄花花粉粒萌发速度比雌雄同株植株快,相差25.14 d。
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来源期刊
Sabrao Journal of Breeding and Genetics
Sabrao Journal of Breeding and Genetics 农林科学-奶制品与动物科学
CiteScore
1.90
自引率
50.00%
发文量
63
期刊介绍: The SABRAO Journal of Breeding and Genetics is an international journal of plant breeding and genetics research and was first published in 1969. It is the official publication of the Society for the Advancement of Breeding Research in Asia and Oceania (SABRAO). Its objectives are to: promote the international exchange of research information on plant breeding and genetics, by describing new research findings, or ideas of a basic or practical nature; and be a medium for the exchange of ideas and news regarding members of the Society. The Journal gives priority to articles that are of direct relevance to plant breeders and with emphasis on the Asian region. Invited for publication are research articles, short communications, methods, reviews, commentaries, and opinion articles. Scientific contributions are refereed and edited to international standards. The journal publishes articles for SABRAO members mainly. The Journal preferred strongly that at least one author should be a current member of the Society. Non-members may also publish in the journal.
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