Variability in morphological characteristics

Core collections are important tools in genetic resources research and administration. At present, most core collection selection criteria are based on one of the following item characteristics: passport data, genetic markers, or morphological traits, which may lead to inadequate representations of variability in the complete collection.

10p vinarcissa 21-03-2023 3 1   Download

The Mediterranean cereal cyst nematode, Heterodera latipons, is an important plant parasitic nematode that negatively impacts cereal production worldwide, particularly in the Mediterranean Basin. Successful control of cereal cyst nematodes requires knowledge of the nematode species/pathotypes and their biology. However, little information is currently available concerning the phenotypic and genotypic variability of H. latipons populations in Turkey. This study analyzed the morphological/morphometric and genetic characteristics of Turkish H.

12p dolomite36 30-12-2021 10 1   Download

The present study was based on the bacula of 39 male (17 juvenile, 22 adult) stone marten (Martes foina) samples obtained from all geographical regions of Turkey between 1995 and 2016. Morphological variability in 11 characteristics of bacula was investigated. The purpose of this study was to measure numerical characters of the baculum, to identify relationships between measurements, and to evaluate variabilities in its morphology.

7p dolomite36 30-12-2021 7 0   Download

Thirty indigenous genotypes of Dioscorea (Dioscorea bulbifera) collected from twelve districts of Chhattisgarh viz., Bastar, Korba, Dhamtari, Rajnandgaon, Surguja, Kondagaon, Sukma, Balod, Narayanpur, Kanker, Dantewada and Bijapur. The collected genotypes show wide range of variability in morphological characteristics.

7p trinhthamhodang9 16-12-2020 12 2   Download

Sclerotium rolfsii causing collar rot is a major disease affecting crop stand and yield in chickpea. A comprehensive study was performed to report the variability in Sclerotium rolfsii isolates present in a major chick pea growing area, Kurnool District of Andhra Pradesh. A roving survey was conducted to collect 50 samples and was used for isolation of disease causing pathogen. 18 isolates of Sclerotium rolfsii were isolated to study the variability in morphological and cultural characteristics in the present study.

11p trinhthamhodang1216 19-11-2020 11 2   Download

The present studies were planned that the among the all ten isolates collected from different locations of Rajasthan was classified on their cultural and morphological characteristics in which isolate MPjd1 showed maximum colony diameter (90.00 mm) followed by isolate MPng2 (89.20 mm).

5p trinhthamhodang1216 19-11-2020 8 1   Download

The investigation was carried out to estimate the component of genetic variability and associated parameters among 12 IRRI CMS lines and evaluated for morphological characteristics that influence outcrossing rate in hybrid rice. There was a marked variation in out crossing rate of CMS lines ranging from 18% to 45% under uniform weather conditions for all the CMS lines. Variation in plant height, number of panicle per plant and panicle length appeared to have an influence on outcrossing rate.

9p nguaconbaynhay7 15-08-2020 19 1   Download

Palmyra palm (Borassus flabelliferL ) or commonly called Taad or Tarh is a palm tree of the Sugar palm group. It is an important multipurpose tree of great utility. There is a rich genetic diversity of palmyrah in Bihar, but no database is available regarding Palmyra. Thus a study was undertaken to study the variability in Palmyra for their plant morphological traits and yield parameters. Sample was collected during fruiting season and plants with diverse in nature for tree characteristics and fruit yield.

7p caygaocaolon6 30-07-2020 12 1   Download

Cultural, morphological and molecular characteristics of Fusarium oxysporum f. sp. ciceri, eight isolates indicated a great variability amongst them. However, the isolate FOC-2 (Jalna) exhibited maximum mycelial growth of 90.00 mm. The isolates viz., Jalna (FOC-2) and Beed (FOC-3) produced partially submerged (FOC-2) to submerged (FOC-3) white sparse dense growth with smooth margin and bright white substrate pigmentation. Maximum micro-conidial, macro-conidial and chlamydospore size (17.20 µm, 30.50 x 7.00 µm and 21.80 x 19.60 µm) was recorded in isolate Jalna (FOC-2).

14p angicungduoc6 20-07-2020 11 0   Download

Cultural, morphological and molecular characteristics of Fusarium oxysporum f. sp. udum were studied where eight isolates indicated a great variability amongst them. However, the isolate FOC-2 (Jalna) exhibited maximum mycelial growth of 90 mm. The isolates viz., Jalna (FOC-2) and Beed (FOC-3) produced partially submerged (FOC-2) to submerged (FOC-3) white sparse dense growth with smooth margin and bright white substrate pigmentation, respectively.

14p angicungduoc5 12-06-2020 15 1   Download

Purple blotch is the most destructive disease commonly prevailing in almost all onion growing pockets except in very cool production areas of the world. The present study was carried out to understand the diversity in Alternaria population causing purple blotch disease of onion. Out of fifty six geographical Alternaria isolates of Karnataka seventeen were selected as descriptive isolates based on morphological characteristics for understanding the genetic variability.

16p nguathienthan4 21-04-2020 6 1   Download

Current research efforts are directed towards native entomopathogenic fungi which are highly virulent to insect pests to develop efficient and eco-friendly bio-pesticides. From the insect cadavers fifteen different fungal isolates were isolated on DOC2-50% selective media and were identifying as isolates of Aspergillus tamari, A. niger and A. flavus. All the fifteen isolates showed variation in all the morphological characters studied. Highest mean colony diameter (mm) was reported in isolate EPF-14 at all the time intervals.

10p kethamoi2 14-12-2019 9 0   Download

The breadfruit tree (Artocarpus altilis), despite its food, therapeutic and agroforestry potential, remained underutilized in Benin due to the lack of information on the species. The objective of this study is to carry out the morphological characterization of the species in order to have a better knowledge of its diversity in Benin, an essential step in its safeguarding and its use. Thus, the discriminatory morphological descriptors in Artocarpus altilis in relation to the agro-ecological diversity of Benin have been identified. Foliar, fruit and seed characteristics were studied.

14p nguaconbaynhay1 04-12-2019 11 1   Download

On the basis of more than 48 years of morphological analysis of yearly and monthly values of the sunspot number, the aa index, the solar wind speed and interplanetary magnetic field, we point out the particularities of geomagnetic activity during the period 1996–2009. We especially investigate the last cycle 23 and the long minimum which followed it. During this period, the lowest values of the yearly averaged IMF (3 nT) and yearly averaged solar wind speed (364 km/s) are recorded in 1996, and 2009 respectively.

10p kethamoi1 17-11-2019 17 0   Download

Orbicule characteristics and pollen morphology were studied using light microscopy and scanning electron microscopy with 13 species of Oxalis section Alpinae, endemic to South America. Orbicules are either homogeneous or heterogeneous in size; surface smooth or with punctuations; margin smooth, lobed, or wavy; rounded, oblong, or irregular shapes; variable clustering.

8p vikimsa 22-02-2019 15 1   Download

Their hardened hooves and lighter bones enable them to endure long migrations. These adaptive attributes have facilitated their importation and spread by Indian and Arabian merchants across the Red Sea to the drier agro-ecological regions of the Horn of Africa (Loftus and Cunningham 2000). The Large East African Zebu cattle breeds, like the present-day Boran of Ethiopia, Kenya and Somalia, and the Butana and Kenana of the Sudan have very similar morphological characteristics to that of the zebu breeds of Asia. They are maintained by mainly pastoral communities in the Horn of Africa....

30p conduongdinhmenh 07-05-2013 40 5   Download